id	sid	tid	token	lemma	pos
ispiv-39	1	1	14th	14th	ADJ
ispiv-39	1	2	international	international	ADJ
ispiv-39	1	3	symposium	symposium	NOUN
ispiv-39	1	4	on	on	ADP
ispiv-39	1	5	particle	particle	NOUN
ispiv-39	1	6	image	image	NOUN
ispiv-39	1	7	velocimetry	velocimetry	NOUN
ispiv-39	1	8	–	–	PUNCT
ispiv-39	1	9	ispiv	ispiv	NOUN
ispiv-39	1	10	2021	2021	NUM
ispiv-39	1	11	august	august	PROPN
ispiv-39	1	12	1–5	1–5	NUM
ispiv-39	1	13	,	,	PUNCT
ispiv-39	1	14	2021	2021	NUM
ispiv-39	1	15	an	an	DET
ispiv-39	1	16	experimental	experimental	ADJ
ispiv-39	1	17	study	study	NOUN
ispiv-39	1	18	to	to	PART
ispiv-39	1	19	quantify	quantify	VERB
ispiv-39	1	20	the	the	DET
ispiv-39	1	21	rotor	rotor	NOUN
ispiv-39	1	22	-	-	PUNCT
ispiv-39	1	23	torotor	torotor	NOUN
ispiv-39	1	24	interaction	interaction	NOUN
ispiv-39	1	25	characteristics	characteristic	NOUN
ispiv-39	1	26	of	of	ADP
ispiv-39	1	27	a	a	DET
ispiv-39	1	28	small	small	ADJ
ispiv-39	1	29	unmanned	unmanned	ADJ
ispiv-39	1	30	-	-	PUNCT
ispiv-39	1	31	aerial	aerial	ADJ
ispiv-39	1	32	-	-	PUNCT
ispiv-39	1	33	vehicle	vehicle	NOUN
ispiv-39	1	34	wenwu	wenwu	PROPN
ispiv-39	1	35	zhou	zhou	PROPN
ispiv-39	1	36	,	,	PUNCT
ispiv-39	1	37	zhe	zhe	PROPN
ispiv-39	1	38	ning	ning	PROPN
ispiv-39	1	39	,	,	PUNCT
ispiv-39	1	40	hui	hui	PROPN
ispiv-39	1	41	hu	hu	PROPN
ispiv-39	1	42	(	(	PUNCT
ispiv-39	1	43			PROPN
ispiv-39	1	44	)	)	PUNCT
ispiv-39	1	45	1	1	NUM
ispiv-39	1	46	department	department	NOUN
ispiv-39	1	47	of	of	ADP
ispiv-39	1	48	aerospace	aerospace	PROPN
ispiv-39	1	49	engineering	engineering	NOUN
ispiv-39	1	50	,	,	PUNCT
ispiv-39	1	51	iowa	iowa	PROPN
ispiv-39	1	52	state	state	PROPN
ispiv-39	1	53	university	university	PROPN
ispiv-39	1	54	,	,	PUNCT
ispiv-39	1	55	ames	ames	PROPN
ispiv-39	1	56	,	,	PUNCT
ispiv-39	1	57	iowa	iowa	PROPN
ispiv-39	1	58	,	,	PUNCT
ispiv-39	1	59	50011	50011	NUM
ispiv-39	1	60	,	,	PUNCT
ispiv-39	1	61	usa	usa	PROPN
ispiv-39	1	62	(	(	PUNCT
ispiv-39	1	63			PROPN
ispiv-39	1	64	)	)	PUNCT
ispiv-39	1	65	corresponding	correspond	VERB
ispiv-39	1	66	author	author	NOUN
ispiv-39	1	67	.	.	PUNCT
ispiv-39	2	1	email	email	NOUN
ispiv-39	2	2	:	:	PUNCT
ispiv-39	2	3	huhui@iastate.edu	huhui@iastate.edu	VERB
ispiv-39	2	4	abstract	abstract	ADJ
ispiv-39	2	5	:	:	PUNCT
ispiv-39	2	6	the	the	DET
ispiv-39	2	7	flow	flow	NOUN
ispiv-39	2	8	interactions	interaction	NOUN
ispiv-39	2	9	between	between	ADP
ispiv-39	2	10	laterally	laterally	ADV
ispiv-39	2	11	aligned	align	VERB
ispiv-39	2	12	rotors	rotor	NOUN
ispiv-39	2	13	were	be	AUX
ispiv-39	2	14	investigated	investigate	VERB
ispiv-39	2	15	experimentally	experimentally	ADV
ispiv-39	2	16	to	to	PART
ispiv-39	2	17	study	study	VERB
ispiv-39	2	18	the	the	DET
ispiv-39	2	19	rotor	rotor	NOUN
ispiv-39	2	20	-	-	PUNCT
ispiv-39	2	21	to	to	ADP
ispiv-39	2	22	-	-	PUNCT
ispiv-39	2	23	rotor	rotor	NOUN
ispiv-39	2	24	interactions	interaction	NOUN
ispiv-39	2	25	on	on	ADP
ispiv-39	2	26	the	the	DET
ispiv-39	2	27	aerodynamic	aerodynamic	ADJ
ispiv-39	2	28	and	and	CCONJ
ispiv-39	2	29	aeroacoustic	aeroacoustic	ADJ
ispiv-39	2	30	performance	performance	NOUN
ispiv-39	2	31	of	of	ADP
ispiv-39	2	32	small	small	ADJ
ispiv-39	2	33	unmanned	unmanned	ADJ
ispiv-39	2	34	aerial	aerial	ADJ
ispiv-39	2	35	vehicles	vehicle	NOUN
ispiv-39	2	36	(	(	PUNCT
ispiv-39	2	37	uavs	uavs	NOUN
ispiv-39	2	38	)	)	PUNCT
ispiv-39	2	39	.	.	PUNCT
ispiv-39	3	1	two	two	NUM
ispiv-39	3	2	identical	identical	ADJ
ispiv-39	3	3	rotors	rotor	NOUN
ispiv-39	3	4	,	,	PUNCT
ispiv-39	3	5	similar	similar	ADJ
ispiv-39	3	6	to	to	ADP
ispiv-39	3	7	the	the	DET
ispiv-39	3	8	dimensions	dimension	NOUN
ispiv-39	3	9	of	of	ADP
ispiv-39	3	10	phantom	phantom	ADJ
ispiv-39	3	11	3	3	NUM
ispiv-39	3	12	(	(	PUNCT
ispiv-39	3	13	dji	dji	PROPN
ispiv-39	3	14	)	)	PUNCT
ispiv-39	3	15	,	,	PUNCT
ispiv-39	3	16	were	be	AUX
ispiv-39	3	17	mounted	mount	VERB
ispiv-39	3	18	separately	separately	ADV
ispiv-39	3	19	on	on	ADP
ispiv-39	3	20	different	different	ADJ
ispiv-39	3	21	stages	stage	NOUN
ispiv-39	3	22	in	in	ADP
ispiv-39	3	23	a	a	DET
ispiv-39	3	24	wide	wide	ADJ
ispiv-39	3	25	-	-	PUNCT
ispiv-39	3	26	open	open	ADJ
ispiv-39	3	27	space	space	NOUN
ispiv-39	3	28	.	.	PUNCT
ispiv-39	4	1	high	high	ADJ
ispiv-39	4	2	-	-	PUNCT
ispiv-39	4	3	accuracy	accuracy	NOUN
ispiv-39	4	4	force	force	NOUN
ispiv-39	4	5	and	and	CCONJ
ispiv-39	4	6	sound	sound	ADJ
ispiv-39	4	7	measurements	measurement	NOUN
ispiv-39	4	8	were	be	AUX
ispiv-39	4	9	conducted	conduct	VERB
ispiv-39	4	10	to	to	PART
ispiv-39	4	11	document	document	VERB
ispiv-39	4	12	the	the	DET
ispiv-39	4	13	thrust	thrust	NOUN
ispiv-39	4	14	and	and	CCONJ
ispiv-39	4	15	noise	noise	NOUN
ispiv-39	4	16	at	at	ADP
ispiv-39	4	17	various	various	ADJ
ispiv-39	4	18	separation	separation	NOUN
ispiv-39	4	19	distances	distance	NOUN
ispiv-39	4	20	.	.	PUNCT
ispiv-39	5	1	the	the	DET
ispiv-39	5	2	detailed	detailed	ADJ
ispiv-39	5	3	flow	flow	NOUN
ispiv-39	5	4	structures	structure	NOUN
ispiv-39	5	5	and	and	CCONJ
ispiv-39	5	6	corresponding	correspond	VERB
ispiv-39	5	7	vortex	vortex	NOUN
ispiv-39	5	8	evolutions	evolution	NOUN
ispiv-39	5	9	behind	behind	ADP
ispiv-39	5	10	the	the	DET
ispiv-39	5	11	rotors	rotor	NOUN
ispiv-39	5	12	were	be	AUX
ispiv-39	5	13	resolved	resolve	VERB
ispiv-39	5	14	clearly	clearly	ADV
ispiv-39	5	15	by	by	ADP
ispiv-39	5	16	using	use	VERB
ispiv-39	5	17	high	high	ADJ
ispiv-39	5	18	-	-	PUNCT
ispiv-39	5	19	resolution	resolution	NOUN
ispiv-39	5	20	piv	piv	NOUN
ispiv-39	5	21	measurements	measurement	NOUN
ispiv-39	5	22	.	.	PUNCT
ispiv-39	6	1	as	as	SCONJ
ispiv-39	6	2	the	the	DET
ispiv-39	6	3	rotor	rotor	NOUN
ispiv-39	6	4	separation	separation	NOUN
ispiv-39	6	5	distance	distance	NOUN
ispiv-39	6	6	decreased	decrease	VERB
ispiv-39	6	7	,	,	PUNCT
ispiv-39	6	8	intensified	intensify	VERB
ispiv-39	6	9	flow	flow	NOUN
ispiv-39	6	10	interactions	interaction	NOUN
ispiv-39	6	11	were	be	AUX
ispiv-39	6	12	noted	note	VERB
ispiv-39	6	13	within	within	ADP
ispiv-39	6	14	the	the	DET
ispiv-39	6	15	rotors	rotor	NOUN
ispiv-39	6	16	.	.	PUNCT
ispiv-39	7	1	more	more	ADV
ispiv-39	7	2	specifically	specifically	ADV
ispiv-39	7	3	,	,	PUNCT
ispiv-39	7	4	the	the	DET
ispiv-39	7	5	twinrotor	twinrotor	NOUN
ispiv-39	7	6	with	with	ADP
ispiv-39	7	7	separation	separation	NOUN
ispiv-39	7	8	distance	distance	NOUN
ispiv-39	7	9	of	of	ADP
ispiv-39	7	10	l=	l=	ADJ
ispiv-39	7	11	0.05d	0.05d	PROPN
ispiv-39	7	12	exhibited	exhibit	VERB
ispiv-39	7	13	a	a	DET
ispiv-39	7	14	significantly	significantly	ADV
ispiv-39	7	15	enhanced	enhance	VERB
ispiv-39	7	16	thrust	thrust	NOUN
ispiv-39	7	17	fluctuation	fluctuation	NOUN
ispiv-39	7	18	(	(	PUNCT
ispiv-39	7	19	i.e.	i.e.	X
ispiv-39	7	20	,	,	PUNCT
ispiv-39	7	21	~	~	PUNCT
ispiv-39	7	22	240	240	NUM
ispiv-39	7	23	%	%	NOUN
ispiv-39	7	24	higher	high	ADJ
ispiv-39	7	25	)	)	PUNCT
ispiv-39	7	26	and	and	CCONJ
ispiv-39	7	27	augmented	augment	VERB
ispiv-39	7	28	noise	noise	NOUN
ispiv-39	7	29	level	level	NOUN
ispiv-39	7	30	(	(	PUNCT
ispiv-39	7	31	i.e.	i.e.	X
ispiv-39	7	32	,	,	PUNCT
ispiv-39	7	33	~	~	PUNCT
ispiv-39	7	34	3db	3db	NOUN
ispiv-39	7	35	)	)	PUNCT
ispiv-39	7	36	in	in	ADP
ispiv-39	7	37	comparison	comparison	NOUN
ispiv-39	7	38	with	with	ADP
ispiv-39	7	39	that	that	PRON
ispiv-39	7	40	of	of	ADP
ispiv-39	7	41	baseline	baseline	NOUN
ispiv-39	7	42	case	case	NOUN
ispiv-39	7	43	.	.	PUNCT
ispiv-39	8	1	measured	measure	VERB
ispiv-39	8	2	piv	piv	NOUN
ispiv-39	8	3	results	result	NOUN
ispiv-39	8	4	indicated	indicate	VERB
ispiv-39	8	5	that	that	SCONJ
ispiv-39	8	6	a	a	DET
ispiv-39	8	7	strong	strong	ADJ
ispiv-39	8	8	recirculation	recirculation	NOUN
ispiv-39	8	9	region	region	NOUN
ispiv-39	8	10	existed	exist	VERB
ispiv-39	8	11	near	near	ADP
ispiv-39	8	12	the	the	DET
ispiv-39	8	13	top	top	ADJ
ispiv-39	8	14	-	-	PUNCT
ispiv-39	8	15	right	right	NOUN
ispiv-39	8	16	of	of	ADP
ispiv-39	8	17	the	the	DET
ispiv-39	8	18	twin	twin	ADJ
ispiv-39	8	19	-	-	PUNCT
ispiv-39	8	20	rotor	rotor	NOUN
ispiv-39	8	21	case	case	NOUN
ispiv-39	8	22	,	,	PUNCT
ispiv-39	8	23	which	which	PRON
ispiv-39	8	24	is	be	AUX
ispiv-39	8	25	believed	believe	VERB
ispiv-39	8	26	to	to	PART
ispiv-39	8	27	be	be	AUX
ispiv-39	8	28	the	the	DET
ispiv-39	8	29	reason	reason	NOUN
ispiv-39	8	30	for	for	ADP
ispiv-39	8	31	the	the	DET
ispiv-39	8	32	increased	increase	VERB
ispiv-39	8	33	thrust	thrust	NOUN
ispiv-39	8	34	fluctuations	fluctuation	NOUN
ispiv-39	8	35	and	and	CCONJ
ispiv-39	8	36	aeroacoustic	aeroacoustic	ADJ
ispiv-39	8	37	noise	noise	NOUN
ispiv-39	8	38	level	level	NOUN
ispiv-39	8	39	.	.	PUNCT
ispiv-39	9	1	i.	i.	PROPN
ispiv-39	9	2	introduction	introduction	PROPN
ispiv-39	9	3	recent	recent	ADJ
ispiv-39	9	4	advances	advance	NOUN
ispiv-39	9	5	in	in	ADP
ispiv-39	9	6	established	establish	VERB
ispiv-39	9	7	control	control	NOUN
ispiv-39	9	8	systems	system	NOUN
ispiv-39	9	9	and	and	CCONJ
ispiv-39	9	10	inexpensive	inexpensive	ADJ
ispiv-39	9	11	electronic	electronic	ADJ
ispiv-39	9	12	devices	device	NOUN
ispiv-39	9	13	have	have	AUX
ispiv-39	9	14	greatly	greatly	ADV
ispiv-39	9	15	encouraged	encourage	VERB
ispiv-39	9	16	the	the	DET
ispiv-39	9	17	development	development	NOUN
ispiv-39	9	18	of	of	ADP
ispiv-39	9	19	small	small	ADJ
ispiv-39	9	20	unmanned	unmanned	ADJ
ispiv-39	9	21	aerial	aerial	ADJ
ispiv-39	9	22	vehicles	vehicle	NOUN
ispiv-39	9	23	(	(	PUNCT
ispiv-39	9	24	uavs	uavs	NOUN
ispiv-39	9	25	)	)	PUNCT
ispiv-39	9	26	(	(	PUNCT
ispiv-39	9	27	bouabdallah	bouabdallah	VERB
ispiv-39	9	28	et	et	PROPN
ispiv-39	9	29	al	al	PROPN
ispiv-39	9	30	.	.	PROPN
ispiv-39	9	31	2007	2007	NUM
ispiv-39	9	32	;	;	PUNCT
ispiv-39	9	33	lucieer	lucieer	NOUN
ispiv-39	9	34	et	et	PROPN
ispiv-39	9	35	al	al	PROPN
ispiv-39	9	36	.	.	PROPN
ispiv-39	9	37	2014	2014	NUM
ispiv-39	9	38	;	;	PUNCT
ispiv-39	9	39	goebel	goebel	NOUN
ispiv-39	9	40	et	et	PROPN
ispiv-39	9	41	al	al	PROPN
ispiv-39	9	42	.	.	PROPN
ispiv-39	9	43	2015	2015	NUM
ispiv-39	9	44	)	)	PUNCT
ispiv-39	9	45	.	.	PUNCT
ispiv-39	10	1	especially	especially	ADV
ispiv-39	10	2	for	for	ADP
ispiv-39	10	3	uavs	uavs	NOUN
ispiv-39	10	4	with	with	ADP
ispiv-39	10	5	rotary	rotary	ADJ
ispiv-39	10	6	-	-	PUNCT
ispiv-39	10	7	wing	wing	NOUN
ispiv-39	10	8	system	system	NOUN
ispiv-39	10	9	,	,	PUNCT
ispiv-39	10	10	they	they	PRON
ispiv-39	10	11	are	be	AUX
ispiv-39	10	12	becoming	become	VERB
ispiv-39	10	13	increasingly	increasingly	ADV
ispiv-39	10	14	attractive	attractive	ADJ
ispiv-39	10	15	to	to	ADP
ispiv-39	10	16	engineers	engineer	NOUN
ispiv-39	10	17	due	due	ADP
ispiv-39	10	18	to	to	ADP
ispiv-39	10	19	their	their	PRON
ispiv-39	10	20	unique	unique	ADJ
ispiv-39	10	21	hovering	hovering	NOUN
ispiv-39	10	22	ability	ability	NOUN
ispiv-39	10	23	(	(	PUNCT
ispiv-39	10	24	e.g.	e.g.	ADV
ispiv-39	10	25	vertical	vertical	ADJ
ispiv-39	10	26	take	take	VERB
ispiv-39	10	27	-	-	PUNCT
ispiv-39	10	28	off	off	NOUN
ispiv-39	10	29	and	and	CCONJ
ispiv-39	10	30	landing	landing	NOUN
ispiv-39	10	31	)	)	PUNCT
ispiv-39	10	32	and	and	CCONJ
ispiv-39	10	33	user	user	NOUN
ispiv-39	10	34	-	-	PUNCT
ispiv-39	10	35	friendly	friendly	ADJ
ispiv-39	10	36	flight	flight	NOUN
ispiv-39	10	37	controllability	controllability	NOUN
ispiv-39	10	38	.	.	PUNCT
ispiv-39	11	1	varieties	variety	NOUN
ispiv-39	11	2	of	of	ADP
ispiv-39	11	3	applications	application	NOUN
ispiv-39	11	4	in	in	ADP
ispiv-39	11	5	civilian	civilian	ADJ
ispiv-39	11	6	fields	field	NOUN
ispiv-39	11	7	,	,	PUNCT
ispiv-39	11	8	such	such	ADJ
ispiv-39	11	9	as	as	ADP
ispiv-39	11	10	package	package	NOUN
ispiv-39	11	11	delivery	delivery	NOUN
ispiv-39	11	12	,	,	PUNCT
ispiv-39	11	13	field	field	NOUN
ispiv-39	11	14	site	site	NOUN
ispiv-39	11	15	surveillance	surveillance	NOUN
ispiv-39	11	16	,	,	PUNCT
ispiv-39	11	17	disease	disease	NOUN
ispiv-39	11	18	control	control	NOUN
ispiv-39	11	19	,	,	PUNCT
ispiv-39	11	20	video	video	NOUN
ispiv-39	11	21	taking	taking	NOUN
ispiv-39	11	22	,	,	PUNCT
ispiv-39	11	23	and	and	CCONJ
ispiv-39	11	24	personal	personal	ADJ
ispiv-39	11	25	entertainment	entertainment	NOUN
ispiv-39	11	26	,	,	PUNCT
ispiv-39	11	27	are	be	AUX
ispiv-39	11	28	all	all	PRON
ispiv-39	11	29	driving	drive	VERB
ispiv-39	11	30	incentives	incentive	NOUN
ispiv-39	11	31	to	to	PART
ispiv-39	11	32	adopt	adopt	VERB
ispiv-39	11	33	this	this	DET
ispiv-39	11	34	new	new	ADJ
ispiv-39	11	35	technique	technique	NOUN
ispiv-39	11	36	.	.	PUNCT
ispiv-39	12	1	for	for	ADP
ispiv-39	12	2	the	the	DET
ispiv-39	12	3	sake	sake	NOUN
ispiv-39	12	4	of	of	ADP
ispiv-39	12	5	providing	provide	VERB
ispiv-39	12	6	sufficient	sufficient	ADJ
ispiv-39	12	7	thrust	thrust	NOUN
ispiv-39	12	8	,	,	PUNCT
ispiv-39	12	9	multi	multi	ADJ
ispiv-39	12	10	-	-	ADJ
ispiv-39	12	11	rotor	rotor	ADJ
ispiv-39	12	12	configurations	configuration	NOUN
ispiv-39	12	13	are	be	AUX
ispiv-39	12	14	frequently	frequently	ADV
ispiv-39	12	15	used	use	VERB
ispiv-39	12	16	in	in	ADP
ispiv-39	12	17	small	small	ADJ
ispiv-39	12	18	uavs	uavs	NOUN
ispiv-39	12	19	during	during	ADP
ispiv-39	12	20	various	various	ADJ
ispiv-39	12	21	tasks	task	NOUN
ispiv-39	12	22	.	.	PUNCT
ispiv-39	13	1	for	for	ADP
ispiv-39	13	2	example	example	NOUN
ispiv-39	13	3	,	,	PUNCT
ispiv-39	13	4	the	the	DET
ispiv-39	13	5	quadrotor	quadrotor	NOUN
ispiv-39	13	6	,	,	PUNCT
ispiv-39	13	7	which	which	PRON
ispiv-39	13	8	is	be	AUX
ispiv-39	13	9	one	one	NUM
ispiv-39	13	10	of	of	ADP
ispiv-39	13	11	the	the	DET
ispiv-39	13	12	most	most	ADV
ispiv-39	13	13	widely	widely	ADV
ispiv-39	13	14	-	-	PUNCT
ispiv-39	13	15	used	use	VERB
ispiv-39	13	16	configurations	configuration	NOUN
ispiv-39	13	17	,	,	PUNCT
ispiv-39	13	18	can	can	AUX
ispiv-39	13	19	achieve	achieve	VERB
ispiv-39	13	20	6	6	NUM
ispiv-39	13	21	degrees	degree	NOUN
ispiv-39	13	22	of	of	ADP
ispiv-39	13	23	freedom	freedom	NOUN
ispiv-39	13	24	movement	movement	NOUN
ispiv-39	13	25	by	by	ADP
ispiv-39	13	26	simply	simply	ADV
ispiv-39	13	27	controlling	control	VERB
ispiv-39	13	28	the	the	DET
ispiv-39	13	29	rotational	rotational	ADJ
ispiv-39	13	30	speeds	speed	NOUN
ispiv-39	13	31	of	of	ADP
ispiv-39	13	32	individual	individual	ADJ
ispiv-39	13	33	rotors	rotor	NOUN
ispiv-39	13	34	(	(	PUNCT
ispiv-39	13	35	otsuka	otsuka	PROPN
ispiv-39	13	36	and	and	CCONJ
ispiv-39	13	37	nagatani	nagatani	VERB
ispiv-39	13	38	2016	2016	NUM
ispiv-39	13	39	)	)	PUNCT
ispiv-39	13	40	.	.	PUNCT
ispiv-39	14	1	though	though	SCONJ
ispiv-39	14	2	uavs	uavs	PROPN
ispiv-39	14	3	with	with	ADP
ispiv-39	14	4	multi	multi	ADJ
ispiv-39	14	5	-	-	ADJ
ispiv-39	14	6	rotary	rotary	ADJ
ispiv-39	14	7	-	-	PUNCT
ispiv-39	14	8	wing	wing	NOUN
ispiv-39	14	9	systems	system	NOUN
ispiv-39	14	10	are	be	AUX
ispiv-39	14	11	promising	promise	VERB
ispiv-39	14	12	technology	technology	NOUN
ispiv-39	14	13	for	for	ADP
ispiv-39	14	14	the	the	DET
ispiv-39	14	15	civilian	civilian	ADJ
ispiv-39	14	16	applications	application	NOUN
ispiv-39	14	17	,	,	PUNCT
ispiv-39	14	18	technical	technical	ADJ
ispiv-39	14	19	improvements	improvement	NOUN
ispiv-39	14	20	are	be	AUX
ispiv-39	14	21	highly	highly	ADV
ispiv-39	14	22	desired	desire	VERB
ispiv-39	14	23	for	for	ADP
ispiv-39	14	24	the	the	DET
ispiv-39	14	25	sake	sake	NOUN
ispiv-39	14	26	of	of	ADP
ispiv-39	14	27	extending	extend	VERB
ispiv-39	14	28	the	the	DET
ispiv-39	14	29	operating	operate	VERB
ispiv-39	14	30	mailto:huhui@iastate.edu	mailto:huhui@iastate.edu	PROPN
ispiv-39	14	31	time	time	NOUN
ispiv-39	14	32	and	and	CCONJ
ispiv-39	14	33	reducing	reduce	VERB
ispiv-39	14	34	the	the	DET
ispiv-39	14	35	aeroacoustic	aeroacoustic	ADJ
ispiv-39	14	36	noise	noise	NOUN
ispiv-39	14	37	.	.	PUNCT
ispiv-39	15	1	typically	typically	ADV
ispiv-39	15	2	,	,	PUNCT
ispiv-39	15	3	a	a	DET
ispiv-39	15	4	representative	representative	ADJ
ispiv-39	15	5	operating	operating	NOUN
ispiv-39	15	6	time	time	NOUN
ispiv-39	15	7	for	for	ADP
ispiv-39	15	8	small	small	ADJ
ispiv-39	15	9	uavs	uavs	NOUN
ispiv-39	15	10	is	be	AUX
ispiv-39	15	11	less	less	ADJ
ispiv-39	15	12	than	than	ADP
ispiv-39	15	13	half	half	DET
ispiv-39	15	14	an	an	DET
ispiv-39	15	15	hour	hour	NOUN
ispiv-39	15	16	,	,	PUNCT
ispiv-39	15	17	which	which	PRON
ispiv-39	15	18	is	be	AUX
ispiv-39	15	19	far	far	ADV
ispiv-39	15	20	from	from	ADP
ispiv-39	15	21	sufficient	sufficient	ADJ
ispiv-39	15	22	for	for	ADP
ispiv-39	15	23	complex	complex	ADJ
ispiv-39	15	24	tasks	task	NOUN
ispiv-39	15	25	.	.	PUNCT
ispiv-39	16	1	therefore	therefore	ADV
ispiv-39	16	2	,	,	PUNCT
ispiv-39	16	3	boosting	boost	VERB
ispiv-39	16	4	the	the	DET
ispiv-39	16	5	operation	operation	NOUN
ispiv-39	16	6	time	time	NOUN
ispiv-39	16	7	of	of	ADP
ispiv-39	16	8	uavs	uavs	NOUN
ispiv-39	16	9	is	be	AUX
ispiv-39	16	10	highly	highly	ADV
ispiv-39	16	11	desired	desire	VERB
ispiv-39	16	12	.	.	PUNCT
ispiv-39	17	1	one	one	NUM
ispiv-39	17	2	effective	effective	ADJ
ispiv-39	17	3	method	method	NOUN
ispiv-39	17	4	is	be	AUX
ispiv-39	17	5	to	to	PART
ispiv-39	17	6	improve	improve	VERB
ispiv-39	17	7	the	the	DET
ispiv-39	17	8	aerodynamic	aerodynamic	ADJ
ispiv-39	17	9	performance	performance	NOUN
ispiv-39	17	10	of	of	ADP
ispiv-39	17	11	multi	multi	ADJ
ispiv-39	17	12	-	-	ADJ
ispiv-39	17	13	rotor	rotor	ADJ
ispiv-39	17	14	uavs	uavs	NOUN
ispiv-39	17	15	.	.	PUNCT
ispiv-39	18	1	since	since	SCONJ
ispiv-39	18	2	the	the	DET
ispiv-39	18	3	knowledge	knowledge	NOUN
ispiv-39	18	4	pertinent	pertinent	ADJ
ispiv-39	18	5	to	to	ADP
ispiv-39	18	6	helicopter	helicopter	NOUN
ispiv-39	18	7	rotor	rotor	NOUN
ispiv-39	18	8	dynamics	dynamic	NOUN
ispiv-39	18	9	ca	can	AUX
ispiv-39	18	10	n’t	not	PART
ispiv-39	18	11	be	be	AUX
ispiv-39	18	12	applied	apply	VERB
ispiv-39	18	13	to	to	ADP
ispiv-39	18	14	small	small	ADJ
ispiv-39	18	15	uavs	uavs	NOUN
ispiv-39	18	16	directly	directly	ADV
ispiv-39	18	17	,	,	PUNCT
ispiv-39	18	18	it	it	PRON
ispiv-39	18	19	requires	require	VERB
ispiv-39	18	20	comprehensive	comprehensive	ADJ
ispiv-39	18	21	studies	study	NOUN
ispiv-39	18	22	to	to	PART
ispiv-39	18	23	understand	understand	VERB
ispiv-39	18	24	the	the	DET
ispiv-39	18	25	aerodynamic	aerodynamic	ADJ
ispiv-39	18	26	performance	performance	NOUN
ispiv-39	18	27	of	of	ADP
ispiv-39	18	28	small	small	ADJ
ispiv-39	18	29	uavs	uavs	NOUN
ispiv-39	18	30	.	.	PUNCT
ispiv-39	19	1	bristeau	bristeau	PROPN
ispiv-39	19	2	et	et	PROPN
ispiv-39	19	3	al	al	PROPN
ispiv-39	19	4	.	.	PUNCT
ispiv-39	20	1	(	(	PUNCT
ispiv-39	20	2	bristeau	bristeau	PROPN
ispiv-39	20	3	et	et	PROPN
ispiv-39	20	4	al	al	PROPN
ispiv-39	20	5	.	.	PROPN
ispiv-39	20	6	2009	2009	NUM
ispiv-39	20	7	)	)	PUNCT
ispiv-39	20	8	,	,	PUNCT
ispiv-39	20	9	who	who	PRON
ispiv-39	20	10	studied	study	VERB
ispiv-39	20	11	the	the	DET
ispiv-39	20	12	aerodynamic	aerodynamic	ADJ
ispiv-39	20	13	effects	effect	NOUN
ispiv-39	20	14	of	of	ADP
ispiv-39	20	15	the	the	DET
ispiv-39	20	16	rotors	rotor	NOUN
ispiv-39	20	17	and	and	CCONJ
ispiv-39	20	18	their	their	PRON
ispiv-39	20	19	interactions	interaction	NOUN
ispiv-39	20	20	with	with	ADP
ispiv-39	20	21	the	the	DET
ispiv-39	20	22	uav	uav	PROPN
ispiv-39	20	23	body	body	NOUN
ispiv-39	20	24	motion	motion	NOUN
ispiv-39	20	25	,	,	PUNCT
ispiv-39	20	26	found	find	VERB
ispiv-39	20	27	that	that	SCONJ
ispiv-39	20	28	the	the	DET
ispiv-39	20	29	rotor	rotor	NOUN
ispiv-39	20	30	flexibility	flexibility	NOUN
ispiv-39	20	31	played	play	VERB
ispiv-39	20	32	an	an	DET
ispiv-39	20	33	important	important	ADJ
ispiv-39	20	34	role	role	NOUN
ispiv-39	20	35	in	in	ADP
ispiv-39	20	36	the	the	DET
ispiv-39	20	37	uavs	uavs	NOUN
ispiv-39	20	38	’	'	PUNCT
ispiv-39	20	39	aerodynamics	aerodynamic	NOUN
ispiv-39	20	40	.	.	PUNCT
ispiv-39	21	1	to	to	PART
ispiv-39	21	2	obtain	obtain	VERB
ispiv-39	21	3	first	first	ADJ
ispiv-39	21	4	-	-	PUNCT
ispiv-39	21	5	hand	hand	NOUN
ispiv-39	21	6	aerodynamic	aerodynamic	ADJ
ispiv-39	21	7	data	datum	NOUN
ispiv-39	21	8	on	on	ADP
ispiv-39	21	9	commercial	commercial	ADJ
ispiv-39	21	10	uavs	uavs	NOUN
ispiv-39	21	11	,	,	PUNCT
ispiv-39	21	12	russell	russell	PROPN
ispiv-39	21	13	et	et	PROPN
ispiv-39	21	14	al	al	PROPN
ispiv-39	21	15	.	.	PUNCT
ispiv-39	22	1	(	(	PUNCT
ispiv-39	22	2	russell	russell	PROPN
ispiv-39	22	3	et	et	PROPN
ispiv-39	22	4	al	al	PROPN
ispiv-39	22	5	.	.	PROPN
ispiv-39	22	6	2016	2016	NUM
ispiv-39	22	7	)	)	PUNCT
ispiv-39	22	8	experimentally	experimentally	ADV
ispiv-39	22	9	quantified	quantify	VERB
ispiv-39	22	10	the	the	DET
ispiv-39	22	11	thrust	thrust	ADJ
ispiv-39	22	12	coefficients	coefficient	NOUN
ispiv-39	22	13	of	of	ADP
ispiv-39	22	14	five	five	NUM
ispiv-39	22	15	multi	multi	ADJ
ispiv-39	22	16	-	-	ADJ
ispiv-39	22	17	rotor	rotor	ADJ
ispiv-39	22	18	uavs	uavs	NOUN
ispiv-39	22	19	at	at	ADP
ispiv-39	22	20	various	various	ADJ
ispiv-39	22	21	wind	wind	NOUN
ispiv-39	22	22	speeds	speed	NOUN
ispiv-39	22	23	,	,	PUNCT
ispiv-39	22	24	rotor	rotor	NOUN
ispiv-39	22	25	speeds	speed	NOUN
ispiv-39	22	26	,	,	PUNCT
ispiv-39	22	27	and	and	CCONJ
ispiv-39	22	28	vehicle	vehicle	NOUN
ispiv-39	22	29	attitudes	attitude	NOUN
ispiv-39	22	30	.	.	PUNCT
ispiv-39	23	1	similar	similar	ADJ
ispiv-39	23	2	studies	study	NOUN
ispiv-39	23	3	were	be	AUX
ispiv-39	23	4	performed	perform	VERB
ispiv-39	23	5	by	by	ADP
ispiv-39	23	6	brandt	brandt	PROPN
ispiv-39	23	7	and	and	CCONJ
ispiv-39	23	8	selig	selig	PROPN
ispiv-39	23	9	(	(	PUNCT
ispiv-39	23	10	brandt	brandt	PROPN
ispiv-39	23	11	and	and	CCONJ
ispiv-39	23	12	selig	selig	PROPN
ispiv-39	23	13	2011	2011	NUM
ispiv-39	23	14	)	)	PUNCT
ispiv-39	23	15	and	and	CCONJ
ispiv-39	23	16	merchant	merchant	NOUN
ispiv-39	23	17	and	and	CCONJ
ispiv-39	23	18	miller	miller	PROPN
ispiv-39	23	19	(	(	PUNCT
ispiv-39	23	20	merchant	merchant	NOUN
ispiv-39	23	21	and	and	CCONJ
ispiv-39	23	22	miller	miller	PROPN
ispiv-39	23	23	2006	2006	NUM
ispiv-39	23	24	)	)	PUNCT
ispiv-39	23	25	,	,	PUNCT
ispiv-39	23	26	who	who	PRON
ispiv-39	23	27	quantified	quantify	VERB
ispiv-39	23	28	the	the	DET
ispiv-39	23	29	performance	performance	NOUN
ispiv-39	23	30	of	of	ADP
ispiv-39	23	31	small	small	ADJ
ispiv-39	23	32	propeller	propeller	NOUN
ispiv-39	23	33	at	at	ADP
ispiv-39	23	34	low	low	ADJ
ispiv-39	23	35	reynolds	reynolds	PROPN
ispiv-39	23	36	numbers	number	NOUN
ispiv-39	23	37	.	.	PUNCT
ispiv-39	24	1	aside	aside	ADV
ispiv-39	24	2	from	from	ADP
ispiv-39	24	3	the	the	DET
ispiv-39	24	4	aerodynamic	aerodynamic	ADJ
ispiv-39	24	5	performance	performance	NOUN
ispiv-39	24	6	,	,	PUNCT
ispiv-39	24	7	the	the	DET
ispiv-39	24	8	broadband	broadband	NOUN
ispiv-39	24	9	noise	noise	NOUN
ispiv-39	24	10	associated	associate	VERB
ispiv-39	24	11	with	with	ADP
ispiv-39	24	12	rotor	rotor	NOUN
ispiv-39	24	13	rotating	rotating	NOUN
ispiv-39	24	14	is	be	AUX
ispiv-39	24	15	another	another	DET
ispiv-39	24	16	issue	issue	NOUN
ispiv-39	24	17	that	that	PRON
ispiv-39	24	18	needs	need	VERB
ispiv-39	24	19	to	to	PART
ispiv-39	24	20	be	be	AUX
ispiv-39	24	21	addressed	address	VERB
ispiv-39	24	22	for	for	ADP
ispiv-39	24	23	small	small	ADJ
ispiv-39	24	24	uavs	uavs	NOUN
ispiv-39	24	25	(	(	PUNCT
ispiv-39	24	26	gur	gur	PROPN
ispiv-39	24	27	and	and	CCONJ
ispiv-39	24	28	rosen	rosen	PROPN
ispiv-39	24	29	2009	2009	NUM
ispiv-39	24	30	)	)	PUNCT
ispiv-39	24	31	.	.	PUNCT
ispiv-39	25	1	aeroacoustic	aeroacoustic	ADJ
ispiv-39	25	2	noise	noise	NOUN
ispiv-39	25	3	not	not	PART
ispiv-39	25	4	only	only	ADV
ispiv-39	25	5	can	can	AUX
ispiv-39	25	6	be	be	AUX
ispiv-39	25	7	an	an	DET
ispiv-39	25	8	annoyance	annoyance	NOUN
ispiv-39	25	9	to	to	ADP
ispiv-39	25	10	human	human	ADJ
ispiv-39	25	11	life	life	NOUN
ispiv-39	25	12	,	,	PUNCT
ispiv-39	25	13	but	but	CCONJ
ispiv-39	25	14	to	to	ADP
ispiv-39	25	15	the	the	DET
ispiv-39	25	16	well	well	ADV
ispiv-39	25	17	-	-	PUNCT
ispiv-39	25	18	being	being	NOUN
ispiv-39	25	19	of	of	ADP
ispiv-39	25	20	animals	animal	NOUN
ispiv-39	25	21	as	as	ADP
ispiv-39	25	22	well(ditmer	well(ditmer	PROPN
ispiv-39	25	23	et	et	PROPN
ispiv-39	25	24	al	al	PROPN
ispiv-39	25	25	.	.	PROPN
ispiv-39	25	26	2015	2015	NUM
ispiv-39	25	27	)	)	PUNCT
ispiv-39	25	28	.	.	PUNCT
ispiv-39	26	1	leslie	leslie	PROPN
ispiv-39	26	2	et	et	PROPN
ispiv-39	26	3	al	al	PROPN
ispiv-39	26	4	.	.	PUNCT
ispiv-39	27	1	(	(	PUNCT
ispiv-39	27	2	leslie	leslie	PROPN
ispiv-39	27	3	et	et	PROPN
ispiv-39	27	4	al	al	PROPN
ispiv-39	27	5	.	.	PROPN
ispiv-39	27	6	2008	2008	NUM
ispiv-39	27	7	)	)	PUNCT
ispiv-39	27	8	applied	apply	VERB
ispiv-39	27	9	a	a	DET
ispiv-39	27	10	straight	straight	ADJ
ispiv-39	27	11	transition	transition	NOUN
ispiv-39	27	12	strip	strip	NOUN
ispiv-39	27	13	at	at	ADP
ispiv-39	27	14	the	the	DET
ispiv-39	27	15	leading	lead	VERB
ispiv-39	27	16	edge	edge	NOUN
ispiv-39	27	17	of	of	ADP
ispiv-39	27	18	blade	blade	NOUN
ispiv-39	27	19	,	,	PUNCT
ispiv-39	27	20	and	and	CCONJ
ispiv-39	27	21	found	find	VERB
ispiv-39	27	22	that	that	SCONJ
ispiv-39	27	23	the	the	DET
ispiv-39	27	24	broadband	broadband	NOUN
ispiv-39	27	25	noise	noise	NOUN
ispiv-39	27	26	of	of	ADP
ispiv-39	27	27	the	the	DET
ispiv-39	27	28	uav	uav	PROPN
ispiv-39	27	29	was	be	AUX
ispiv-39	27	30	greatly	greatly	ADV
ispiv-39	27	31	reduced	reduce	VERB
ispiv-39	27	32	.	.	PUNCT
ispiv-39	28	1	sinibaldi	sinibaldi	ADJ
ispiv-39	28	2	and	and	CCONJ
ispiv-39	28	3	marino	marino	PROPN
ispiv-39	28	4	(	(	PUNCT
ispiv-39	28	5	sinibaldi	sinibaldi	ADJ
ispiv-39	28	6	and	and	CCONJ
ispiv-39	28	7	marino	marino	PROPN
ispiv-39	28	8	2013	2013	NUM
ispiv-39	28	9	)	)	PUNCT
ispiv-39	28	10	experimentally	experimentally	ADV
ispiv-39	28	11	measured	measure	VERB
ispiv-39	28	12	the	the	DET
ispiv-39	28	13	aeroacoustic	aeroacoustic	ADJ
ispiv-39	28	14	signatures	signature	NOUN
ispiv-39	28	15	of	of	ADP
ispiv-39	28	16	two	two	NUM
ispiv-39	28	17	uav	uav	PROPN
ispiv-39	28	18	propellers	propeller	NOUN
ispiv-39	28	19	,	,	PUNCT
ispiv-39	28	20	and	and	CCONJ
ispiv-39	28	21	reported	report	VERB
ispiv-39	28	22	that	that	SCONJ
ispiv-39	28	23	while	while	SCONJ
ispiv-39	28	24	the	the	DET
ispiv-39	28	25	optimized	optimize	VERB
ispiv-39	28	26	propeller	propeller	NOUN
ispiv-39	28	27	was	be	AUX
ispiv-39	28	28	much	much	ADV
ispiv-39	28	29	lower	low	ADJ
ispiv-39	28	30	than	than	ADP
ispiv-39	28	31	that	that	PRON
ispiv-39	28	32	of	of	ADP
ispiv-39	28	33	the	the	DET
ispiv-39	28	34	conventional	conventional	ADJ
ispiv-39	28	35	one	one	NUM
ispiv-39	28	36	at	at	ADP
ispiv-39	28	37	lower	low	ADJ
ispiv-39	28	38	thrust	thrust	PROPN
ispiv-39	28	39	,	,	PUNCT
ispiv-39	28	40	the	the	DET
ispiv-39	28	41	noise	noise	NOUN
ispiv-39	28	42	of	of	ADP
ispiv-39	28	43	the	the	DET
ispiv-39	28	44	two	two	NUM
ispiv-39	28	45	would	would	AUX
ispiv-39	28	46	reach	reach	VERB
ispiv-39	28	47	a	a	DET
ispiv-39	28	48	similar	similar	ADJ
ispiv-39	28	49	magnitude	magnitude	NOUN
ispiv-39	28	50	as	as	SCONJ
ispiv-39	28	51	the	the	DET
ispiv-39	28	52	thrust	thrust	NOUN
ispiv-39	28	53	increased	increase	VERB
ispiv-39	28	54	to	to	ADP
ispiv-39	28	55	a	a	DET
ispiv-39	28	56	higher	high	ADJ
ispiv-39	28	57	value	value	NOUN
ispiv-39	28	58	.	.	PUNCT
ispiv-39	29	1	multi	multi	ADJ
ispiv-39	29	2	-	-	ADJ
ispiv-39	29	3	rotor	rotor	ADJ
ispiv-39	29	4	uavs	uavs	NOUN
ispiv-39	29	5	commonly	commonly	ADV
ispiv-39	29	6	feature	feature	VERB
ispiv-39	29	7	an	an	DET
ispiv-39	29	8	even	even	ADJ
ispiv-39	29	9	number	number	NOUN
ispiv-39	29	10	of	of	ADP
ispiv-39	29	11	rotors	rotor	NOUN
ispiv-39	29	12	that	that	PRON
ispiv-39	29	13	are	be	AUX
ispiv-39	29	14	designed	design	VERB
ispiv-39	29	15	into	into	ADP
ispiv-39	29	16	two	two	NUM
ispiv-39	29	17	sets	set	NOUN
ispiv-39	29	18	with	with	ADP
ispiv-39	29	19	either	either	CCONJ
ispiv-39	29	20	clockwise	clockwise	NOUN
ispiv-39	29	21	or	or	CCONJ
ispiv-39	29	22	counter	counter	NOUN
ispiv-39	29	23	-	-	NOUN
ispiv-39	29	24	clockwise	clockwise	NOUN
ispiv-39	29	25	rotations	rotation	NOUN
ispiv-39	29	26	.	.	PUNCT
ispiv-39	30	1	very	very	ADV
ispiv-39	30	2	few	few	ADJ
ispiv-39	30	3	studies	study	NOUN
ispiv-39	30	4	can	can	AUX
ispiv-39	30	5	be	be	AUX
ispiv-39	30	6	found	find	VERB
ispiv-39	30	7	in	in	ADP
ispiv-39	30	8	literature	literature	NOUN
ispiv-39	30	9	that	that	PRON
ispiv-39	30	10	examined	examine	VERB
ispiv-39	30	11	the	the	DET
ispiv-39	30	12	rotor	rotor	NOUN
ispiv-39	30	13	-	-	PUNCT
ispiv-39	30	14	to	to	ADP
ispiv-39	30	15	-	-	PUNCT
ispiv-39	30	16	rotor	rotor	NOUN
ispiv-39	30	17	interactions	interaction	NOUN
ispiv-39	30	18	on	on	ADP
ispiv-39	30	19	the	the	DET
ispiv-39	30	20	aerodynamic	aerodynamic	ADJ
ispiv-39	30	21	and	and	CCONJ
ispiv-39	30	22	aeroacoustic	aeroacoustic	ADJ
ispiv-39	30	23	performances	performance	NOUN
ispiv-39	30	24	of	of	ADP
ispiv-39	30	25	uavs	uavs	NOUN
ispiv-39	30	26	.	.	PUNCT
ispiv-39	31	1	this	this	PRON
ispiv-39	31	2	is	be	AUX
ispiv-39	31	3	with	with	ADP
ispiv-39	31	4	the	the	DET
ispiv-39	31	5	exception	exception	NOUN
ispiv-39	31	6	of	of	ADP
ispiv-39	31	7	yoon	yoon	PROPN
ispiv-39	31	8	et	et	PROPN
ispiv-39	31	9	al.(yoon	al.(yoon	PROPN
ispiv-39	31	10	et	et	PROPN
ispiv-39	31	11	al	al	PROPN
ispiv-39	31	12	.	.	PROPN
ispiv-39	31	13	2016	2016	NUM
ispiv-39	31	14	)	)	PUNCT
ispiv-39	31	15	,	,	PUNCT
ispiv-39	31	16	who	who	PRON
ispiv-39	31	17	computationally	computationally	ADV
ispiv-39	31	18	analyzed	analyze	VERB
ispiv-39	31	19	the	the	DET
ispiv-39	31	20	aerodynamics	aerodynamics	NOUN
ispiv-39	31	21	performance	performance	NOUN
ispiv-39	31	22	of	of	ADP
ispiv-39	31	23	multi	multi	ADJ
ispiv-39	31	24	-	-	ADJ
ispiv-39	31	25	rotor	rotor	ADJ
ispiv-39	31	26	flows	flow	NOUN
ispiv-39	31	27	in	in	ADP
ispiv-39	31	28	a	a	DET
ispiv-39	31	29	quadcopter	quadcopter	NOUN
ispiv-39	31	30	,	,	PUNCT
ispiv-39	31	31	and	and	CCONJ
ispiv-39	31	32	found	find	VERB
ispiv-39	31	33	that	that	SCONJ
ispiv-39	31	34	the	the	DET
ispiv-39	31	35	rotor	rotor	NOUN
ispiv-39	31	36	interaction	interaction	NOUN
ispiv-39	31	37	had	have	VERB
ispiv-39	31	38	significant	significant	ADJ
ispiv-39	31	39	effects	effect	NOUN
ispiv-39	31	40	on	on	ADP
ispiv-39	31	41	the	the	DET
ispiv-39	31	42	vertical	vertical	ADJ
ispiv-39	31	43	forces	force	NOUN
ispiv-39	31	44	in	in	ADP
ispiv-39	31	45	hover	hover	PROPN
ispiv-39	31	46	motion	motion	NOUN
ispiv-39	31	47	.	.	PUNCT
ispiv-39	32	1	intaratep	intaratep	NOUN
ispiv-39	32	2	et	et	NOUN
ispiv-39	32	3	al.(intaratep	al.(intaratep	PROPN
ispiv-39	32	4	et	et	PROPN
ispiv-39	32	5	al	al	PROPN
ispiv-39	32	6	.	.	PROPN
ispiv-39	32	7	2016	2016	NUM
ispiv-39	32	8	)	)	PUNCT
ispiv-39	32	9	measured	measure	VERB
ispiv-39	32	10	the	the	DET
ispiv-39	32	11	acoustic	acoustic	ADJ
ispiv-39	32	12	levels	level	NOUN
ispiv-39	32	13	of	of	ADP
ispiv-39	32	14	a	a	DET
ispiv-39	32	15	phantom	phantom	ADJ
ispiv-39	32	16	ii	ii	NOUN
ispiv-39	32	17	at	at	ADP
ispiv-39	32	18	static	static	ADJ
ispiv-39	32	19	thrust	thrust	VERB
ispiv-39	32	20	conditions	condition	NOUN
ispiv-39	32	21	and	and	CCONJ
ispiv-39	32	22	reported	report	VERB
ispiv-39	32	23	a	a	DET
ispiv-39	32	24	dramatic	dramatic	ADJ
ispiv-39	32	25	increase	increase	NOUN
ispiv-39	32	26	in	in	ADP
ispiv-39	32	27	broadband	broadband	NOUN
ispiv-39	32	28	noise	noise	NOUN
ispiv-39	32	29	as	as	SCONJ
ispiv-39	32	30	the	the	DET
ispiv-39	32	31	rotor	rotor	NOUN
ispiv-39	32	32	number	number	NOUN
ispiv-39	32	33	increased	increase	VERB
ispiv-39	32	34	from	from	ADP
ispiv-39	32	35	2	2	NUM
ispiv-39	32	36	to	to	ADP
ispiv-39	32	37	4	4	NUM
ispiv-39	32	38	.	.	PUNCT
ispiv-39	32	39	though	though	SCONJ
ispiv-39	32	40	those	those	DET
ispiv-39	32	41	studies	study	NOUN
ispiv-39	32	42	documented	document	VERB
ispiv-39	32	43	the	the	DET
ispiv-39	32	44	significant	significant	ADJ
ispiv-39	32	45	impacts	impact	NOUN
ispiv-39	32	46	of	of	ADP
ispiv-39	32	47	rotor	rotor	NOUN
ispiv-39	32	48	interactions	interaction	NOUN
ispiv-39	32	49	on	on	ADP
ispiv-39	32	50	the	the	DET
ispiv-39	32	51	performances	performance	NOUN
ispiv-39	32	52	of	of	ADP
ispiv-39	32	53	small	small	ADJ
ispiv-39	32	54	uavs	uavs	NOUN
ispiv-39	32	55	,	,	PUNCT
ispiv-39	32	56	extensive	extensive	ADJ
ispiv-39	32	57	work	work	NOUN
ispiv-39	32	58	is	be	AUX
ispiv-39	32	59	still	still	ADV
ispiv-39	32	60	needed	need	VERB
ispiv-39	32	61	to	to	PART
ispiv-39	32	62	understand	understand	VERB
ispiv-39	32	63	the	the	DET
ispiv-39	32	64	underlying	underlie	VERB
ispiv-39	32	65	fluid	fluid	ADJ
ispiv-39	32	66	mechanics	mechanic	NOUN
ispiv-39	32	67	pertinent	pertinent	ADJ
ispiv-39	32	68	to	to	ADP
ispiv-39	32	69	multi	multi	ADJ
ispiv-39	32	70	-	-	ADJ
ispiv-39	32	71	rotor	rotor	ADJ
ispiv-39	32	72	interactions	interaction	NOUN
ispiv-39	32	73	,	,	PUNCT
ispiv-39	32	74	and	and	CCONJ
ispiv-39	32	75	to	to	PART
ispiv-39	32	76	uncover	uncover	VERB
ispiv-39	32	77	how	how	SCONJ
ispiv-39	32	78	rotor	rotor	NOUN
ispiv-39	32	79	-	-	PUNCT
ispiv-39	32	80	to	to	ADP
ispiv-39	32	81	-	-	PUNCT
ispiv-39	32	82	rotor	rotor	NOUN
ispiv-39	32	83	interactions	interaction	NOUN
ispiv-39	32	84	affect	affect	VERB
ispiv-39	32	85	the	the	DET
ispiv-39	32	86	aerodynamic	aerodynamic	ADJ
ispiv-39	32	87	and	and	CCONJ
ispiv-39	32	88	aeroacoustic	aeroacoustic	ADJ
ispiv-39	32	89	performances	performance	NOUN
ispiv-39	32	90	in	in	ADP
ispiv-39	32	91	small	small	ADJ
ispiv-39	32	92	uavs	uavs	NOUN
ispiv-39	32	93	.	.	PUNCT
ispiv-39	33	1	in	in	ADP
ispiv-39	33	2	the	the	DET
ispiv-39	33	3	present	present	ADJ
ispiv-39	33	4	study	study	NOUN
ispiv-39	33	5	,	,	PUNCT
ispiv-39	33	6	an	an	DET
ispiv-39	33	7	experimental	experimental	ADJ
ispiv-39	33	8	investigation	investigation	NOUN
ispiv-39	33	9	was	be	AUX
ispiv-39	33	10	performed	perform	VERB
ispiv-39	33	11	to	to	PART
ispiv-39	33	12	evaluate	evaluate	VERB
ispiv-39	33	13	the	the	DET
ispiv-39	33	14	rotor	rotor	NOUN
ispiv-39	33	15	interactions	interaction	NOUN
ispiv-39	33	16	on	on	ADP
ispiv-39	33	17	the	the	DET
ispiv-39	33	18	aerodynamic	aerodynamic	ADJ
ispiv-39	33	19	and	and	CCONJ
ispiv-39	33	20	aeroacoustic	aeroacoustic	ADJ
ispiv-39	33	21	performances	performance	NOUN
ispiv-39	33	22	of	of	ADP
ispiv-39	33	23	small	small	ADJ
ispiv-39	33	24	uavs	uavs	NOUN
ispiv-39	33	25	.	.	PUNCT
ispiv-39	34	1	two	two	NUM
ispiv-39	34	2	identical	identical	ADJ
ispiv-39	34	3	rotors	rotor	NOUN
ispiv-39	34	4	with	with	ADP
ispiv-39	34	5	counter	counter	ADJ
ispiv-39	34	6	-	-	ADJ
ispiv-39	34	7	rotating	rotate	VERB
ispiv-39	34	8	configuration	configuration	NOUN
ispiv-39	34	9	were	be	AUX
ispiv-39	34	10	mounted	mount	VERB
ispiv-39	34	11	separately	separately	ADV
ispiv-39	34	12	on	on	ADP
ispiv-39	34	13	two	two	NUM
ispiv-39	34	14	stages	stage	NOUN
ispiv-39	34	15	and	and	CCONJ
ispiv-39	34	16	arranged	arrange	VERB
ispiv-39	34	17	laterally	laterally	ADV
ispiv-39	34	18	in	in	ADP
ispiv-39	34	19	a	a	DET
ispiv-39	34	20	wide	wide	ADJ
ispiv-39	34	21	-	-	PUNCT
ispiv-39	34	22	open	open	ADJ
ispiv-39	34	23	space	space	NOUN
ispiv-39	34	24	.	.	PUNCT
ispiv-39	35	1	the	the	DET
ispiv-39	35	2	separation	separation	NOUN
ispiv-39	35	3	distance	distance	NOUN
ispiv-39	35	4	between	between	ADP
ispiv-39	35	5	rotors	rotor	NOUN
ispiv-39	35	6	was	be	AUX
ispiv-39	35	7	adjusted	adjust	VERB
ispiv-39	35	8	from	from	ADP
ispiv-39	35	9	l	l	NOUN
ispiv-39	35	10	=	=	PUNCT
ispiv-39	35	11	0.05d	0.05d	PROPN
ispiv-39	35	12	to	to	ADP
ispiv-39	35	13	l	l	NOUN
ispiv-39	35	14	=	=	SYM
ispiv-39	35	15	1.0d	1.0d	NOUN
ispiv-39	35	16	,	,	PUNCT
ispiv-39	35	17	which	which	PRON
ispiv-39	35	18	is	be	AUX
ispiv-39	35	19	0.04d	0.04d	PROPN
ispiv-39	35	20	for	for	ADP
ispiv-39	35	21	the	the	DET
ispiv-39	35	22	dji	dji	NOUN
ispiv-39	35	23	phantom	phantom	NOUN
ispiv-39	35	24	3	3	NUM
ispiv-39	35	25	.	.	PUNCT
ispiv-39	36	1	while	while	SCONJ
ispiv-39	36	2	high	high	ADJ
ispiv-39	36	3	-	-	PUNCT
ispiv-39	36	4	accuracy	accuracy	NOUN
ispiv-39	36	5	measurements	measurement	NOUN
ispiv-39	36	6	were	be	AUX
ispiv-39	36	7	conducted	conduct	VERB
ispiv-39	36	8	to	to	PART
ispiv-39	36	9	quantify	quantify	VERB
ispiv-39	36	10	the	the	DET
ispiv-39	36	11	thrust	thrust	NOUN
ispiv-39	36	12	and	and	CCONJ
ispiv-39	36	13	noise	noise	NOUN
ispiv-39	36	14	at	at	ADP
ispiv-39	36	15	various	various	ADJ
ispiv-39	36	16	separation	separation	NOUN
ispiv-39	36	17	distances	distance	NOUN
ispiv-39	36	18	,	,	PUNCT
ispiv-39	36	19	a	a	DET
ispiv-39	36	20	high	high	ADJ
ispiv-39	36	21	-	-	PUNCT
ispiv-39	36	22	resolution	resolution	NOUN
ispiv-39	36	23	piv	piv	NOUN
ispiv-39	36	24	system	system	NOUN
ispiv-39	36	25	was	be	AUX
ispiv-39	36	26	used	use	VERB
ispiv-39	36	27	to	to	PART
ispiv-39	36	28	capture	capture	VERB
ispiv-39	36	29	the	the	DET
ispiv-39	36	30	detailed	detailed	ADJ
ispiv-39	36	31	flow	flow	NOUN
ispiv-39	36	32	structures	structure	NOUN
ispiv-39	36	33	and	and	CCONJ
ispiv-39	36	34	the	the	DET
ispiv-39	36	35	corresponding	correspond	VERB
ispiv-39	36	36	vortex	vortex	NOUN
ispiv-39	36	37	evolutions	evolution	NOUN
ispiv-39	36	38	behind	behind	ADP
ispiv-39	36	39	the	the	DET
ispiv-39	36	40	rotor	rotor	NOUN
ispiv-39	36	41	.	.	PUNCT
ispiv-39	37	1	the	the	DET
ispiv-39	37	2	effects	effect	NOUN
ispiv-39	37	3	of	of	ADP
ispiv-39	37	4	rotors	rotor	NOUN
ispiv-39	37	5	separation	separation	NOUN
ispiv-39	37	6	distance	distance	NOUN
ispiv-39	37	7	(	(	PUNCT
ispiv-39	37	8	i.e.	i.e.	X
ispiv-39	37	9	,	,	PUNCT
ispiv-39	37	10	l	l	NOUN
ispiv-39	37	11	=	=	SYM
ispiv-39	37	12	0.05d	0.05d	PROPN
ispiv-39	37	13	,	,	PUNCT
ispiv-39	37	14	0.1d	0.1d	PROPN
ispiv-39	37	15	,	,	PUNCT
ispiv-39	37	16	0.2d	0.2d	NOUN
ispiv-39	37	17	,	,	PUNCT
ispiv-39	37	18	and	and	CCONJ
ispiv-39	37	19	1.0d	1.0d	NOUN
ispiv-39	37	20	)	)	PUNCT
ispiv-39	37	21	on	on	ADP
ispiv-39	37	22	the	the	DET
ispiv-39	37	23	aerodynamic	aerodynamic	ADJ
ispiv-39	37	24	and	and	CCONJ
ispiv-39	37	25	aeroacoustic	aeroacoustic	ADJ
ispiv-39	37	26	performances	performance	NOUN
ispiv-39	37	27	of	of	ADP
ispiv-39	37	28	the	the	DET
ispiv-39	37	29	uavs	uavs	NOUN
ispiv-39	37	30	were	be	AUX
ispiv-39	37	31	examined	examine	VERB
ispiv-39	37	32	comprehensively	comprehensively	ADV
ispiv-39	37	33	based	base	VERB
ispiv-39	37	34	on	on	ADP
ispiv-39	37	35	the	the	DET
ispiv-39	37	36	measured	measure	VERB
ispiv-39	37	37	results	result	NOUN
ispiv-39	37	38	.	.	PUNCT
ispiv-39	38	1	finally	finally	ADV
ispiv-39	38	2	,	,	PUNCT
ispiv-39	38	3	the	the	DET
ispiv-39	38	4	resolved	resolve	VERB
ispiv-39	38	5	flow	flow	NOUN
ispiv-39	38	6	fields	field	NOUN
ispiv-39	38	7	were	be	AUX
ispiv-39	38	8	correlated	correlate	VERB
ispiv-39	38	9	with	with	ADP
ispiv-39	38	10	the	the	DET
ispiv-39	38	11	measured	measure	VERB
ispiv-39	38	12	results	result	NOUN
ispiv-39	38	13	to	to	PART
ispiv-39	38	14	elucidate	elucidate	VERB
ispiv-39	38	15	the	the	DET
ispiv-39	38	16	underlying	underlie	VERB
ispiv-39	38	17	physics	physics	NOUN
ispiv-39	38	18	to	to	PART
ispiv-39	38	19	explore	explore	VERB
ispiv-39	38	20	/	/	SYM
ispiv-39	38	21	optimize	optimize	NOUN
ispiv-39	38	22	design	design	NOUN
ispiv-39	38	23	for	for	ADP
ispiv-39	38	24	next	next	ADJ
ispiv-39	38	25	generation	generation	NOUN
ispiv-39	38	26	multi	multi	ADJ
ispiv-39	38	27	-	-	ADJ
ispiv-39	38	28	rotor	rotor	ADJ
ispiv-39	38	29	drones	drone	NOUN
ispiv-39	38	30	.	.	PUNCT
ispiv-39	39	1	ii	ii	PROPN
ispiv-39	39	2	.	.	PUNCT
ispiv-39	39	3	test	test	NOUN
ispiv-39	39	4	model	model	NOUN
ispiv-39	39	5	and	and	CCONJ
ispiv-39	39	6	experimental	experimental	ADJ
ispiv-39	39	7	setups	setup	NOUN
ispiv-39	39	8	in	in	ADP
ispiv-39	39	9	the	the	DET
ispiv-39	39	10	present	present	ADJ
ispiv-39	39	11	study	study	NOUN
ispiv-39	39	12	,	,	PUNCT
ispiv-39	39	13	the	the	DET
ispiv-39	39	14	rotor	rotor	NOUN
ispiv-39	39	15	models	model	NOUN
ispiv-39	39	16	were	be	AUX
ispiv-39	39	17	made	make	VERB
ispiv-39	39	18	of	of	ADP
ispiv-39	39	19	hard	hard	ADJ
ispiv-39	39	20	plastic	plastic	NOUN
ispiv-39	39	21	material	material	NOUN
ispiv-39	39	22	and	and	CCONJ
ispiv-39	39	23	manufactured	manufacture	VERB
ispiv-39	39	24	by	by	ADP
ispiv-39	39	25	a	a	DET
ispiv-39	39	26	rapid	rapid	ADJ
ispiv-39	39	27	prototyping	prototyping	NOUN
ispiv-39	39	28	machine	machine	NOUN
ispiv-39	39	29	(	(	PUNCT
ispiv-39	39	30	i.e.	i.e.	X
ispiv-39	39	31	,	,	PUNCT
ispiv-39	39	32	3	3	NUM
ispiv-39	39	33	-	-	SYM
ispiv-39	39	34	d	d	NOUN
ispiv-39	39	35	printing	printing	NOUN
ispiv-39	39	36	)	)	PUNCT
ispiv-39	39	37	that	that	PRON
ispiv-39	39	38	built	build	VERB
ispiv-39	39	39	the	the	DET
ispiv-39	39	40	rotor	rotor	NOUN
ispiv-39	39	41	models	model	NOUN
ispiv-39	39	42	layer	layer	NOUN
ispiv-39	39	43	-	-	PUNCT
ispiv-39	39	44	by	by	ADP
ispiv-39	39	45	-	-	PUNCT
ispiv-39	39	46	layer	layer	NOUN
ispiv-39	39	47	with	with	ADP
ispiv-39	39	48	a	a	DET
ispiv-39	39	49	resolution	resolution	NOUN
ispiv-39	39	50	of	of	ADP
ispiv-39	39	51	about	about	ADV
ispiv-39	39	52	25	25	NUM
ispiv-39	39	53	microns	micron	NOUN
ispiv-39	39	54	.	.	PUNCT
ispiv-39	40	1	as	as	SCONJ
ispiv-39	40	2	shown	show	VERB
ispiv-39	40	3	schematically	schematically	NOUN
ispiv-39	40	4	in	in	ADP
ispiv-39	40	5	fig	fig	NOUN
ispiv-39	40	6	.	.	PUNCT
ispiv-39	41	1	1	1	NUM
ispiv-39	41	2	,	,	PUNCT
ispiv-39	41	3	the	the	DET
ispiv-39	41	4	rotor	rotor	NOUN
ispiv-39	41	5	has	have	VERB
ispiv-39	41	6	a	a	DET
ispiv-39	41	7	diameter	diameter	NOUN
ispiv-39	41	8	of	of	ADP
ispiv-39	41	9	240	240	NUM
ispiv-39	41	10	mm	mm	NOUN
ispiv-39	41	11	(	(	PUNCT
ispiv-39	41	12	d	d	NOUN
ispiv-39	41	13	=	=	SYM
ispiv-39	41	14	240	240	NUM
ispiv-39	41	15	mm	mm	NOUN
ispiv-39	41	16	)	)	PUNCT
ispiv-39	41	17	,	,	PUNCT
ispiv-39	41	18	which	which	PRON
ispiv-39	41	19	is	be	AUX
ispiv-39	41	20	close	close	ADJ
ispiv-39	41	21	to	to	ADP
ispiv-39	41	22	the	the	DET
ispiv-39	41	23	size	size	NOUN
ispiv-39	41	24	of	of	ADP
ispiv-39	41	25	phantom	phantom	ADJ
ispiv-39	41	26	3	3	NUM
ispiv-39	41	27	rotor	rotor	NOUN
ispiv-39	41	28	.	.	PUNCT
ispiv-39	42	1	an	an	DET
ispiv-39	42	2	e63	e63	NOUN
ispiv-39	42	3	airfoil	airfoil	NOUN
ispiv-39	42	4	profile	profile	NOUN
ispiv-39	42	5	was	be	AUX
ispiv-39	42	6	selected	select	VERB
ispiv-39	42	7	to	to	PART
ispiv-39	42	8	generate	generate	VERB
ispiv-39	42	9	the	the	DET
ispiv-39	42	10	rotor	rotor	NOUN
ispiv-39	42	11	blade	blade	NOUN
ispiv-39	42	12	due	due	ADP
ispiv-39	42	13	to	to	ADP
ispiv-39	42	14	its	its	PRON
ispiv-39	42	15	high	high	ADJ
ispiv-39	42	16	lift	lift	NOUN
ispiv-39	42	17	to	to	PART
ispiv-39	42	18	drag	drag	VERB
ispiv-39	42	19	ratio	ratio	NOUN
ispiv-39	42	20	at	at	ADP
ispiv-39	42	21	low	low	ADJ
ispiv-39	42	22	reynolds	reynolds	PROPN
ispiv-39	42	23	numbers	number	NOUN
ispiv-39	42	24	.	.	PUNCT
ispiv-39	43	1	the	the	DET
ispiv-39	43	2	printed	print	VERB
ispiv-39	43	3	rotor	rotor	NOUN
ispiv-39	43	4	was	be	AUX
ispiv-39	43	5	able	able	ADJ
ispiv-39	43	6	to	to	PART
ispiv-39	43	7	provide	provide	VERB
ispiv-39	43	8	3.0	3.0	NUM
ispiv-39	43	9	newton	newton	NOUN
ispiv-39	43	10	thrust	thrust	NOUN
ispiv-39	43	11	at	at	ADP
ispiv-39	43	12	a	a	DET
ispiv-39	43	13	rotation	rotation	NOUN
ispiv-39	43	14	speed	speed	NOUN
ispiv-39	43	15	of	of	ADP
ispiv-39	43	16	4860	4860	NUM
ispiv-39	43	17	rpm	rpm	NOUN
ispiv-39	43	18	.	.	PUNCT
ispiv-39	44	1	while	while	SCONJ
ispiv-39	44	2	the	the	DET
ispiv-39	44	3	chord	chord	NOUN
ispiv-39	44	4	length	length	NOUN
ispiv-39	44	5	of	of	ADP
ispiv-39	44	6	the	the	DET
ispiv-39	44	7	rotor	rotor	NOUN
ispiv-39	44	8	blade	blade	NOUN
ispiv-39	44	9	was	be	AUX
ispiv-39	44	10	set	set	VERB
ispiv-39	44	11	to	to	ADP
ispiv-39	44	12	11	11	NUM
ispiv-39	44	13	mm	mm	NOUN
ispiv-39	44	14	at	at	ADP
ispiv-39	44	15	the	the	DET
ispiv-39	44	16	tip	tip	NOUN
ispiv-39	44	17	,	,	PUNCT
ispiv-39	44	18	as	as	ADP
ispiv-39	44	19	for	for	ADP
ispiv-39	44	20	other	other	ADJ
ispiv-39	44	21	locations	location	NOUN
ispiv-39	44	22	(	(	PUNCT
ispiv-39	44	23	i.e.	i.e.	X
ispiv-39	44	24	,	,	PUNCT
ispiv-39	44	25	from	from	ADP
ispiv-39	44	26	tip	tip	NOUN
ispiv-39	44	27	to	to	ADP
ispiv-39	44	28	30	30	NUM
ispiv-39	44	29	%	%	NOUN
ispiv-39	44	30	of	of	ADP
ispiv-39	44	31	the	the	DET
ispiv-39	44	32	blade	blade	NOUN
ispiv-39	44	33	)	)	PUNCT
ispiv-39	44	34	,	,	PUNCT
ispiv-39	44	35	they	they	PRON
ispiv-39	44	36	were	be	AUX
ispiv-39	44	37	determined	determine	VERB
ispiv-39	44	38	by	by	ADP
ispiv-39	44	39	the	the	DET
ispiv-39	44	40	optimal	optimal	ADJ
ispiv-39	44	41	chord	chord	NOUN
ispiv-39	44	42	length	length	NOUN
ispiv-39	44	43	equation	equation	NOUN
ispiv-39	44	44	𝐶𝑟	𝐶𝑟	PROPN
ispiv-39	44	45	=	=	PUNCT
ispiv-39	44	46	𝐶𝑡𝑖𝑝	𝐶𝑡𝑖𝑝	PROPN
ispiv-39	44	47	𝑟	𝑟	NOUN
ispiv-39	44	48	,	,	PUNCT
ispiv-39	44	49	where	where	SCONJ
ispiv-39	44	50	ctip	ctip	NOUN
ispiv-39	44	51	is	be	AUX
ispiv-39	44	52	the	the	DET
ispiv-39	44	53	chord	chord	ADJ
ispiv-39	44	54	length	length	NOUN
ispiv-39	44	55	at	at	ADP
ispiv-39	44	56	the	the	DET
ispiv-39	44	57	tip	tip	NOUN
ispiv-39	44	58	,	,	PUNCT
ispiv-39	44	59	and	and	CCONJ
ispiv-39	44	60	r	r	NOUN
ispiv-39	44	61	is	be	AUX
ispiv-39	44	62	a	a	DET
ispiv-39	44	63	non	non	ADJ
ispiv-39	44	64	-	-	ADJ
ispiv-39	44	65	dimensional	dimensional	ADJ
ispiv-39	44	66	radius	radius	NOUN
ispiv-39	44	67	(	(	PUNCT
ispiv-39	44	68	i.e.	i.e.	X
ispiv-39	44	69	,	,	PUNCT
ispiv-39	44	70	0.3	0.3	NUM
ispiv-39	44	71	at	at	ADP
ispiv-39	44	72	30	30	NUM
ispiv-39	44	73	%	%	NOUN
ispiv-39	44	74	of	of	ADP
ispiv-39	44	75	the	the	DET
ispiv-39	44	76	blade	blade	NOUN
ispiv-39	44	77	and	and	CCONJ
ispiv-39	44	78	one	one	NUM
ispiv-39	44	79	at	at	ADP
ispiv-39	44	80	the	the	DET
ispiv-39	44	81	tip	tip	NOUN
ispiv-39	44	82	)	)	PUNCT
ispiv-39	44	83	.	.	PUNCT
ispiv-39	45	1	the	the	DET
ispiv-39	45	2	root	root	NOUN
ispiv-39	45	3	section	section	NOUN
ispiv-39	45	4	(	(	PUNCT
ispiv-39	45	5	i.e.	i.e.	X
ispiv-39	45	6	,	,	PUNCT
ispiv-39	45	7	from	from	ADP
ispiv-39	45	8	30	30	NUM
ispiv-39	45	9	%	%	NOUN
ispiv-39	45	10	to	to	PART
ispiv-39	45	11	5	5	NUM
ispiv-39	45	12	%	%	NOUN
ispiv-39	45	13	of	of	ADP
ispiv-39	45	14	the	the	DET
ispiv-39	45	15	blade	blade	NOUN
ispiv-39	45	16	)	)	PUNCT
ispiv-39	45	17	is	be	AUX
ispiv-39	45	18	considered	consider	VERB
ispiv-39	45	19	as	as	ADP
ispiv-39	45	20	support	support	NOUN
ispiv-39	45	21	part	part	NOUN
ispiv-39	45	22	,	,	PUNCT
ispiv-39	45	23	which	which	PRON
ispiv-39	45	24	transits	transit	VERB
ispiv-39	45	25	smoothly	smoothly	ADV
ispiv-39	45	26	from	from	ADP
ispiv-39	45	27	the	the	DET
ispiv-39	45	28	30	30	NUM
ispiv-39	45	29	%	%	NOUN
ispiv-39	45	30	chord	chord	NOUN
ispiv-39	45	31	section	section	NOUN
ispiv-39	45	32	to	to	ADP
ispiv-39	45	33	the	the	DET
ispiv-39	45	34	5	5	NUM
ispiv-39	45	35	%	%	NOUN
ispiv-39	45	36	chord	chord	NOUN
ispiv-39	45	37	section	section	NOUN
ispiv-39	45	38	.	.	PUNCT
ispiv-39	46	1	it	it	PRON
ispiv-39	46	2	should	should	AUX
ispiv-39	46	3	also	also	ADV
ispiv-39	46	4	be	be	AUX
ispiv-39	46	5	noted	note	VERB
ispiv-39	46	6	that	that	SCONJ
ispiv-39	46	7	the	the	DET
ispiv-39	46	8	twist	twist	ADJ
ispiv-39	46	9	angle	angle	NOUN
ispiv-39	46	10	of	of	ADP
ispiv-39	46	11	the	the	DET
ispiv-39	46	12	blade	blade	NOUN
ispiv-39	46	13	from	from	ADP
ispiv-39	46	14	the	the	DET
ispiv-39	46	15	tip	tip	NOUN
ispiv-39	46	16	to	to	ADP
ispiv-39	46	17	30	30	NUM
ispiv-39	46	18	%	%	NOUN
ispiv-39	46	19	of	of	ADP
ispiv-39	46	20	the	the	DET
ispiv-39	46	21	blade	blade	NOUN
ispiv-39	46	22	was	be	AUX
ispiv-39	46	23	adjusted	adjust	VERB
ispiv-39	46	24	from	from	ADP
ispiv-39	46	25	11.6	11.6	NUM
ispiv-39	46	26	°	°	NOUN
ispiv-39	46	27	to	to	ADP
ispiv-39	46	28	26.3	26.3	NUM
ispiv-39	46	29	°	°	NOUN
ispiv-39	46	30	,	,	PUNCT
ispiv-39	46	31	and	and	CCONJ
ispiv-39	46	32	the	the	DET
ispiv-39	46	33	solidity	solidity	NOUN
ispiv-39	46	34	of	of	ADP
ispiv-39	46	35	the	the	DET
ispiv-39	46	36	rotor	rotor	NOUN
ispiv-39	46	37	blade	blade	NOUN
ispiv-39	46	38	was	be	AUX
ispiv-39	46	39	0.12	0.12	NUM
ispiv-39	46	40	in	in	ADP
ispiv-39	46	41	the	the	DET
ispiv-39	46	42	present	present	ADJ
ispiv-39	46	43	study	study	NOUN
ispiv-39	46	44	.	.	PUNCT
ispiv-39	47	1	the	the	DET
ispiv-39	47	2	rotor	rotor	NOUN
ispiv-39	47	3	models	model	NOUN
ispiv-39	47	4	,	,	PUNCT
ispiv-39	47	5	oriented	orient	VERB
ispiv-39	47	6	horizontally	horizontally	ADV
ispiv-39	47	7	,	,	PUNCT
ispiv-39	47	8	were	be	AUX
ispiv-39	47	9	installed	instal	VERB
ispiv-39	47	10	~300	~300	NUM
ispiv-39	47	11	mm	mm	NOUN
ispiv-39	47	12	above	above	ADP
ispiv-39	47	13	the	the	DET
ispiv-39	47	14	test	test	NOUN
ispiv-39	47	15	stage	stage	NOUN
ispiv-39	47	16	.	.	PUNCT
ispiv-39	48	1	the	the	DET
ispiv-39	48	2	experiment	experiment	NOUN
ispiv-39	48	3	stage	stage	NOUN
ispiv-39	48	4	was	be	AUX
ispiv-39	48	5	~400	~400	NOUN
ispiv-39	48	6	mm	mm	PROPN
ispiv-39	48	7	above	above	ADP
ispiv-39	48	8	the	the	DET
ispiv-39	48	9	ground	ground	NOUN
ispiv-39	48	10	,	,	PUNCT
ispiv-39	48	11	therefore	therefore	ADV
ispiv-39	48	12	it	it	PRON
ispiv-39	48	13	is	be	AUX
ispiv-39	48	14	reasonable	reasonable	ADJ
ispiv-39	48	15	to	to	PART
ispiv-39	48	16	neglect	neglect	VERB
ispiv-39	48	17	any	any	DET
ispiv-39	48	18	rotor	rotor	NOUN
ispiv-39	48	19	induced	induce	VERB
ispiv-39	48	20	secondary	secondary	ADJ
ispiv-39	48	21	flow	flow	NOUN
ispiv-39	48	22	effect	effect	NOUN
ispiv-39	48	23	on	on	ADP
ispiv-39	48	24	the	the	DET
ispiv-39	48	25	test	test	NOUN
ispiv-39	48	26	measurements	measurement	NOUN
ispiv-39	48	27	.	.	PUNCT
ispiv-39	49	1	figure	figure	VERB
ispiv-39	49	2	1	1	NUM
ispiv-39	49	3	.	.	PUNCT
ispiv-39	49	4	schematic	schematic	ADJ
ispiv-39	49	5	of	of	ADP
ispiv-39	49	6	rotor	rotor	NOUN
ispiv-39	49	7	model	model	NOUN
ispiv-39	49	8	used	use	VERB
ispiv-39	49	9	in	in	ADP
ispiv-39	49	10	the	the	DET
ispiv-39	49	11	present	present	ADJ
ispiv-39	49	12	study	study	NOUN
ispiv-39	49	13	.	.	PUNCT
ispiv-39	50	1	the	the	DET
ispiv-39	50	2	experimental	experimental	ADJ
ispiv-39	50	3	study	study	NOUN
ispiv-39	50	4	was	be	AUX
ispiv-39	50	5	performed	perform	VERB
ispiv-39	50	6	in	in	ADP
ispiv-39	50	7	the	the	DET
ispiv-39	50	8	advanced	advanced	ADJ
ispiv-39	50	9	flow	flow	NOUN
ispiv-39	50	10	diagnostic	diagnostic	ADJ
ispiv-39	50	11	and	and	CCONJ
ispiv-39	50	12	experimental	experimental	ADJ
ispiv-39	50	13	aerodynamic	aerodynamic	ADJ
ispiv-39	50	14	laboratory	laboratory	NOUN
ispiv-39	50	15	located	locate	VERB
ispiv-39	50	16	at	at	ADP
ispiv-39	50	17	iowa	iowa	PROPN
ispiv-39	50	18	state	state	PROPN
ispiv-39	50	19	university	university	PROPN
ispiv-39	50	20	.	.	PUNCT
ispiv-39	51	1	figure	figure	NOUN
ispiv-39	51	2	2	2	NUM
ispiv-39	51	3	(	(	PUNCT
ispiv-39	51	4	a	a	NOUN
ispiv-39	51	5	)	)	PUNCT
ispiv-39	51	6	shows	show	VERB
ispiv-39	51	7	the	the	DET
ispiv-39	51	8	experimental	experimental	ADJ
ispiv-39	51	9	setup	setup	NOUN
ispiv-39	51	10	used	use	VERB
ispiv-39	51	11	for	for	ADP
ispiv-39	51	12	the	the	DET
ispiv-39	51	13	dynamic	dynamic	ADJ
ispiv-39	51	14	thrust	thrust	NOUN
ispiv-39	51	15	and	and	CCONJ
ispiv-39	51	16	particle	particle	NOUN
ispiv-39	51	17	image	image	NOUN
ispiv-39	51	18	velocimetry	velocimetry	NOUN
ispiv-39	51	19	(	(	PUNCT
ispiv-39	51	20	piv	piv	NOUN
ispiv-39	51	21	)	)	PUNCT
ispiv-39	51	22	measurements	measurement	NOUN
ispiv-39	51	23	in	in	ADP
ispiv-39	51	24	the	the	DET
ispiv-39	51	25	present	present	ADJ
ispiv-39	51	26	study	study	NOUN
ispiv-39	51	27	,	,	PUNCT
ispiv-39	51	28	where	where	SCONJ
ispiv-39	51	29	the	the	DET
ispiv-39	51	30	main	main	ADJ
ispiv-39	51	31	test	test	NOUN
ispiv-39	51	32	rig	rig	NOUN
ispiv-39	51	33	is	be	AUX
ispiv-39	51	34	a	a	DET
ispiv-39	51	35	custom	custom	ADV
ispiv-39	51	36	-	-	PUNCT
ispiv-39	51	37	built	build	VERB
ispiv-39	51	38	8020	8020	NUM
ispiv-39	51	39	alumina	alumina	NOUN
ispiv-39	51	40	stage	stage	NOUN
ispiv-39	51	41	.	.	PUNCT
ispiv-39	52	1	equipped	equip	VERB
ispiv-39	52	2	with	with	ADP
ispiv-39	52	3	two	two	NUM
ispiv-39	52	4	identical	identical	ADJ
ispiv-39	52	5	rotors	rotor	NOUN
ispiv-39	52	6	,	,	PUNCT
ispiv-39	52	7	the	the	DET
ispiv-39	52	8	propellers	propeller	NOUN
ispiv-39	52	9	in	in	ADP
ispiv-39	52	10	twin	twin	ADJ
ispiv-39	52	11	-	-	PUNCT
ispiv-39	52	12	rotor	rotor	NOUN
ispiv-39	52	13	case	case	NOUN
ispiv-39	52	14	were	be	AUX
ispiv-39	52	15	rotated	rotate	VERB
ispiv-39	52	16	in	in	ADP
ispiv-39	52	17	opposite	opposite	ADJ
ispiv-39	52	18	directions	direction	NOUN
ispiv-39	52	19	(	(	PUNCT
ispiv-39	52	20	i.e.	i.e.	X
ispiv-39	52	21	,	,	PUNCT
ispiv-39	52	22	counterrotating	counterrotating	NOUN
ispiv-39	52	23	)	)	PUNCT
ispiv-39	52	24	.	.	PUNCT
ispiv-39	53	1	their	their	PRON
ispiv-39	53	2	rotational	rotational	ADJ
ispiv-39	53	3	speeds	speed	NOUN
ispiv-39	53	4	were	be	AUX
ispiv-39	53	5	controlled	control	VERB
ispiv-39	53	6	separately	separately	ADV
ispiv-39	53	7	by	by	ADP
ispiv-39	53	8	electronic	electronic	ADJ
ispiv-39	53	9	speed	speed	NOUN
ispiv-39	53	10	control	control	NOUN
ispiv-39	53	11	.	.	PUNCT
ispiv-39	54	1	the	the	DET
ispiv-39	54	2	baseline	baseline	PROPN
ispiv-39	54	3	case	case	NOUN
ispiv-39	54	4	was	be	AUX
ispiv-39	54	5	simply	simply	ADV
ispiv-39	54	6	achieved	achieve	VERB
ispiv-39	54	7	by	by	ADP
ispiv-39	54	8	removing	remove	VERB
ispiv-39	54	9	an	an	DET
ispiv-39	54	10	identical	identical	ADJ
ispiv-39	54	11	rotor	rotor	NOUN
ispiv-39	54	12	from	from	ADP
ispiv-39	54	13	the	the	DET
ispiv-39	54	14	twin	twin	ADJ
ispiv-39	54	15	-	-	PUNCT
ispiv-39	54	16	rotor	rotor	NOUN
ispiv-39	54	17	configuration	configuration	NOUN
ispiv-39	54	18	.	.	PUNCT
ispiv-39	55	1	comparisons	comparison	NOUN
ispiv-39	55	2	were	be	AUX
ispiv-39	55	3	made	make	VERB
ispiv-39	55	4	between	between	ADP
ispiv-39	55	5	the	the	DET
ispiv-39	55	6	twin	twin	ADJ
ispiv-39	55	7	-	-	PUNCT
ispiv-39	55	8	rotor	rotor	NOUN
ispiv-39	55	9	and	and	CCONJ
ispiv-39	55	10	baseline	baseline	NOUN
ispiv-39	55	11	cases	case	NOUN
ispiv-39	55	12	to	to	PART
ispiv-39	55	13	quantify	quantify	VERB
ispiv-39	55	14	the	the	DET
ispiv-39	55	15	effect	effect	NOUN
ispiv-39	55	16	of	of	ADP
ispiv-39	55	17	flow	flow	NOUN
ispiv-39	55	18	interactions	interaction	NOUN
ispiv-39	55	19	on	on	ADP
ispiv-39	55	20	the	the	DET
ispiv-39	55	21	thrust	thrust	ADJ
ispiv-39	55	22	performance	performance	NOUN
ispiv-39	55	23	of	of	ADP
ispiv-39	55	24	the	the	DET
ispiv-39	55	25	uav	uav	PROPN
ispiv-39	55	26	rotor	rotor	NOUN
ispiv-39	55	27	.	.	PUNCT
ispiv-39	56	1	as	as	SCONJ
ispiv-39	56	2	shown	show	VERB
ispiv-39	56	3	schematically	schematically	NOUN
ispiv-39	56	4	in	in	ADP
ispiv-39	56	5	fig	fig	NOUN
ispiv-39	56	6	.	.	PUNCT
ispiv-39	57	1	2	2	NUM
ispiv-39	57	2	(	(	PUNCT
ispiv-39	57	3	a	a	NOUN
ispiv-39	57	4	)	)	PUNCT
ispiv-39	57	5	,	,	PUNCT
ispiv-39	57	6	a	a	DET
ispiv-39	57	7	16	16	NUM
ispiv-39	57	8	mm	mm	NOUN
ispiv-39	57	9	aluminum	aluminum	NOUN
ispiv-39	57	10	rod	rod	NOUN
ispiv-39	57	11	was	be	AUX
ispiv-39	57	12	connected	connect	VERB
ispiv-39	57	13	to	to	ADP
ispiv-39	57	14	a	a	DET
ispiv-39	57	15	high	high	ADJ
ispiv-39	57	16	-	-	PUNCT
ispiv-39	57	17	sensitivity	sensitivity	NOUN
ispiv-39	57	18	force	force	NOUN
ispiv-39	57	19	-	-	PUNCT
ispiv-39	57	20	moment	moment	NOUN
ispiv-39	57	21	sensor	sensor	NOUN
ispiv-39	57	22	(	(	PUNCT
ispiv-39	57	23	jr3	jr3	ADJ
ispiv-39	57	24	load	load	NOUN
ispiv-39	57	25	cell	cell	NOUN
ispiv-39	57	26	,	,	PUNCT
ispiv-39	57	27	model	model	NOUN
ispiv-39	57	28	30e12a	30e12a	PROPN
ispiv-39	57	29	-	-	PUNCT
ispiv-39	57	30	i40	i40	NOUN
ispiv-39	57	31	)	)	PUNCT
ispiv-39	57	32	to	to	PART
ispiv-39	57	33	measure	measure	VERB
ispiv-39	57	34	the	the	DET
ispiv-39	57	35	dynamic	dynamic	ADJ
ispiv-39	57	36	thrusts	thrust	NOUN
ispiv-39	57	37	of	of	ADP
ispiv-39	57	38	a	a	DET
ispiv-39	57	39	single	single	ADJ
ispiv-39	57	40	rotor	rotor	NOUN
ispiv-39	57	41	.	.	PUNCT
ispiv-39	58	1	the	the	DET
ispiv-39	58	2	jr3	jr3	PROPN
ispiv-39	58	3	load	load	NOUN
ispiv-39	58	4	cell	cell	NOUN
ispiv-39	58	5	,	,	PUNCT
ispiv-39	58	6	which	which	PRON
ispiv-39	58	7	is	be	AUX
ispiv-39	58	8	composed	compose	VERB
ispiv-39	58	9	of	of	ADP
ispiv-39	58	10	foil	foil	NOUN
ispiv-39	58	11	strain	strain	NOUN
ispiv-39	58	12	gage	gage	NOUN
ispiv-39	58	13	bridges	bridge	NOUN
ispiv-39	58	14	,	,	PUNCT
ispiv-39	58	15	can	can	AUX
ispiv-39	58	16	measure	measure	VERB
ispiv-39	58	17	the	the	DET
ispiv-39	58	18	forces	force	NOUN
ispiv-39	58	19	and	and	CCONJ
ispiv-39	58	20	moments	moment	NOUN
ispiv-39	58	21	on	on	ADP
ispiv-39	58	22	all	all	DET
ispiv-39	58	23	three	three	NUM
ispiv-39	58	24	orthogonal	orthogonal	ADJ
ispiv-39	58	25	axes	axis	NOUN
ispiv-39	58	26	.	.	PUNCT
ispiv-39	59	1	the	the	DET
ispiv-39	59	2	precision	precision	NOUN
ispiv-39	59	3	for	for	ADP
ispiv-39	59	4	force	force	NOUN
ispiv-39	59	5	measurements	measurement	NOUN
ispiv-39	59	6	is	be	AUX
ispiv-39	59	7	within	within	ADP
ispiv-39	59	8	±0.25	±0.25	PROPN
ispiv-39	59	9	%	%	NOUN
ispiv-39	59	10	for	for	ADP
ispiv-39	59	11	the	the	DET
ispiv-39	59	12	full	full	ADJ
ispiv-39	59	13	range	range	NOUN
ispiv-39	59	14	(	(	PUNCT
ispiv-39	59	15	40	40	NUM
ispiv-39	59	16	n	n	CCONJ
ispiv-39	59	17	)	)	PUNCT
ispiv-39	59	18	.	.	PUNCT
ispiv-39	60	1	note	note	VERB
ispiv-39	60	2	that	that	SCONJ
ispiv-39	60	3	the	the	DET
ispiv-39	60	4	twin	twin	ADJ
ispiv-39	60	5	rotors	rotor	NOUN
ispiv-39	60	6	were	be	AUX
ispiv-39	60	7	mounted	mount	VERB
ispiv-39	60	8	on	on	ADP
ispiv-39	60	9	two	two	NUM
ispiv-39	60	10	separate	separate	ADJ
ispiv-39	60	11	stages	stage	NOUN
ispiv-39	60	12	in	in	ADP
ispiv-39	60	13	order	order	NOUN
ispiv-39	60	14	to	to	PART
ispiv-39	60	15	eliminate	eliminate	VERB
ispiv-39	60	16	the	the	DET
ispiv-39	60	17	induced	induced	ADJ
ispiv-39	60	18	mechanical	mechanical	ADJ
ispiv-39	60	19	vibration	vibration	NOUN
ispiv-39	60	20	from	from	ADP
ispiv-39	60	21	the	the	DET
ispiv-39	60	22	nearby	nearby	ADJ
ispiv-39	60	23	rotor	rotor	NOUN
ispiv-39	60	24	.	.	PUNCT
ispiv-39	61	1	during	during	ADP
ispiv-39	61	2	the	the	DET
ispiv-39	61	3	experiment	experiment	NOUN
ispiv-39	61	4	,	,	PUNCT
ispiv-39	61	5	the	the	DET
ispiv-39	61	6	separation	separation	NOUN
ispiv-39	61	7	distance	distance	NOUN
ispiv-39	61	8	(	(	PUNCT
ispiv-39	61	9	l	l	NOUN
ispiv-39	61	10	)	)	PUNCT
ispiv-39	61	11	between	between	ADP
ispiv-39	61	12	rotor	rotor	NOUN
ispiv-39	61	13	tips	tip	NOUN
ispiv-39	61	14	was	be	AUX
ispiv-39	61	15	varied	varied	ADJ
ispiv-39	61	16	from	from	ADP
ispiv-39	61	17	0.05d	0.05d	PROPN
ispiv-39	61	18	to	to	ADP
ispiv-39	61	19	1.0d	1.0d	NOUN
ispiv-39	61	20	to	to	PART
ispiv-39	61	21	study	study	VERB
ispiv-39	61	22	the	the	DET
ispiv-39	61	23	rotor	rotor	NOUN
ispiv-39	61	24	interactions	interaction	NOUN
ispiv-39	61	25	on	on	ADP
ispiv-39	61	26	the	the	DET
ispiv-39	61	27	aerodynamic	aerodynamic	ADJ
ispiv-39	61	28	and	and	CCONJ
ispiv-39	61	29	aeroacoustic	aeroacoustic	ADJ
ispiv-39	61	30	performances	performance	NOUN
ispiv-39	61	31	of	of	ADP
ispiv-39	61	32	uav	uav	PROPN
ispiv-39	61	33	rotors	rotor	NOUN
ispiv-39	61	34	.	.	PUNCT
ispiv-39	62	1	the	the	DET
ispiv-39	62	2	jr3	jr3	PROPN
ispiv-39	62	3	was	be	AUX
ispiv-39	62	4	used	use	VERB
ispiv-39	62	5	to	to	PART
ispiv-39	62	6	quantify	quantify	VERB
ispiv-39	62	7	the	the	DET
ispiv-39	62	8	dynamic	dynamic	ADJ
ispiv-39	62	9	load	load	NOUN
ispiv-39	62	10	acting	act	VERB
ispiv-39	62	11	on	on	ADP
ispiv-39	62	12	the	the	DET
ispiv-39	62	13	rotors	rotor	NOUN
ispiv-39	62	14	,	,	PUNCT
ispiv-39	62	15	which	which	PRON
ispiv-39	62	16	was	be	AUX
ispiv-39	62	17	acquired	acquire	VERB
ispiv-39	62	18	at	at	ADP
ispiv-39	62	19	a	a	DET
ispiv-39	62	20	sampling	sample	VERB
ispiv-39	62	21	rate	rate	NOUN
ispiv-39	62	22	of	of	ADP
ispiv-39	62	23	3000	3000	NUM
ispiv-39	62	24	hz	hz	VERB
ispiv-39	62	25	for	for	ADP
ispiv-39	62	26	120s	120s	PROPN
ispiv-39	62	27	.	.	PUNCT
ispiv-39	63	1	the	the	DET
ispiv-39	63	2	rotor	rotor	NOUN
ispiv-39	63	3	rotational	rotational	ADJ
ispiv-39	63	4	speed	speed	NOUN
ispiv-39	63	5	was	be	AUX
ispiv-39	63	6	monitored	monitor	VERB
ispiv-39	63	7	by	by	ADP
ispiv-39	63	8	a	a	DET
ispiv-39	63	9	monarch	monarch	NOUN
ispiv-39	63	10	instrument	instrument	NOUN
ispiv-39	63	11	tachometer	tachometer	NOUN
ispiv-39	63	12	.	.	PUNCT
ispiv-39	64	1	as	as	SCONJ
ispiv-39	64	2	shown	show	VERB
ispiv-39	64	3	schematically	schematically	NOUN
ispiv-39	64	4	in	in	ADP
ispiv-39	64	5	fig	fig	NOUN
ispiv-39	64	6	.	.	PUNCT
ispiv-39	65	1	2	2	NUM
ispiv-39	65	2	(	(	PUNCT
ispiv-39	65	3	b	b	NOUN
ispiv-39	65	4	)	)	PUNCT
ispiv-39	65	5	,	,	PUNCT
ispiv-39	65	6	an	an	DET
ispiv-39	65	7	aeroacoustic	aeroacoustic	ADJ
ispiv-39	65	8	noise	noise	NOUN
ispiv-39	65	9	measurement	measurement	NOUN
ispiv-39	65	10	was	be	AUX
ispiv-39	65	11	performed	perform	VERB
ispiv-39	65	12	in	in	ADP
ispiv-39	65	13	an	an	DET
ispiv-39	65	14	anechoic	anechoic	ADJ
ispiv-39	65	15	chamber	chamber	NOUN
ispiv-39	65	16	.	.	PUNCT
ispiv-39	66	1	this	this	DET
ispiv-39	66	2	chamber	chamber	NOUN
ispiv-39	66	3	has	have	VERB
ispiv-39	66	4	a	a	DET
ispiv-39	66	5	physical	physical	ADJ
ispiv-39	66	6	dimension	dimension	NOUN
ispiv-39	66	7	of	of	ADP
ispiv-39	66	8	12×12×9	12×12×9	NUM
ispiv-39	66	9	feet	foot	NOUN
ispiv-39	66	10	and	and	CCONJ
ispiv-39	66	11	its	its	PRON
ispiv-39	66	12	background	background	NOUN
ispiv-39	66	13	noise	noise	NOUN
ispiv-39	66	14	level	level	NOUN
ispiv-39	66	15	is	be	AUX
ispiv-39	66	16	lower	low	ADJ
ispiv-39	66	17	than	than	ADP
ispiv-39	66	18	20db	20db	ADJ
ispiv-39	66	19	with	with	ADP
ispiv-39	66	20	respect	respect	NOUN
ispiv-39	66	21	to	to	ADP
ispiv-39	66	22	the	the	DET
ispiv-39	66	23	reference	reference	NOUN
ispiv-39	66	24	pressure	pressure	NOUN
ispiv-39	66	25	of	of	ADP
ispiv-39	66	26	20	20	NUM
ispiv-39	66	27	µpa	µpa	NOUN
ispiv-39	66	28	.	.	PUNCT
ispiv-39	67	1	during	during	ADP
ispiv-39	67	2	the	the	DET
ispiv-39	67	3	experiment	experiment	NOUN
ispiv-39	67	4	,	,	PUNCT
ispiv-39	67	5	the	the	DET
ispiv-39	67	6	microphone	microphone	NOUN
ispiv-39	67	7	was	be	AUX
ispiv-39	67	8	installed	instal	VERB
ispiv-39	67	9	6d	6d	NUM
ispiv-39	67	10	away	away	ADV
ispiv-39	67	11	from	from	ADP
ispiv-39	67	12	the	the	DET
ispiv-39	67	13	center	center	NOUN
ispiv-39	67	14	point	point	NOUN
ispiv-39	67	15	o	o	NOUN
ispiv-39	67	16	of	of	ADP
ispiv-39	67	17	the	the	DET
ispiv-39	67	18	twin	twin	ADJ
ispiv-39	67	19	-	-	PUNCT
ispiv-39	67	20	rotor	rotor	NOUN
ispiv-39	67	21	system	system	NOUN
ispiv-39	67	22	.	.	PUNCT
ispiv-39	68	1	the	the	DET
ispiv-39	68	2	noise	noise	NOUN
ispiv-39	68	3	measurement	measurement	NOUN
ispiv-39	68	4	was	be	AUX
ispiv-39	68	5	performed	perform	VERB
ispiv-39	68	6	at	at	ADP
ispiv-39	68	7	5	5	NUM
ispiv-39	68	8	different	different	ADJ
ispiv-39	68	9	angular	angular	ADJ
ispiv-39	68	10	positions	position	NOUN
ispiv-39	68	11	with	with	ADP
ispiv-39	68	12	every	every	DET
ispiv-39	68	13	30	30	NUM
ispiv-39	68	14	◦	◦	NOUN
ispiv-39	68	15	interval	interval	NOUN
ispiv-39	68	16	,	,	PUNCT
ispiv-39	68	17	starting	start	VERB
ispiv-39	68	18	from	from	ADP
ispiv-39	68	19	the	the	DET
ispiv-39	68	20	front	front	ADJ
ispiv-39	68	21	position	position	NOUN
ispiv-39	68	22	of	of	ADP
ispiv-39	68	23	twin	twin	ADJ
ispiv-39	68	24	-	-	PUNCT
ispiv-39	68	25	rotor	rotor	NOUN
ispiv-39	68	26	to	to	PART
ispiv-39	68	27	30	30	NUM
ispiv-39	68	28	◦	◦	NOUN
ispiv-39	68	29	behind	behind	ADP
ispiv-39	68	30	the	the	DET
ispiv-39	68	31	rotors	rotor	NOUN
ispiv-39	68	32	.	.	PUNCT
ispiv-39	69	1	all	all	DET
ispiv-39	69	2	noise	noise	NOUN
ispiv-39	69	3	measurements	measurement	NOUN
ispiv-39	69	4	were	be	AUX
ispiv-39	69	5	performed	perform	VERB
ispiv-39	69	6	at	at	ADP
ispiv-39	69	7	the	the	DET
ispiv-39	69	8	height	height	NOUN
ispiv-39	69	9	of	of	ADP
ispiv-39	69	10	rotor	rotor	NOUN
ispiv-39	69	11	hubs	hub	NOUN
ispiv-39	69	12	in	in	ADP
ispiv-39	69	13	the	the	DET
ispiv-39	69	14	same	same	ADJ
ispiv-39	69	15	plane	plane	NOUN
ispiv-39	69	16	with	with	ADP
ispiv-39	69	17	laser	laser	NOUN
ispiv-39	69	18	sheet	sheet	NOUN
ispiv-39	69	19	.	.	PUNCT
ispiv-39	70	1	each	each	DET
ispiv-39	70	2	sound	sound	ADJ
ispiv-39	70	3	measurement	measurement	NOUN
ispiv-39	70	4	was	be	AUX
ispiv-39	70	5	recorded	record	VERB
ispiv-39	70	6	for	for	ADP
ispiv-39	70	7	120s	120s	PROPN
ispiv-39	70	8	.	.	PUNCT
ispiv-39	71	1	in	in	ADP
ispiv-39	71	2	addition	addition	NOUN
ispiv-39	71	3	,	,	PUNCT
ispiv-39	71	4	planar	planar	ADJ
ispiv-39	71	5	piv	piv	NOUN
ispiv-39	71	6	measurements	measurement	NOUN
ispiv-39	71	7	were	be	AUX
ispiv-39	71	8	made	make	VERB
ispiv-39	71	9	to	to	PART
ispiv-39	71	10	quantify	quantify	VERB
ispiv-39	71	11	the	the	DET
ispiv-39	71	12	flow	flow	NOUN
ispiv-39	71	13	interactions	interaction	NOUN
ispiv-39	71	14	between	between	ADP
ispiv-39	71	15	the	the	DET
ispiv-39	71	16	adjacent	adjacent	ADJ
ispiv-39	71	17	rotors	rotor	NOUN
ispiv-39	71	18	,	,	PUNCT
ispiv-39	71	19	shown	show	VERB
ispiv-39	71	20	in	in	ADP
ispiv-39	71	21	fig	fig	NOUN
ispiv-39	71	22	.	.	PUNCT
ispiv-39	72	1	2	2	NUM
ispiv-39	72	2	(	(	PUNCT
ispiv-39	72	3	a	a	NOUN
ispiv-39	72	4	)	)	PUNCT
ispiv-39	72	5	.	.	PUNCT
ispiv-39	73	1	the	the	DET
ispiv-39	73	2	air	air	NOUN
ispiv-39	73	3	flow	flow	NOUN
ispiv-39	73	4	was	be	AUX
ispiv-39	73	5	seeded	seed	VERB
ispiv-39	73	6	with	with	ADP
ispiv-39	73	7	~	~	SYM
ispiv-39	73	8	2	2	NUM
ispiv-39	73	9	µm	µm	NOUN
ispiv-39	73	10	water	water	NOUN
ispiv-39	73	11	based	base	VERB
ispiv-39	73	12	droplets	droplet	NOUN
ispiv-39	73	13	generated	generate	VERB
ispiv-39	73	14	by	by	ADP
ispiv-39	73	15	fog	fog	NOUN
ispiv-39	73	16	machine	machine	NOUN
ispiv-39	73	17	(	(	PUNCT
ispiv-39	73	18	i.e.	i.e.	X
ispiv-39	73	19	,	,	PUNCT
ispiv-39	73	20	rosco	rosco	PROPN
ispiv-39	73	21	1900	1900	NUM
ispiv-39	73	22	)	)	PUNCT
ispiv-39	73	23	.	.	PUNCT
ispiv-39	74	1	illumination	illumination	NOUN
ispiv-39	74	2	was	be	AUX
ispiv-39	74	3	provided	provide	VERB
ispiv-39	74	4	by	by	ADP
ispiv-39	74	5	a	a	DET
ispiv-39	74	6	double	double	ADJ
ispiv-39	74	7	-	-	PUNCT
ispiv-39	74	8	pulsed	pulse	VERB
ispiv-39	74	9	nd	nd	NOUN
ispiv-39	74	10	:	:	PUNCT
ispiv-39	74	11	yag	yag	NOUN
ispiv-39	74	12	laser	laser	NOUN
ispiv-39	74	13	(	(	PUNCT
ispiv-39	74	14	newwave	newwave	PROPN
ispiv-39	74	15	gemini	gemini	PROPN
ispiv-39	74	16	200	200	NUM
ispiv-39	74	17	)	)	PUNCT
ispiv-39	74	18	,	,	PUNCT
ispiv-39	74	19	adjusted	adjust	VERB
ispiv-39	74	20	on	on	ADP
ispiv-39	74	21	the	the	DET
ispiv-39	74	22	second	second	ADJ
ispiv-39	74	23	harmonic	harmonic	NOUN
ispiv-39	74	24	and	and	CCONJ
ispiv-39	74	25	emitting	emit	VERB
ispiv-39	74	26	two	two	NUM
ispiv-39	74	27	pulses	pulse	NOUN
ispiv-39	74	28	of	of	ADP
ispiv-39	74	29	200	200	NUM
ispiv-39	74	30	mj	mj	NOUN
ispiv-39	74	31	with	with	ADP
ispiv-39	74	32	the	the	DET
ispiv-39	74	33	wavelength	wavelength	NOUN
ispiv-39	74	34	of	of	ADP
ispiv-39	74	35	532	532	NUM
ispiv-39	74	36	nm	nm	NOUN
ispiv-39	74	37	at	at	ADP
ispiv-39	74	38	a	a	DET
ispiv-39	74	39	repetition	repetition	NOUN
ispiv-39	74	40	rate	rate	NOUN
ispiv-39	74	41	of	of	ADP
ispiv-39	74	42	2	2	NUM
ispiv-39	74	43	hz	hz	NOUN
ispiv-39	74	44	.	.	PUNCT
ispiv-39	75	1	using	use	VERB
ispiv-39	75	2	a	a	DET
ispiv-39	75	3	set	set	NOUN
ispiv-39	75	4	of	of	ADP
ispiv-39	75	5	high	high	ADJ
ispiv-39	75	6	-	-	PUNCT
ispiv-39	75	7	energy	energy	NOUN
ispiv-39	75	8	mirrors	mirror	NOUN
ispiv-39	75	9	and	and	CCONJ
ispiv-39	75	10	optical	optical	ADJ
ispiv-39	75	11	lenses	lense	NOUN
ispiv-39	75	12	,	,	PUNCT
ispiv-39	75	13	the	the	DET
ispiv-39	75	14	laser	laser	NOUN
ispiv-39	75	15	beam	beam	NOUN
ispiv-39	75	16	was	be	AUX
ispiv-39	75	17	shaped	shape	VERB
ispiv-39	75	18	into	into	ADP
ispiv-39	75	19	a	a	DET
ispiv-39	75	20	thin	thin	ADJ
ispiv-39	75	21	light	light	ADJ
ispiv-39	75	22	sheet	sheet	NOUN
ispiv-39	75	23	with	with	ADP
ispiv-39	75	24	a	a	DET
ispiv-39	75	25	thickness	thickness	NOUN
ispiv-39	75	26	of	of	ADP
ispiv-39	75	27	about	about	ADV
ispiv-39	75	28	1.0	1.0	NUM
ispiv-39	75	29	mm	mm	NOUN
ispiv-39	75	30	in	in	ADP
ispiv-39	75	31	the	the	DET
ispiv-39	75	32	measurement	measurement	NOUN
ispiv-39	75	33	interest	interest	NOUN
ispiv-39	75	34	.	.	PUNCT
ispiv-39	76	1	the	the	DET
ispiv-39	76	2	illuminating	illuminate	VERB
ispiv-39	76	3	laser	laser	NOUN
ispiv-39	76	4	sheet	sheet	NOUN
ispiv-39	76	5	was	be	AUX
ispiv-39	76	6	firstly	firstly	ADV
ispiv-39	76	7	aligned	align	VERB
ispiv-39	76	8	horizontally	horizontally	ADV
ispiv-39	76	9	along	along	ADP
ispiv-39	76	10	the	the	DET
ispiv-39	76	11	induced	induced	ADJ
ispiv-39	76	12	flow	flow	NOUN
ispiv-39	76	13	direction	direction	NOUN
ispiv-39	76	14	,	,	PUNCT
ispiv-39	76	15	bisecting	bisect	VERB
ispiv-39	76	16	the	the	DET
ispiv-39	76	17	hub	hub	NOUN
ispiv-39	76	18	in	in	ADP
ispiv-39	76	19	the	the	DET
ispiv-39	76	20	middle	middle	NOUN
ispiv-39	76	21	of	of	ADP
ispiv-39	76	22	the	the	DET
ispiv-39	76	23	rotor	rotor	NOUN
ispiv-39	76	24	,	,	PUNCT
ispiv-39	76	25	to	to	PART
ispiv-39	76	26	perform	perform	VERB
ispiv-39	76	27	planar	planar	ADJ
ispiv-39	76	28	piv	piv	NOUN
ispiv-39	76	29	measurements	measurement	NOUN
ispiv-39	76	30	in	in	ADP
ispiv-39	76	31	the	the	DET
ispiv-39	76	32	x	x	ADJ
ispiv-39	76	33	-	-	PROPN
ispiv-39	76	34	z	z	ADJ
ispiv-39	76	35	plane	plane	NOUN
ispiv-39	76	36	.	.	PUNCT
ispiv-39	77	1	in	in	ADP
ispiv-39	77	2	the	the	DET
ispiv-39	77	3	present	present	ADJ
ispiv-39	77	4	study	study	NOUN
ispiv-39	77	5	,	,	PUNCT
ispiv-39	77	6	the	the	DET
ispiv-39	77	7	planer	planer	NOUN
ispiv-39	77	8	piv	piv	NOUN
ispiv-39	77	9	includes	include	VERB
ispiv-39	77	10	both	both	CCONJ
ispiv-39	77	11	free	free	ADJ
ispiv-39	77	12	-	-	PUNCT
ispiv-39	77	13	run	run	VERB
ispiv-39	77	14	and	and	CCONJ
ispiv-39	77	15	phase	phase	NOUN
ispiv-39	77	16	-	-	PUNCT
ispiv-39	77	17	locked	lock	VERB
ispiv-39	77	18	cases	case	NOUN
ispiv-39	77	19	.	.	PUNCT
ispiv-39	78	1	while	while	SCONJ
ispiv-39	78	2	the	the	DET
ispiv-39	78	3	free	free	ADJ
ispiv-39	78	4	-	-	PUNCT
ispiv-39	78	5	run	run	VERB
ispiv-39	78	6	piv	piv	NOUN
ispiv-39	78	7	were	be	AUX
ispiv-39	78	8	conducted	conduct	VERB
ispiv-39	78	9	to	to	PART
ispiv-39	78	10	determine	determine	VERB
ispiv-39	78	11	the	the	DET
ispiv-39	78	12	ensemble	ensemble	ADJ
ispiv-39	78	13	-	-	PUNCT
ispiv-39	78	14	averaged	average	VERB
ispiv-39	78	15	flow	flow	NOUN
ispiv-39	78	16	statistics	statistic	NOUN
ispiv-39	78	17	behind	behind	ADP
ispiv-39	78	18	the	the	DET
ispiv-39	78	19	rotor	rotor	NOUN
ispiv-39	78	20	,	,	PUNCT
ispiv-39	78	21	the	the	DET
ispiv-39	78	22	phase	phase	NOUN
ispiv-39	78	23	-	-	PUNCT
ispiv-39	78	24	locked	lock	VERB
ispiv-39	78	25	piv	piv	NOUN
ispiv-39	78	26	were	be	AUX
ispiv-39	78	27	used	use	VERB
ispiv-39	78	28	to	to	PART
ispiv-39	78	29	elucidate	elucidate	VERB
ispiv-39	78	30	the	the	DET
ispiv-39	78	31	dependence	dependence	NOUN
ispiv-39	78	32	of	of	ADP
ispiv-39	78	33	unsteady	unsteady	ADJ
ispiv-39	78	34	wake	wake	NOUN
ispiv-39	78	35	vortices	vortex	NOUN
ispiv-39	78	36	with	with	ADP
ispiv-39	78	37	respect	respect	NOUN
ispiv-39	78	38	to	to	ADP
ispiv-39	78	39	the	the	DET
ispiv-39	78	40	position	position	NOUN
ispiv-39	78	41	of	of	ADP
ispiv-39	78	42	rotor	rotor	NOUN
ispiv-39	78	43	blades	blade	NOUN
ispiv-39	78	44	.	.	PUNCT
ispiv-39	79	1	for	for	ADP
ispiv-39	79	2	the	the	DET
ispiv-39	79	3	phase	phase	NOUN
ispiv-39	79	4	-	-	PUNCT
ispiv-39	79	5	locked	lock	VERB
ispiv-39	79	6	piv	piv	NOUN
ispiv-39	79	7	measurements	measurement	NOUN
ispiv-39	79	8	,	,	PUNCT
ispiv-39	79	9	a	a	DET
ispiv-39	79	10	digital	digital	ADJ
ispiv-39	79	11	tachometer	tachometer	NOUN
ispiv-39	79	12	was	be	AUX
ispiv-39	79	13	used	use	VERB
ispiv-39	79	14	to	to	PART
ispiv-39	79	15	detect	detect	VERB
ispiv-39	79	16	the	the	DET
ispiv-39	79	17	position	position	NOUN
ispiv-39	79	18	of	of	ADP
ispiv-39	79	19	a	a	DET
ispiv-39	79	20	premarked	premarked	ADJ
ispiv-39	79	21	blade	blade	NOUN
ispiv-39	79	22	.	.	PUNCT
ispiv-39	80	1	a	a	DET
ispiv-39	80	2	pulse	pulse	NOUN
ispiv-39	80	3	signal	signal	NOUN
ispiv-39	80	4	would	would	AUX
ispiv-39	80	5	be	be	AUX
ispiv-39	80	6	generated	generate	VERB
ispiv-39	80	7	by	by	ADP
ispiv-39	80	8	the	the	DET
ispiv-39	80	9	tachometer	tachometer	NOUN
ispiv-39	80	10	as	as	ADP
ispiv-39	80	11	the	the	DET
ispiv-39	80	12	pre	pre	ADJ
ispiv-39	80	13	-	-	ADJ
ispiv-39	80	14	marked	marked	ADJ
ispiv-39	80	15	blade	blade	NOUN
ispiv-39	80	16	passed	pass	VERB
ispiv-39	80	17	through	through	ADP
ispiv-39	80	18	the	the	DET
ispiv-39	80	19	vertical	vertical	ADJ
ispiv-39	80	20	piv	piv	PROPN
ispiv-39	80	21	plane	plane	NOUN
ispiv-39	80	22	.	.	PUNCT
ispiv-39	81	1	the	the	DET
ispiv-39	81	2	generated	generate	VERB
ispiv-39	81	3	signal	signal	NOUN
ispiv-39	81	4	was	be	AUX
ispiv-39	81	5	then	then	ADV
ispiv-39	81	6	used	use	VERB
ispiv-39	81	7	as	as	ADP
ispiv-39	81	8	the	the	DET
ispiv-39	81	9	input	input	NOUN
ispiv-39	81	10	signal	signal	NOUN
ispiv-39	81	11	to	to	ADP
ispiv-39	81	12	digital	digital	ADJ
ispiv-39	81	13	delay	delay	NOUN
ispiv-39	81	14	generator	generator	PROPN
ispiv-39	81	15	(	(	PUNCT
ispiv-39	81	16	ddg	ddg	PROPN
ispiv-39	81	17	)	)	PUNCT
ispiv-39	81	18	to	to	PART
ispiv-39	81	19	trigger	trigger	VERB
ispiv-39	81	20	the	the	DET
ispiv-39	81	21	piv	piv	NOUN
ispiv-39	81	22	system	system	NOUN
ispiv-39	81	23	.	.	PUNCT
ispiv-39	82	1	through	through	ADP
ispiv-39	82	2	adjusting	adjust	VERB
ispiv-39	82	3	the	the	DET
ispiv-39	82	4	time	time	NOUN
ispiv-39	82	5	delays	delay	NOUN
ispiv-39	82	6	between	between	ADP
ispiv-39	82	7	the	the	DET
ispiv-39	82	8	input	input	NOUN
ispiv-39	82	9	signal	signal	NOUN
ispiv-39	82	10	from	from	ADP
ispiv-39	82	11	tachometer	tachometer	NOUN
ispiv-39	82	12	and	and	CCONJ
ispiv-39	82	13	the	the	DET
ispiv-39	82	14	transistor	transistor	NOUN
ispiv-39	82	15	-	-	PUNCT
ispiv-39	82	16	transistor	transistor	NOUN
ispiv-39	82	17	logic	logic	NOUN
ispiv-39	82	18	signal	signal	NOUN
ispiv-39	82	19	from	from	ADP
ispiv-39	82	20	the	the	DET
ispiv-39	82	21	ddg	ddg	PROPN
ispiv-39	82	22	to	to	PART
ispiv-39	82	23	trigger	trigger	VERB
ispiv-39	82	24	the	the	DET
ispiv-39	82	25	piv	piv	NOUN
ispiv-39	82	26	system	system	NOUN
ispiv-39	82	27	,	,	PUNCT
ispiv-39	82	28	different	different	ADJ
ispiv-39	82	29	phase	phase	NOUN
ispiv-39	82	30	angles	angle	NOUN
ispiv-39	82	31	can	can	AUX
ispiv-39	82	32	be	be	AUX
ispiv-39	82	33	achieved	achieve	VERB
ispiv-39	82	34	.	.	PUNCT
ispiv-39	83	1	for	for	ADP
ispiv-39	83	2	each	each	DET
ispiv-39	83	3	pre	pre	ADJ
ispiv-39	83	4	-	-	ADJ
ispiv-39	83	5	selected	select	VERB
ispiv-39	83	6	phase	phase	NOUN
ispiv-39	83	7	angle	angle	NOUN
ispiv-39	83	8	,	,	PUNCT
ispiv-39	83	9	300	300	NUM
ispiv-39	83	10	frames	frame	NOUN
ispiv-39	83	11	of	of	ADP
ispiv-39	83	12	instantaneous	instantaneous	ADJ
ispiv-39	83	13	piv	piv	NOUN
ispiv-39	83	14	were	be	AUX
ispiv-39	83	15	used	use	VERB
ispiv-39	83	16	to	to	PART
ispiv-39	83	17	calculate	calculate	VERB
ispiv-39	83	18	the	the	DET
ispiv-39	83	19	phase	phase	NOUN
ispiv-39	83	20	-	-	PUNCT
ispiv-39	83	21	averaged	average	VERB
ispiv-39	83	22	flow	flow	NOUN
ispiv-39	83	23	velocity	velocity	NOUN
ispiv-39	83	24	behind	behind	ADP
ispiv-39	83	25	the	the	DET
ispiv-39	83	26	models	model	NOUN
ispiv-39	83	27	.	.	PUNCT
ispiv-39	84	1	finally	finally	ADV
ispiv-39	84	2	,	,	PUNCT
ispiv-39	84	3	a	a	DET
ispiv-39	84	4	stereoscopic	stereoscopic	ADJ
ispiv-39	84	5	piv	piv	NOUN
ispiv-39	84	6	(	(	PUNCT
ispiv-39	84	7	spiv	spiv	NOUN
ispiv-39	84	8	)	)	PUNCT
ispiv-39	84	9	experiment	experiment	NOUN
ispiv-39	84	10	was	be	AUX
ispiv-39	84	11	performed	perform	VERB
ispiv-39	84	12	to	to	PART
ispiv-39	84	13	reveal	reveal	VERB
ispiv-39	84	14	the	the	DET
ispiv-39	84	15	evolution	evolution	NOUN
ispiv-39	84	16	of	of	ADP
ispiv-39	84	17	vortex	vortex	NOUN
ispiv-39	84	18	structures	structure	NOUN
ispiv-39	84	19	at	at	ADP
ispiv-39	84	20	different	different	ADJ
ispiv-39	84	21	downstream	downstream	ADJ
ispiv-39	84	22	locations	location	NOUN
ispiv-39	84	23	behind	behind	ADP
ispiv-39	84	24	the	the	DET
ispiv-39	84	25	rotors	rotor	NOUN
ispiv-39	84	26	(	(	PUNCT
ispiv-39	84	27	i.e.	i.e.	X
ispiv-39	84	28	,	,	PUNCT
ispiv-39	84	29	in	in	ADP
ispiv-39	84	30	x	x	PROPN
ispiv-39	84	31	-	-	ADJ
ispiv-39	84	32	y	y	ADJ
ispiv-39	84	33	planes	plane	NOUN
ispiv-39	84	34	)	)	PUNCT
ispiv-39	84	35	.	.	PUNCT
ispiv-39	85	1	during	during	ADP
ispiv-39	85	2	the	the	DET
ispiv-39	85	3	experiment	experiment	NOUN
ispiv-39	85	4	,	,	PUNCT
ispiv-39	85	5	the	the	DET
ispiv-39	85	6	laser	laser	NOUN
ispiv-39	85	7	sheet	sheet	NOUN
ispiv-39	85	8	was	be	AUX
ispiv-39	85	9	rotated	rotate	VERB
ispiv-39	85	10	90	90	NUM
ispiv-39	85	11	◦	◦	NOUN
ispiv-39	85	12	from	from	ADP
ispiv-39	85	13	its	its	PRON
ispiv-39	85	14	original	original	ADJ
ispiv-39	85	15	position	position	NOUN
ispiv-39	85	16	to	to	ADP
ispiv-39	85	17	the	the	DET
ispiv-39	85	18	vertical	vertical	ADJ
ispiv-39	85	19	direction	direction	NOUN
ispiv-39	85	20	.	.	PUNCT
ispiv-39	86	1	image	image	NOUN
ispiv-39	86	2	acquisitions	acquisition	NOUN
ispiv-39	86	3	were	be	AUX
ispiv-39	86	4	performed	perform	VERB
ispiv-39	86	5	by	by	ADP
ispiv-39	86	6	two	two	NUM
ispiv-39	86	7	14	14	NUM
ispiv-39	86	8	-	-	PUNCT
ispiv-39	86	9	bit	bit	NOUN
ispiv-39	86	10	high	high	ADJ
ispiv-39	86	11	-	-	PUNCT
ispiv-39	86	12	resolution	resolution	NOUN
ispiv-39	86	13	ccd	ccd	NOUN
ispiv-39	86	14	cameras	camera	NOUN
ispiv-39	86	15	(	(	PUNCT
ispiv-39	86	16	pco2000	pco2000	ADJ
ispiv-39	86	17	,	,	PUNCT
ispiv-39	86	18	cooke	cooke	PROPN
ispiv-39	86	19	corp	corp	PROPN
ispiv-39	86	20	.	.	PROPN
ispiv-39	86	21	)	)	PUNCT
ispiv-39	86	22	,	,	PUNCT
ispiv-39	86	23	which	which	PRON
ispiv-39	86	24	were	be	AUX
ispiv-39	86	25	arranged	arrange	VERB
ispiv-39	86	26	with	with	ADP
ispiv-39	86	27	an	an	DET
ispiv-39	86	28	angular	angular	ADJ
ispiv-39	86	29	displacement	displacement	ADJ
ispiv-39	86	30	configuration	configuration	NOUN
ispiv-39	86	31	of	of	ADP
ispiv-39	86	32	about	about	ADV
ispiv-39	86	33	45	45	NUM
ispiv-39	86	34	degrees	degree	NOUN
ispiv-39	86	35	to	to	PART
ispiv-39	86	36	get	get	VERB
ispiv-39	86	37	a	a	DET
ispiv-39	86	38	largely	largely	ADV
ispiv-39	86	39	overlapped	overlapped	ADJ
ispiv-39	86	40	view	view	NOUN
ispiv-39	86	41	.	.	PUNCT
ispiv-39	87	1	with	with	ADP
ispiv-39	87	2	the	the	DET
ispiv-39	87	3	installation	installation	NOUN
ispiv-39	87	4	of	of	ADP
ispiv-39	87	5	tilt	tilt	NOUN
ispiv-39	87	6	-	-	PUNCT
ispiv-39	87	7	axis	axis	NOUN
ispiv-39	87	8	mounts	mount	NOUN
ispiv-39	87	9	and	and	CCONJ
ispiv-39	87	10	the	the	DET
ispiv-39	87	11	laser	laser	NOUN
ispiv-39	87	12	illumination	illumination	NOUN
ispiv-39	87	13	plane	plane	NOUN
ispiv-39	87	14	,	,	PUNCT
ispiv-39	87	15	the	the	DET
ispiv-39	87	16	lenses	lense	NOUN
ispiv-39	87	17	and	and	CCONJ
ispiv-39	87	18	camera	camera	NOUN
ispiv-39	87	19	bodies	body	NOUN
ispiv-39	87	20	were	be	AUX
ispiv-39	87	21	adjusted	adjust	VERB
ispiv-39	87	22	to	to	PART
ispiv-39	87	23	satisfy	satisfy	VERB
ispiv-39	87	24	the	the	DET
ispiv-39	87	25	scheimpflug	scheimpflug	NOUN
ispiv-39	87	26	condition	condition	NOUN
ispiv-39	87	27	.	.	PUNCT
ispiv-39	88	1	the	the	DET
ispiv-39	88	2	ccd	ccd	PROPN
ispiv-39	88	3	cameras	camera	NOUN
ispiv-39	88	4	and	and	CCONJ
ispiv-39	88	5	double	double	ADJ
ispiv-39	88	6	-	-	PUNCT
ispiv-39	88	7	pulsed	pulse	VERB
ispiv-39	88	8	nd	nd	NOUN
ispiv-39	88	9	:	:	PUNCT
ispiv-39	88	10	yag	yag	NOUN
ispiv-39	88	11	laser	laser	NOUN
ispiv-39	88	12	were	be	AUX
ispiv-39	88	13	both	both	PRON
ispiv-39	88	14	connected	connect	VERB
ispiv-39	88	15	to	to	ADP
ispiv-39	88	16	a	a	DET
ispiv-39	88	17	digital	digital	ADJ
ispiv-39	88	18	delay	delay	NOUN
ispiv-39	88	19	generator	generator	PROPN
ispiv-39	88	20	(	(	PUNCT
ispiv-39	88	21	berkeley	berkeley	PROPN
ispiv-39	88	22	nucleonics	nucleonic	NOUN
ispiv-39	88	23	,	,	PUNCT
ispiv-39	88	24	model	model	NOUN
ispiv-39	88	25	565	565	NUM
ispiv-39	88	26	)	)	PUNCT
ispiv-39	88	27	to	to	PART
ispiv-39	88	28	control	control	VERB
ispiv-39	88	29	the	the	DET
ispiv-39	88	30	timing	timing	NOUN
ispiv-39	88	31	of	of	ADP
ispiv-39	88	32	the	the	DET
ispiv-39	88	33	lasers	laser	NOUN
ispiv-39	88	34	and	and	CCONJ
ispiv-39	88	35	image	image	NOUN
ispiv-39	88	36	acquisitions	acquisition	NOUN
ispiv-39	88	37	.	.	PUNCT
ispiv-39	89	1	a	a	DET
ispiv-39	89	2	general	general	ADJ
ispiv-39	89	3	in	in	ADP
ispiv-39	89	4	-	-	PUNCT
ispiv-39	89	5	situ	situ	NOUN
ispiv-39	89	6	calibration	calibration	NOUN
ispiv-39	89	7	procedure	procedure	NOUN
ispiv-39	89	8	was	be	AUX
ispiv-39	89	9	conducted	conduct	VERB
ispiv-39	89	10	to	to	PART
ispiv-39	89	11	obtain	obtain	VERB
ispiv-39	89	12	the	the	DET
ispiv-39	89	13	mapping	mapping	NOUN
ispiv-39	89	14	functions	function	NOUN
ispiv-39	89	15	between	between	ADP
ispiv-39	89	16	the	the	DET
ispiv-39	89	17	images	image	NOUN
ispiv-39	89	18	and	and	CCONJ
ispiv-39	89	19	object	object	VERB
ispiv-39	89	20	planes	plane	NOUN
ispiv-39	89	21	for	for	ADP
ispiv-39	89	22	the	the	DET
ispiv-39	89	23	spiv	spiv	NOUN
ispiv-39	89	24	measurements	measurement	NOUN
ispiv-39	89	25	.	.	PUNCT
ispiv-39	90	1	a	a	DET
ispiv-39	90	2	target	target	NOUN
ispiv-39	90	3	plate	plate	NOUN
ispiv-39	90	4	(	(	PUNCT
ispiv-39	90	5	~350	~350	PROPN
ispiv-39	90	6	×	×	NOUN
ispiv-39	90	7	350	350	NUM
ispiv-39	90	8	mm2	mm2	NOUN
ispiv-39	90	9	)	)	PUNCT
ispiv-39	90	10	with	with	ADP
ispiv-39	90	11	2	2	NUM
ispiv-39	90	12	mm	mm	NOUN
ispiv-39	90	13	diameter	diameter	NOUN
ispiv-39	90	14	dots	dot	NOUN
ispiv-39	90	15	spaced	space	VERB
ispiv-39	90	16	at	at	ADP
ispiv-39	90	17	intervals	interval	NOUN
ispiv-39	90	18	of	of	ADP
ispiv-39	90	19	8	8	NUM
ispiv-39	90	20	mm	mm	NOUN
ispiv-39	90	21	was	be	AUX
ispiv-39	90	22	used	use	VERB
ispiv-39	90	23	for	for	ADP
ispiv-39	90	24	the	the	DET
ispiv-39	90	25	in	in	ADP
ispiv-39	90	26	-	-	PUNCT
ispiv-39	90	27	situ	situ	NOUN
ispiv-39	90	28	calibration	calibration	NOUN
ispiv-39	90	29	.	.	PUNCT
ispiv-39	91	1	the	the	DET
ispiv-39	91	2	mapping	mapping	NOUN
ispiv-39	91	3	https://app.quartzy.com/groups/86483/inventory/4511753?query=fog&sort=-type.name	https://app.quartzy.com/groups/86483/inventory/4511753?query=fog&sort=-type.name	VERB
ispiv-39	91	4	function	function	NOUN
ispiv-39	91	5	used	use	VERB
ispiv-39	91	6	in	in	ADP
ispiv-39	91	7	the	the	DET
ispiv-39	91	8	present	present	ADJ
ispiv-39	91	9	study	study	NOUN
ispiv-39	91	10	was	be	AUX
ispiv-39	91	11	a	a	DET
ispiv-39	91	12	multi	multi	ADJ
ispiv-39	91	13	-	-	ADJ
ispiv-39	91	14	dimensional	dimensional	ADJ
ispiv-39	91	15	polynomial	polynomial	ADJ
ispiv-39	91	16	function	function	NOUN
ispiv-39	91	17	,	,	PUNCT
ispiv-39	91	18	which	which	PRON
ispiv-39	91	19	is	be	AUX
ispiv-39	91	20	third	third	ADJ
ispiv-39	91	21	order	order	NOUN
ispiv-39	91	22	for	for	ADP
ispiv-39	91	23	the	the	DET
ispiv-39	91	24	directions	direction	NOUN
ispiv-39	91	25	parallel	parallel	ADJ
ispiv-39	91	26	to	to	ADP
ispiv-39	91	27	the	the	DET
ispiv-39	91	28	laser	laser	NOUN
ispiv-39	91	29	illumination	illumination	NOUN
ispiv-39	91	30	plane	plane	NOUN
ispiv-39	91	31	(	(	PUNCT
ispiv-39	91	32	i.e.	i.e.	X
ispiv-39	91	33	,	,	PUNCT
ispiv-39	91	34	x	x	PUNCT
ispiv-39	91	35	and	and	CCONJ
ispiv-39	91	36	y	y	PROPN
ispiv-39	91	37	directions	direction	NOUN
ispiv-39	91	38	)	)	PUNCT
ispiv-39	91	39	,	,	PUNCT
ispiv-39	91	40	and	and	CCONJ
ispiv-39	91	41	second	second	ADJ
ispiv-39	91	42	order	order	NOUN
ispiv-39	91	43	for	for	ADP
ispiv-39	91	44	the	the	DET
ispiv-39	91	45	direction	direction	NOUN
ispiv-39	91	46	normal	normal	ADJ
ispiv-39	91	47	to	to	ADP
ispiv-39	91	48	the	the	DET
ispiv-39	91	49	laser	laser	NOUN
ispiv-39	91	50	sheet	sheet	NOUN
ispiv-39	91	51	plane	plane	NOUN
ispiv-39	91	52	(	(	PUNCT
ispiv-39	91	53	i.e.	i.e.	X
ispiv-39	91	54	,	,	PUNCT
ispiv-39	91	55	z	z	NOUN
ispiv-39	91	56	direction	direction	NOUN
ispiv-39	91	57	)	)	PUNCT
ispiv-39	91	58	.	.	PUNCT
ispiv-39	92	1	(	(	PUNCT
ispiv-39	92	2	a	a	X
ispiv-39	92	3	)	)	PUNCT
ispiv-39	92	4	setup	setup	NOUN
ispiv-39	92	5	for	for	ADP
ispiv-39	92	6	dynamic	dynamic	ADJ
ispiv-39	92	7	loads	load	NOUN
ispiv-39	92	8	and	and	CCONJ
ispiv-39	92	9	piv	piv	NOUN
ispiv-39	92	10	measurement	measurement	NOUN
ispiv-39	92	11	(	(	PUNCT
ispiv-39	92	12	b	b	NOUN
ispiv-39	92	13	)	)	PUNCT
ispiv-39	92	14	setup	setup	NOUN
ispiv-39	92	15	for	for	ADP
ispiv-39	92	16	aeroacoustic	aeroacoustic	ADJ
ispiv-39	92	17	measurement	measurement	NOUN
ispiv-39	92	18	figure	figure	NOUN
ispiv-39	92	19	2	2	NUM
ispiv-39	92	20	.	.	PUNCT
ispiv-39	92	21	experimental	experimental	ADJ
ispiv-39	92	22	setups	setup	NOUN
ispiv-39	92	23	used	use	VERB
ispiv-39	92	24	in	in	ADP
ispiv-39	92	25	the	the	DET
ispiv-39	92	26	present	present	ADJ
ispiv-39	92	27	study	study	NOUN
ispiv-39	92	28	.	.	PUNCT
ispiv-39	93	1	in	in	ADP
ispiv-39	93	2	the	the	DET
ispiv-39	93	3	present	present	ADJ
ispiv-39	93	4	study	study	NOUN
ispiv-39	93	5	,	,	PUNCT
ispiv-39	93	6	the	the	DET
ispiv-39	93	7	instantaneous	instantaneous	ADJ
ispiv-39	93	8	flow	flow	NOUN
ispiv-39	93	9	velocity	velocity	NOUN
ispiv-39	93	10	vectors	vector	NOUN
ispiv-39	93	11	were	be	AUX
ispiv-39	93	12	obtained	obtain	VERB
ispiv-39	93	13	by	by	ADP
ispiv-39	93	14	using	use	VERB
ispiv-39	93	15	a	a	DET
ispiv-39	93	16	frameto	frameto	VERB
ispiv-39	93	17	-	-	PUNCT
ispiv-39	93	18	frame	frame	NOUN
ispiv-39	93	19	cross	cross	ADJ
ispiv-39	93	20	-	-	ADJ
ispiv-39	93	21	correlation	correlation	ADJ
ispiv-39	93	22	technique	technique	NOUN
ispiv-39	93	23	to	to	PART
ispiv-39	93	24	process	process	VERB
ispiv-39	93	25	the	the	DET
ispiv-39	93	26	acquired	acquire	VERB
ispiv-39	93	27	piv	piv	NOUN
ispiv-39	93	28	images	image	NOUN
ispiv-39	93	29	with	with	ADP
ispiv-39	93	30	an	an	DET
ispiv-39	93	31	interrogation	interrogation	NOUN
ispiv-39	93	32	window	window	NOUN
ispiv-39	93	33	size	size	NOUN
ispiv-39	93	34	of	of	ADP
ispiv-39	93	35	32	32	NUM
ispiv-39	93	36	pixels	pixel	NOUN
ispiv-39	93	37	×	×	NOUN
ispiv-39	93	38	32	32	NUM
ispiv-39	93	39	pixels	pixel	NOUN
ispiv-39	93	40	.	.	PUNCT
ispiv-39	94	1	an	an	DET
ispiv-39	94	2	effective	effective	ADJ
ispiv-39	94	3	overlap	overlap	NOUN
ispiv-39	94	4	of	of	ADP
ispiv-39	94	5	50	50	NUM
ispiv-39	94	6	%	%	NOUN
ispiv-39	94	7	of	of	ADP
ispiv-39	94	8	the	the	DET
ispiv-39	94	9	interrogation	interrogation	NOUN
ispiv-39	94	10	windows	window	NOUN
ispiv-39	94	11	was	be	AUX
ispiv-39	94	12	employed	employ	VERB
ispiv-39	94	13	in	in	ADP
ispiv-39	94	14	planar	planar	ADJ
ispiv-39	94	15	piv	piv	NOUN
ispiv-39	94	16	image	image	NOUN
ispiv-39	94	17	processing	processing	NOUN
ispiv-39	94	18	,	,	PUNCT
ispiv-39	94	19	which	which	PRON
ispiv-39	94	20	resulted	result	VERB
ispiv-39	94	21	in	in	ADP
ispiv-39	94	22	a	a	DET
ispiv-39	94	23	spatial	spatial	ADJ
ispiv-39	94	24	resolution	resolution	NOUN
ispiv-39	94	25	of	of	ADP
ispiv-39	94	26	2.4	2.4	NUM
ispiv-39	94	27	mm	mm	NOUN
ispiv-39	94	28	(	(	PUNCT
ispiv-39	94	29	i.e.	i.e.	X
ispiv-39	94	30	,	,	PUNCT
ispiv-39	94	31	0.01d	0.01d	NUM
ispiv-39	94	32	)	)	PUNCT
ispiv-39	94	33	for	for	ADP
ispiv-39	94	34	the	the	DET
ispiv-39	94	35	measurement	measurement	NOUN
ispiv-39	94	36	results	result	VERB
ispiv-39	94	37	.	.	PUNCT
ispiv-39	95	1	similar	similar	ADJ
ispiv-39	95	2	processing	processing	NOUN
ispiv-39	95	3	methodology	methodology	NOUN
ispiv-39	95	4	was	be	AUX
ispiv-39	95	5	also	also	ADV
ispiv-39	95	6	used	use	VERB
ispiv-39	95	7	for	for	ADP
ispiv-39	95	8	the	the	DET
ispiv-39	95	9	spiv	spiv	NOUN
ispiv-39	95	10	image	image	NOUN
ispiv-39	95	11	processing	processing	NOUN
ispiv-39	95	12	.	.	PUNCT
ispiv-39	96	1	the	the	DET
ispiv-39	96	2	instantaneous	instantaneous	ADJ
ispiv-39	96	3	2d	2d	PROPN
ispiv-39	96	4	velocity	velocity	NOUN
ispiv-39	96	5	vectors	vector	NOUN
ispiv-39	96	6	were	be	AUX
ispiv-39	96	7	then	then	ADV
ispiv-39	96	8	used	use	VERB
ispiv-39	96	9	to	to	PART
ispiv-39	96	10	reconstruct	reconstruct	VERB
ispiv-39	96	11	all	all	DET
ispiv-39	96	12	three	three	NUM
ispiv-39	96	13	components	component	NOUN
ispiv-39	96	14	of	of	ADP
ispiv-39	96	15	the	the	DET
ispiv-39	96	16	flow	flow	NOUN
ispiv-39	96	17	velocity	velocity	NOUN
ispiv-39	96	18	vectors	vector	NOUN
ispiv-39	96	19	in	in	ADP
ispiv-39	96	20	the	the	DET
ispiv-39	96	21	laser	laser	NOUN
ispiv-39	96	22	illuminating	illuminate	VERB
ispiv-39	96	23	plane	plane	NOUN
ispiv-39	96	24	by	by	ADP
ispiv-39	96	25	using	use	VERB
ispiv-39	96	26	the	the	DET
ispiv-39	96	27	mapping	mapping	NOUN
ispiv-39	96	28	functions	function	NOUN
ispiv-39	96	29	obtained	obtain	VERB
ispiv-39	96	30	through	through	ADP
ispiv-39	96	31	the	the	DET
ispiv-39	96	32	calibration	calibration	NOUN
ispiv-39	96	33	procedure	procedure	NOUN
ispiv-39	96	34	.	.	PUNCT
ispiv-39	97	1	after	after	SCONJ
ispiv-39	97	2	the	the	DET
ispiv-39	97	3	instantaneous	instantaneous	ADJ
ispiv-39	97	4	flow	flow	NOUN
ispiv-39	97	5	velocity	velocity	NOUN
ispiv-39	97	6	vectors	vector	NOUN
ispiv-39	97	7	(	(	PUNCT
ispiv-39	97	8	iu	iu	ADV
ispiv-39	97	9	,	,	PUNCT
ispiv-39	97	10	iv	iv	INTJ
ispiv-39	97	11	,	,	PUNCT
ispiv-39	97	12	iw	iw	PROPN
ispiv-39	97	13	)	)	PUNCT
ispiv-39	97	14	were	be	AUX
ispiv-39	97	15	determined	determine	VERB
ispiv-39	97	16	,	,	PUNCT
ispiv-39	97	17	the	the	DET
ispiv-39	97	18	distributions	distribution	NOUN
ispiv-39	97	19	of	of	ADP
ispiv-39	97	20	the	the	DET
ispiv-39	97	21	ensemble	ensemble	ADJ
ispiv-39	97	22	-	-	PUNCT
ispiv-39	97	23	averaged	average	VERB
ispiv-39	97	24	flow	flow	NOUN
ispiv-39	97	25	quantities	quantity	NOUN
ispiv-39	97	26	such	such	ADJ
ispiv-39	97	27	as	as	ADP
ispiv-39	97	28	mean	mean	ADJ
ispiv-39	97	29	velocity	velocity	NOUN
ispiv-39	97	30	(	(	PUNCT
ispiv-39	97	31	u	u	NOUN
ispiv-39	97	32	,	,	PUNCT
ispiv-39	97	33	v	v	NOUN
ispiv-39	97	34	,	,	PUNCT
ispiv-39	97	35	w	w	NOUN
ispiv-39	97	36	)	)	PUNCT
ispiv-39	97	37	,	,	PUNCT
ispiv-39	97	38	normalized	normalize	VERB
ispiv-39	97	39	turbulence	turbulence	NOUN
ispiv-39	97	40	kinetic	kinetic	ADJ
ispiv-39	97	41	energy	energy	NOUN
ispiv-39	97	42	(	(	PUNCT
ispiv-39	97	43	(	(	PUNCT
ispiv-39	97	44	)	)	PUNCT
ispiv-39	97	45	'	'	NUM
ispiv-39	97	46	2	2	NUM
ispiv-39	97	47	'	'	NUM
ispiv-39	97	48	2	2	NUM
ispiv-39	97	49	'	'	NUM
ispiv-39	97	50	2	2	NUM
ispiv-39	97	51	20.5	20.5	NUM
ispiv-39	97	52	u	u	NOUN
ispiv-39	97	53	v	v	NOUN
ispiv-39	97	54	w	w	NOUN
ispiv-39	97	55	u+	u+	ADJ
ispiv-39	97	56	+	+	NUM
ispiv-39	97	57	)	)	PUNCT
ispiv-39	97	58	,	,	PUNCT
ispiv-39	97	59	spanwise	spanwise	VERB
ispiv-39	97	60	vorticity	vorticity	NOUN
ispiv-39	97	61	(	(	PUNCT
ispiv-39	97	62	i	i	PRON
ispiv-39	97	63	i	i	VERB
ispiv-39	97	64	y	y	VERB
ispiv-39	97	65	u	u	X
ispiv-39	97	66	w	w	PROPN
ispiv-39	97	67	z	z	PROPN
ispiv-39	97	68	x	x	PROPN
ispiv-39	97	69			PRON
ispiv-39	97	70			ADJ
ispiv-39	97	71			PROPN
ispiv-39	97	72	=	=	SYM
ispiv-39	98	1	−	−	PROPN
ispiv-39	98	2			ADJ
ispiv-39	98	3			PROPN
ispiv-39	98	4	)	)	PUNCT
ispiv-39	98	5	for	for	ADP
ispiv-39	98	6	the	the	DET
ispiv-39	98	7	planar	planar	ADJ
ispiv-39	98	8	piv	piv	NOUN
ispiv-39	98	9	measurements	measurement	NOUN
ispiv-39	98	10	,	,	PUNCT
ispiv-39	98	11	and	and	CCONJ
ispiv-39	98	12	streamwise	streamwise	VERB
ispiv-39	98	13	vorticity	vorticity	NOUN
ispiv-39	98	14	(	(	PUNCT
ispiv-39	98	15	i	i	PRON
ispiv-39	98	16	i	i	PRON
ispiv-39	98	17	z	z	VERB
ispiv-39	98	18	v	v	NUM
ispiv-39	98	19	u	u	NOUN
ispiv-39	98	20	x	x	PROPN
ispiv-39	98	21	y	y	PROPN
ispiv-39	98	22			PROPN
ispiv-39	98	23			ADJ
ispiv-39	98	24			PROPN
ispiv-39	98	25	=	=	SYM
ispiv-39	99	1	−	−	PROPN
ispiv-39	99	2			ADJ
ispiv-39	99	3			PROPN
ispiv-39	99	4	)	)	PUNCT
ispiv-39	99	5	for	for	ADP
ispiv-39	99	6	the	the	DET
ispiv-39	99	7	spiv	spiv	NOUN
ispiv-39	99	8	measurements	measurement	NOUN
ispiv-39	99	9	were	be	AUX
ispiv-39	99	10	obtained	obtain	VERB
ispiv-39	99	11	from	from	ADP
ispiv-39	99	12	a	a	DET
ispiv-39	99	13	sequence	sequence	NOUN
ispiv-39	99	14	of	of	ADP
ispiv-39	99	15	1,000	1,000	NUM
ispiv-39	99	16	instantaneous	instantaneous	ADJ
ispiv-39	99	17	piv	piv	NOUN
ispiv-39	99	18	results	result	NOUN
ispiv-39	99	19	(	(	PUNCT
ispiv-39	99	20	i.e.	i.e.	X
ispiv-39	99	21	,	,	PUNCT
ispiv-39	99	22	300	300	NUM
ispiv-39	99	23	for	for	ADP
ispiv-39	99	24	phase	phase	NOUN
ispiv-39	99	25	-	-	PUNCT
ispiv-39	99	26	locked	lock	VERB
ispiv-39	99	27	piv	piv	NOUN
ispiv-39	99	28	)	)	PUNCT
ispiv-39	99	29	.	.	PUNCT
ispiv-39	100	1	the	the	DET
ispiv-39	100	2	uncertainty	uncertainty	NOUN
ispiv-39	100	3	level	level	NOUN
ispiv-39	100	4	for	for	ADP
ispiv-39	100	5	the	the	DET
ispiv-39	100	6	piv	piv	NOUN
ispiv-39	100	7	measurements	measurement	NOUN
ispiv-39	100	8	is	be	AUX
ispiv-39	100	9	estimated	estimate	VERB
ispiv-39	100	10	to	to	PART
ispiv-39	100	11	be	be	AUX
ispiv-39	100	12	within	within	ADP
ispiv-39	100	13	3	3	NUM
ispiv-39	100	14	%	%	NOUN
ispiv-39	100	15	for	for	ADP
ispiv-39	100	16	the	the	DET
ispiv-39	100	17	instantaneous	instantaneous	ADJ
ispiv-39	100	18	velocity	velocity	NOUN
ispiv-39	100	19	vectors	vector	NOUN
ispiv-39	100	20	,	,	PUNCT
ispiv-39	100	21	and	and	CCONJ
ispiv-39	100	22	within	within	ADP
ispiv-39	100	23	5	5	NUM
ispiv-39	100	24	%	%	NOUN
ispiv-39	100	25	for	for	ADP
ispiv-39	100	26	the	the	DET
ispiv-39	100	27	measured	measure	VERB
ispiv-39	100	28	ensembleaveraged	ensembleaverage	VERB
ispiv-39	100	29	quantities	quantity	NOUN
ispiv-39	100	30	such	such	ADJ
ispiv-39	100	31	as	as	ADP
ispiv-39	100	32	vorticity	vorticity	NOUN
ispiv-39	100	33	distributions	distribution	NOUN
ispiv-39	100	34	.	.	PUNCT
ispiv-39	101	1	iii	iii	X
ispiv-39	101	2	.	.	PUNCT
ispiv-39	101	3	measurements	measurement	NOUN
ispiv-39	101	4	results	result	NOUN
ispiv-39	101	5	and	and	CCONJ
ispiv-39	101	6	discussion	discussion	NOUN
ispiv-39	101	7	a.	a.	NOUN
ispiv-39	101	8	dynamic	dynamic	PROPN
ispiv-39	101	9	load	load	NOUN
ispiv-39	101	10	measurement	measurement	NOUN
ispiv-39	101	11	results	result	NOUN
ispiv-39	101	12	figure	figure	VERB
ispiv-39	101	13	3	3	NUM
ispiv-39	101	14	presents	present	NOUN
ispiv-39	101	15	the	the	DET
ispiv-39	101	16	normalized	normalized	ADJ
ispiv-39	101	17	thrust	thrust	NOUN
ispiv-39	101	18	coefficient	coefficient	NOUN
ispiv-39	101	19	and	and	CCONJ
ispiv-39	101	20	standard	standard	ADJ
ispiv-39	101	21	deviation	deviation	NOUN
ispiv-39	101	22	profiles	profile	NOUN
ispiv-39	101	23	for	for	ADP
ispiv-39	101	24	the	the	DET
ispiv-39	101	25	twinrotor	twinrotor	NOUN
ispiv-39	101	26	and	and	CCONJ
ispiv-39	101	27	baseline	baseline	ADJ
ispiv-39	101	28	cases	case	NOUN
ispiv-39	101	29	at	at	ADP
ispiv-39	101	30	various	various	ADJ
ispiv-39	101	31	separation	separation	NOUN
ispiv-39	101	32	distances	distance	NOUN
ispiv-39	101	33	,	,	PUNCT
ispiv-39	101	34	where	where	SCONJ
ispiv-39	101	35	the	the	DET
ispiv-39	101	36	thrust	thrust	NOUN
ispiv-39	101	37	coefficient	coefficient	NOUN
ispiv-39	101	38	(	(	PUNCT
ispiv-39	101	39	i.e.	i.e.	X
ispiv-39	101	40	,	,	PUNCT
ispiv-39	101	41	2	2	NUM
ispiv-39	101	42	4	4	NUM
ispiv-39	101	43	3	3	NUM
ispiv-39	101	44	4	4	NUM
ispiv-39	101	45	t	t	NOUN
ispiv-39	101	46	t	t	NOUN
ispiv-39	101	47	c	c	NOUN
ispiv-39	101	48	n	n	PRON
ispiv-39	101	49	d	d	NOUN
ispiv-39	101	50			PROPN
ispiv-39	101	51	=	=	PUNCT
ispiv-39	101	52	)	)	PUNCT
ispiv-39	101	53	and	and	CCONJ
ispiv-39	101	54	standard	standard	ADJ
ispiv-39	101	55	deviation	deviation	NOUN
ispiv-39	101	56	are	be	AUX
ispiv-39	101	57	normalized	normalize	VERB
ispiv-39	101	58	by	by	ADP
ispiv-39	101	59	the	the	DET
ispiv-39	101	60	corresponding	corresponding	ADJ
ispiv-39	101	61	quantities	quantity	NOUN
ispiv-39	101	62	of	of	ADP
ispiv-39	101	63	the	the	DET
ispiv-39	101	64	single	single	ADJ
ispiv-39	101	65	rotor	rotor	NOUN
ispiv-39	101	66	,	,	PUNCT
ispiv-39	101	67	which	which	PRON
ispiv-39	101	68	are	be	AUX
ispiv-39	101	69	0.013	0.013	NUM
ispiv-39	101	70	and	and	CCONJ
ispiv-39	101	71	0.21	0.21	NUM
ispiv-39	101	72	newtons	newton	NOUN
ispiv-39	101	73	,	,	PUNCT
ispiv-39	101	74	respectively	respectively	ADV
ispiv-39	101	75	.	.	PUNCT
ispiv-39	102	1	during	during	ADP
ispiv-39	102	2	the	the	DET
ispiv-39	102	3	experiment	experiment	NOUN
ispiv-39	102	4	,	,	PUNCT
ispiv-39	102	5	the	the	DET
ispiv-39	102	6	rotational	rotational	ADJ
ispiv-39	102	7	speed	speed	NOUN
ispiv-39	102	8	of	of	ADP
ispiv-39	102	9	each	each	DET
ispiv-39	102	10	rotor	rotor	NOUN
ispiv-39	102	11	(	(	PUNCT
ispiv-39	102	12	i.e.	i.e.	X
ispiv-39	102	13	,	,	PUNCT
ispiv-39	102	14	n	n	CCONJ
ispiv-39	102	15	)	)	PUNCT
ispiv-39	102	16	was	be	AUX
ispiv-39	102	17	kept	keep	VERB
ispiv-39	102	18	constant	constant	ADJ
ispiv-39	102	19	at	at	ADP
ispiv-39	102	20	81hz	81hz	NOUN
ispiv-39	102	21	,	,	PUNCT
ispiv-39	102	22	but	but	CCONJ
ispiv-39	102	23	the	the	DET
ispiv-39	102	24	separation	separation	NOUN
ispiv-39	102	25	distance	distance	NOUN
ispiv-39	102	26	between	between	ADP
ispiv-39	102	27	rotor	rotor	NOUN
ispiv-39	102	28	tips	tip	NOUN
ispiv-39	102	29	was	be	AUX
ispiv-39	102	30	adjusted	adjust	VERB
ispiv-39	102	31	from	from	ADP
ispiv-39	102	32	l	l	PROPN
ispiv-39	102	33	/	/	SYM
ispiv-39	102	34	d	d	NOUN
ispiv-39	102	35	=	=	NOUN
ispiv-39	102	36	0.05	0.05	NUM
ispiv-39	102	37	to	to	ADP
ispiv-39	102	38	1.0	1.0	NUM
ispiv-39	102	39	.	.	PUNCT
ispiv-39	103	1	as	as	SCONJ
ispiv-39	103	2	shown	show	VERB
ispiv-39	103	3	clearly	clearly	ADV
ispiv-39	103	4	in	in	ADP
ispiv-39	103	5	fig	fig	NOUN
ispiv-39	103	6	.	.	PUNCT
ispiv-39	104	1	3	3	NUM
ispiv-39	104	2	,	,	PUNCT
ispiv-39	104	3	though	though	SCONJ
ispiv-39	104	4	the	the	DET
ispiv-39	104	5	separation	separation	NOUN
ispiv-39	104	6	distance	distance	NOUN
ispiv-39	104	7	was	be	AUX
ispiv-39	104	8	shortened	shorten	VERB
ispiv-39	104	9	by	by	ADP
ispiv-39	104	10	a	a	DET
ispiv-39	104	11	factor	factor	NOUN
ispiv-39	104	12	of	of	ADP
ispiv-39	104	13	20	20	NUM
ispiv-39	104	14	,	,	PUNCT
ispiv-39	104	15	the	the	DET
ispiv-39	104	16	measured	measured	ADJ
ispiv-39	104	17	thrust	thrust	NOUN
ispiv-39	104	18	coefficient	coefficient	NOUN
ispiv-39	104	19	for	for	ADP
ispiv-39	104	20	the	the	DET
ispiv-39	104	21	rotor	rotor	NOUN
ispiv-39	104	22	in	in	ADP
ispiv-39	104	23	twin	twin	ADJ
ispiv-39	104	24	-	-	PUNCT
ispiv-39	104	25	rotor	rotor	NOUN
ispiv-39	104	26	case	case	NOUN
ispiv-39	104	27	was	be	AUX
ispiv-39	104	28	found	find	VERB
ispiv-39	104	29	to	to	PART
ispiv-39	104	30	drop	drop	VERB
ispiv-39	104	31	less	less	ADJ
ispiv-39	104	32	than	than	ADP
ispiv-39	104	33	2	2	NUM
ispiv-39	104	34	%	%	NOUN
ispiv-39	104	35	.	.	PUNCT
ispiv-39	105	1	this	this	PRON
ispiv-39	105	2	suggests	suggest	VERB
ispiv-39	105	3	that	that	SCONJ
ispiv-39	105	4	the	the	DET
ispiv-39	105	5	generated	generate	VERB
ispiv-39	105	6	mean	mean	NOUN
ispiv-39	105	7	thrust	thrust	NOUN
ispiv-39	105	8	is	be	AUX
ispiv-39	105	9	independent	independent	ADJ
ispiv-39	105	10	of	of	ADP
ispiv-39	105	11	the	the	DET
ispiv-39	105	12	separation	separation	NOUN
ispiv-39	105	13	distance	distance	NOUN
ispiv-39	105	14	.	.	PUNCT
ispiv-39	106	1	similar	similar	ADJ
ispiv-39	106	2	results	result	NOUN
ispiv-39	106	3	were	be	AUX
ispiv-39	106	4	also	also	ADV
ispiv-39	106	5	reported	report	VERB
ispiv-39	106	6	by	by	ADP
ispiv-39	106	7	yoon	yoon	PROPN
ispiv-39	106	8	et	et	PROPN
ispiv-39	106	9	al.(yoon	al.(yoon	PROPN
ispiv-39	106	10	et	et	PROPN
ispiv-39	106	11	al	al	PROPN
ispiv-39	106	12	.	.	PROPN
ispiv-39	106	13	2016	2016	NUM
ispiv-39	106	14	)	)	PUNCT
ispiv-39	106	15	,	,	PUNCT
ispiv-39	106	16	who	who	PRON
ispiv-39	106	17	computationally	computationally	ADV
ispiv-39	106	18	studied	study	VERB
ispiv-39	106	19	the	the	DET
ispiv-39	106	20	aerodynamic	aerodynamic	ADJ
ispiv-39	106	21	interactions	interaction	NOUN
ispiv-39	106	22	of	of	ADP
ispiv-39	106	23	multi	multi	ADJ
ispiv-39	106	24	-	-	ADJ
ispiv-39	106	25	rotor	rotor	ADJ
ispiv-39	106	26	flows	flow	NOUN
ispiv-39	106	27	.	.	PUNCT
ispiv-39	107	1	it	it	PRON
ispiv-39	107	2	is	be	AUX
ispiv-39	107	3	worth	worth	ADJ
ispiv-39	107	4	mentioning	mention	VERB
ispiv-39	107	5	that	that	SCONJ
ispiv-39	107	6	the	the	DET
ispiv-39	107	7	separation	separation	NOUN
ispiv-39	107	8	distance	distance	NOUN
ispiv-39	107	9	also	also	ADV
ispiv-39	107	10	has	have	VERB
ispiv-39	107	11	a	a	DET
ispiv-39	107	12	negligible	negligible	ADJ
ispiv-39	107	13	effect	effect	NOUN
ispiv-39	107	14	on	on	ADP
ispiv-39	107	15	the	the	DET
ispiv-39	107	16	power	power	NOUN
ispiv-39	107	17	consumption	consumption	NOUN
ispiv-39	107	18	of	of	ADP
ispiv-39	107	19	rotors	rotor	NOUN
ispiv-39	107	20	.	.	PUNCT
ispiv-39	108	1	for	for	ADP
ispiv-39	108	2	a	a	DET
ispiv-39	108	3	fixed	fix	VERB
ispiv-39	108	4	rotating	rotate	VERB
ispiv-39	108	5	frequency	frequency	NOUN
ispiv-39	108	6	,	,	PUNCT
ispiv-39	108	7	consumed	consume	VERB
ispiv-39	108	8	power	power	NOUN
ispiv-39	108	9	for	for	ADP
ispiv-39	108	10	the	the	DET
ispiv-39	108	11	twin	twin	ADJ
ispiv-39	108	12	-	-	PUNCT
ispiv-39	108	13	rotor	rotor	NOUN
ispiv-39	108	14	case	case	NOUN
ispiv-39	108	15	was	be	AUX
ispiv-39	108	16	approximately	approximately	ADV
ispiv-39	108	17	same	same	ADJ
ispiv-39	108	18	(	(	PUNCT
ispiv-39	108	19	i.e.	i.e.	X
ispiv-39	108	20	,	,	PUNCT
ispiv-39	108	21	difference	difference	NOUN
ispiv-39	108	22	within	within	ADP
ispiv-39	108	23	1	1	NUM
ispiv-39	108	24	%	%	NOUN
ispiv-39	108	25	)	)	PUNCT
ispiv-39	108	26	for	for	ADP
ispiv-39	108	27	all	all	DET
ispiv-39	108	28	test	test	NOUN
ispiv-39	108	29	cases	case	NOUN
ispiv-39	108	30	.	.	PUNCT
ispiv-39	109	1	while	while	SCONJ
ispiv-39	109	2	the	the	DET
ispiv-39	109	3	separation	separation	NOUN
ispiv-39	109	4	distance	distance	NOUN
ispiv-39	109	5	had	have	VERB
ispiv-39	109	6	a	a	DET
ispiv-39	109	7	limited	limited	ADJ
ispiv-39	109	8	effect	effect	NOUN
ispiv-39	109	9	on	on	ADP
ispiv-39	109	10	the	the	DET
ispiv-39	109	11	thrust	thrust	ADJ
ispiv-39	109	12	coefficient	coefficient	NOUN
ispiv-39	109	13	of	of	ADP
ispiv-39	109	14	the	the	DET
ispiv-39	109	15	rotor	rotor	NOUN
ispiv-39	109	16	,	,	PUNCT
ispiv-39	109	17	the	the	DET
ispiv-39	109	18	force	force	NOUN
ispiv-39	109	19	fluctuations	fluctuation	NOUN
ispiv-39	109	20	(	(	PUNCT
ispiv-39	109	21	i.e.	i.e.	X
ispiv-39	109	22	,	,	PUNCT
ispiv-39	109	23	thrust	thrust	VERB
ispiv-39	109	24	standard	standard	ADJ
ispiv-39	109	25	deviation	deviation	NOUN
ispiv-39	109	26	)	)	PUNCT
ispiv-39	109	27	for	for	ADP
ispiv-39	109	28	the	the	DET
ispiv-39	109	29	monitored	monitor	VERB
ispiv-39	109	30	rotor	rotor	NOUN
ispiv-39	109	31	in	in	ADP
ispiv-39	109	32	twin	twin	ADJ
ispiv-39	109	33	-	-	PUNCT
ispiv-39	109	34	rotor	rotor	NOUN
ispiv-39	109	35	system	system	NOUN
ispiv-39	109	36	were	be	AUX
ispiv-39	109	37	found	find	VERB
ispiv-39	109	38	to	to	PART
ispiv-39	109	39	increase	increase	VERB
ispiv-39	109	40	dramatically	dramatically	ADV
ispiv-39	109	41	as	as	SCONJ
ispiv-39	109	42	the	the	DET
ispiv-39	109	43	separation	separation	NOUN
ispiv-39	109	44	distance	distance	NOUN
ispiv-39	109	45	reduces	reduce	VERB
ispiv-39	109	46	.	.	PUNCT
ispiv-39	110	1	more	more	ADV
ispiv-39	110	2	specifically	specifically	ADV
ispiv-39	110	3	,	,	PUNCT
ispiv-39	110	4	the	the	DET
ispiv-39	110	5	measured	measured	ADJ
ispiv-39	110	6	thrust	thrust	NOUN
ispiv-39	110	7	fluctuations	fluctuation	NOUN
ispiv-39	110	8	for	for	ADP
ispiv-39	110	9	the	the	DET
ispiv-39	110	10	l	l	NOUN
ispiv-39	110	11	=	=	SYM
ispiv-39	110	12	0.05d	0.05d	PROPN
ispiv-39	110	13	case	case	NOUN
ispiv-39	110	14	was	be	AUX
ispiv-39	110	15	found	find	VERB
ispiv-39	110	16	to	to	PART
ispiv-39	110	17	be	be	AUX
ispiv-39	110	18	~2.4	~2.4	NUM
ispiv-39	110	19	times	time	NOUN
ispiv-39	110	20	larger	large	ADJ
ispiv-39	110	21	than	than	ADP
ispiv-39	110	22	that	that	PRON
ispiv-39	110	23	of	of	ADP
ispiv-39	110	24	the	the	DET
ispiv-39	110	25	l=	l=	ADJ
ispiv-39	110	26	1.0d	1.0d	PROPN
ispiv-39	110	27	case	case	NOUN
ispiv-39	110	28	.	.	PUNCT
ispiv-39	111	1	as	as	SCONJ
ispiv-39	111	2	mentioned	mention	VERB
ispiv-39	111	3	above	above	ADV
ispiv-39	111	4	,	,	PUNCT
ispiv-39	111	5	since	since	SCONJ
ispiv-39	111	6	the	the	DET
ispiv-39	111	7	rotors	rotor	NOUN
ispiv-39	111	8	were	be	AUX
ispiv-39	111	9	mounted	mount	VERB
ispiv-39	111	10	on	on	ADP
ispiv-39	111	11	two	two	NUM
ispiv-39	111	12	separated	separate	VERB
ispiv-39	111	13	stages	stage	NOUN
ispiv-39	111	14	,	,	PUNCT
ispiv-39	111	15	the	the	DET
ispiv-39	111	16	significant	significant	ADJ
ispiv-39	111	17	augmentation	augmentation	NOUN
ispiv-39	111	18	in	in	ADP
ispiv-39	111	19	force	force	NOUN
ispiv-39	111	20	fluctuation	fluctuation	NOUN
ispiv-39	111	21	for	for	ADP
ispiv-39	111	22	the	the	DET
ispiv-39	111	23	l=	l=	ADJ
ispiv-39	111	24	0.05d	0.05d	PROPN
ispiv-39	111	25	case	case	NOUN
ispiv-39	111	26	was	be	AUX
ispiv-39	111	27	believed	believe	VERB
ispiv-39	111	28	to	to	PART
ispiv-39	111	29	be	be	AUX
ispiv-39	111	30	only	only	ADV
ispiv-39	111	31	caused	cause	VERB
ispiv-39	111	32	by	by	ADP
ispiv-39	111	33	the	the	DET
ispiv-39	111	34	intensified	intensify	VERB
ispiv-39	111	35	flow	flow	NOUN
ispiv-39	111	36	interactions	interaction	NOUN
ispiv-39	111	37	rather	rather	ADV
ispiv-39	111	38	than	than	ADP
ispiv-39	111	39	mechanical	mechanical	ADJ
ispiv-39	111	40	vibrations	vibration	NOUN
ispiv-39	111	41	induced	induce	VERB
ispiv-39	111	42	by	by	ADP
ispiv-39	111	43	the	the	DET
ispiv-39	111	44	second	second	ADJ
ispiv-39	111	45	rotor	rotor	NOUN
ispiv-39	111	46	.	.	PUNCT
ispiv-39	112	1	it	it	PRON
ispiv-39	112	2	should	should	AUX
ispiv-39	112	3	also	also	ADV
ispiv-39	112	4	be	be	AUX
ispiv-39	112	5	noted	note	VERB
ispiv-39	112	6	that	that	SCONJ
ispiv-39	112	7	for	for	ADP
ispiv-39	112	8	l	l	PROPN
ispiv-39	112	9	>	>	X
ispiv-39	112	10	0.5d	0.5d	PROPN
ispiv-39	112	11	,	,	PUNCT
ispiv-39	112	12	the	the	DET
ispiv-39	112	13	thrust	thrust	ADJ
ispiv-39	112	14	fluctuation	fluctuation	NOUN
ispiv-39	112	15	for	for	ADP
ispiv-39	112	16	the	the	DET
ispiv-39	112	17	twin	twin	ADJ
ispiv-39	112	18	-	-	PUNCT
ispiv-39	112	19	rotor	rotor	NOUN
ispiv-39	112	20	case	case	NOUN
ispiv-39	112	21	mitigated	mitigate	VERB
ispiv-39	112	22	greatly	greatly	ADV
ispiv-39	112	23	and	and	CCONJ
ispiv-39	112	24	eventually	eventually	ADV
ispiv-39	112	25	reached	reach	VERB
ispiv-39	112	26	a	a	DET
ispiv-39	112	27	similar	similar	ADJ
ispiv-39	112	28	level	level	NOUN
ispiv-39	112	29	with	with	ADP
ispiv-39	112	30	that	that	PRON
ispiv-39	112	31	of	of	ADP
ispiv-39	112	32	the	the	DET
ispiv-39	112	33	single	single	ADJ
ispiv-39	112	34	case	case	NOUN
ispiv-39	112	35	.	.	PUNCT
ispiv-39	113	1	in	in	ADP
ispiv-39	113	2	general	general	ADJ
ispiv-39	113	3	,	,	PUNCT
ispiv-39	113	4	the	the	DET
ispiv-39	113	5	rotor	rotor	NOUN
ispiv-39	113	6	interaction	interaction	NOUN
ispiv-39	113	7	effect	effect	NOUN
ispiv-39	113	8	becomes	become	VERB
ispiv-39	113	9	negligible	negligible	ADJ
ispiv-39	113	10	as	as	ADP
ispiv-39	113	11	l	l	NOUN
ispiv-39	113	12	larger	large	ADJ
ispiv-39	113	13	than	than	ADP
ispiv-39	113	14	1.0d	1.0d	NOUN
ispiv-39	113	15	.	.	PUNCT
ispiv-39	114	1	(	(	PUNCT
ispiv-39	114	2	a	a	X
ispiv-39	114	3	)	)	PUNCT
ispiv-39	114	4	.	.	PUNCT
ispiv-39	115	1	mean	mean	VERB
ispiv-39	115	2	thrust	thrust	PROPN
ispiv-39	115	3	coefficient	coefficient	NOUN
ispiv-39	115	4	(	(	PUNCT
ispiv-39	115	5	b	b	NOUN
ispiv-39	115	6	)	)	PUNCT
ispiv-39	115	7	.	.	PUNCT
ispiv-39	116	1	standard	standard	ADJ
ispiv-39	116	2	deviation	deviation	NOUN
ispiv-39	116	3	of	of	ADP
ispiv-39	116	4	the	the	DET
ispiv-39	116	5	measured	measure	VERB
ispiv-39	116	6	thrust	thrust	NOUN
ispiv-39	116	7	figure	figure	NOUN
ispiv-39	116	8	3	3	NUM
ispiv-39	116	9	.	.	PUNCT
ispiv-39	116	10	effects	effect	NOUN
ispiv-39	116	11	of	of	ADP
ispiv-39	116	12	separation	separation	NOUN
ispiv-39	116	13	distance	distance	NOUN
ispiv-39	116	14	on	on	ADP
ispiv-39	116	15	the	the	DET
ispiv-39	116	16	mean	mean	ADJ
ispiv-39	116	17	thrust	thrust	NOUN
ispiv-39	116	18	coefficient	coefficient	NOUN
ispiv-39	116	19	(	(	PUNCT
ispiv-39	116	20	a	a	NOUN
ispiv-39	116	21	)	)	PUNCT
ispiv-39	116	22	and	and	CCONJ
ispiv-39	116	23	standard	standard	ADJ
ispiv-39	116	24	deviation	deviation	NOUN
ispiv-39	116	25	(	(	PUNCT
ispiv-39	116	26	b	b	NOUN
ispiv-39	116	27	)	)	PUNCT
ispiv-39	116	28	of	of	ADP
ispiv-39	116	29	monitored	monitor	VERB
ispiv-39	116	30	rotor	rotor	NOUN
ispiv-39	116	31	in	in	ADP
ispiv-39	116	32	twin	twin	ADJ
ispiv-39	116	33	-	-	PUNCT
ispiv-39	116	34	rotor	rotor	NOUN
ispiv-39	116	35	case	case	NOUN
ispiv-39	116	36	,	,	PUNCT
ispiv-39	116	37	where	where	SCONJ
ispiv-39	116	38	the	the	DET
ispiv-39	116	39	thrust	thrust	ADJ
ispiv-39	116	40	coefficient	coefficient	NOUN
ispiv-39	116	41	and	and	CCONJ
ispiv-39	116	42	standard	standard	ADJ
ispiv-39	116	43	deviation	deviation	NOUN
ispiv-39	116	44	of	of	ADP
ispiv-39	116	45	single	single	ADJ
ispiv-39	116	46	rotor	rotor	NOUN
ispiv-39	116	47	(	(	PUNCT
ispiv-39	116	48	i.e.	i.e.	X
ispiv-39	116	49	,	,	PUNCT
ispiv-39	116	50	baseline	baseline	NOUN
ispiv-39	116	51	case	case	NOUN
ispiv-39	116	52	)	)	PUNCT
ispiv-39	116	53	are	be	AUX
ispiv-39	116	54	0.013	0.013	NUM
ispiv-39	116	55	n	n	NOUN
ispiv-39	116	56	and	and	CCONJ
ispiv-39	116	57	0.21	0.21	NUM
ispiv-39	116	58	n	n	CCONJ
ispiv-39	116	59	,	,	PUNCT
ispiv-39	116	60	respectively	respectively	ADV
ispiv-39	116	61	.	.	PUNCT
ispiv-39	117	1	b.	b.	PROPN
ispiv-39	117	2	sound	sound	PROPN
ispiv-39	117	3	measurement	measurement	PROPN
ispiv-39	117	4	results	result	VERB
ispiv-39	117	5	the	the	DET
ispiv-39	117	6	twin	twin	ADJ
ispiv-39	117	7	-	-	PUNCT
ispiv-39	117	8	rotor	rotor	NOUN
ispiv-39	117	9	configuration	configuration	NOUN
ispiv-39	117	10	was	be	AUX
ispiv-39	117	11	then	then	ADV
ispiv-39	117	12	investigated	investigate	VERB
ispiv-39	117	13	to	to	PART
ispiv-39	117	14	identify	identify	VERB
ispiv-39	117	15	the	the	DET
ispiv-39	117	16	rotor	rotor	NOUN
ispiv-39	117	17	interaction	interaction	NOUN
ispiv-39	117	18	effect	effect	NOUN
ispiv-39	117	19	on	on	ADP
ispiv-39	117	20	the	the	DET
ispiv-39	117	21	aeroacoustic	aeroacoustic	ADJ
ispiv-39	117	22	performance	performance	NOUN
ispiv-39	117	23	of	of	ADP
ispiv-39	117	24	small	small	ADJ
ispiv-39	117	25	uavs	uavs	NOUN
ispiv-39	117	26	.	.	PUNCT
ispiv-39	118	1	the	the	DET
ispiv-39	118	2	experiment	experiment	NOUN
ispiv-39	118	3	was	be	AUX
ispiv-39	118	4	performed	perform	VERB
ispiv-39	118	5	in	in	ADP
ispiv-39	118	6	an	an	DET
ispiv-39	118	7	anechoic	anechoic	ADJ
ispiv-39	118	8	chamber	chamber	NOUN
ispiv-39	118	9	located	locate	VERB
ispiv-39	118	10	at	at	ADP
ispiv-39	118	11	iowa	iowa	PROPN
ispiv-39	118	12	state	state	PROPN
ispiv-39	118	13	university	university	PROPN
ispiv-39	118	14	.	.	PUNCT
ispiv-39	119	1	figure	figure	NOUN
ispiv-39	119	2	4	4	NUM
ispiv-39	119	3	represents	represent	VERB
ispiv-39	119	4	the	the	DET
ispiv-39	119	5	measured	measure	VERB
ispiv-39	119	6	sound	sound	NOUN
ispiv-39	119	7	pressure	pressure	NOUN
ispiv-39	119	8	level	level	NOUN
ispiv-39	119	9	(	(	PUNCT
ispiv-39	119	10	i.e.	i.e.	X
ispiv-39	119	11	,	,	PUNCT
ispiv-39	119	12	spl	spl	PROPN
ispiv-39	119	13	)	)	PUNCT
ispiv-39	119	14	distributions	distribution	NOUN
ispiv-39	119	15	at	at	ADP
ispiv-39	119	16	various	various	ADJ
ispiv-39	119	17	separation	separation	NOUN
ispiv-39	119	18	distances	distance	NOUN
ispiv-39	119	19	(	(	PUNCT
ispiv-39	119	20	i.e.	i.e.	X
ispiv-39	119	21	,	,	PUNCT
ispiv-39	119	22	l	l	NOUN
ispiv-39	119	23	=	=	SYM
ispiv-39	119	24	0.05d	0.05d	PROPN
ispiv-39	119	25	,	,	PUNCT
ispiv-39	119	26	0.2d	0.2d	NOUN
ispiv-39	119	27	,	,	PUNCT
ispiv-39	119	28	1.0d	1.0d	NOUN
ispiv-39	119	29	)	)	PUNCT
ispiv-39	119	30	.	.	PUNCT
ispiv-39	120	1	the	the	DET
ispiv-39	120	2	microphone	microphone	NOUN
ispiv-39	120	3	was	be	AUX
ispiv-39	120	4	installed	instal	VERB
ispiv-39	120	5	at	at	ADP
ispiv-39	120	6	five	five	NUM
ispiv-39	120	7	different	different	ADJ
ispiv-39	120	8	azimuthal	azimuthal	NOUN
ispiv-39	120	9	positions	position	NOUN
ispiv-39	120	10	(	(	PUNCT
ispiv-39	120	11	i.e.	i.e.	X
ispiv-39	120	12	,	,	PUNCT
ispiv-39	120	13	β	β	X
ispiv-39	120	14	=	=	NOUN
ispiv-39	120	15	60	60	NUM
ispiv-39	120	16	°	°	NUM
ispiv-39	120	17	,	,	PUNCT
ispiv-39	120	18	90	90	NUM
ispiv-39	120	19	°	°	NOUN
ispiv-39	120	20	,	,	PUNCT
ispiv-39	120	21	120	120	NUM
ispiv-39	120	22	°	°	NOUN
ispiv-39	120	23	,	,	PUNCT
ispiv-39	120	24	150	150	NUM
ispiv-39	120	25	°	°	NOUN
ispiv-39	120	26	,	,	PUNCT
ispiv-39	120	27	180	180	NUM
ispiv-39	120	28	°	°	NUM
ispiv-39	120	29	)	)	PUNCT
ispiv-39	120	30	,	,	PUNCT
ispiv-39	120	31	which	which	PRON
ispiv-39	120	32	were	be	AUX
ispiv-39	120	33	6d	6d	NUM
ispiv-39	120	34	away	away	ADV
ispiv-39	120	35	from	from	ADP
ispiv-39	120	36	the	the	DET
ispiv-39	120	37	center	center	NOUN
ispiv-39	120	38	and	and	CCONJ
ispiv-39	120	39	can	can	AUX
ispiv-39	120	40	be	be	AUX
ispiv-39	120	41	approximately	approximately	ADV
ispiv-39	120	42	treated	treat	VERB
ispiv-39	120	43	as	as	ADP
ispiv-39	120	44	far	far	ADJ
ispiv-39	120	45	-	-	PUNCT
ispiv-39	120	46	field	field	NOUN
ispiv-39	120	47	locations	location	NOUN
ispiv-39	120	48	.	.	PUNCT
ispiv-39	121	1	note	note	VERB
ispiv-39	121	2	that	that	SCONJ
ispiv-39	121	3	,	,	PUNCT
ispiv-39	121	4	the	the	DET
ispiv-39	121	5	spl	spl	PROPN
ispiv-39	121	6	results	result	NOUN
ispiv-39	121	7	displayed	display	VERB
ispiv-39	121	8	in	in	ADP
ispiv-39	121	9	fig	fig	NOUN
ispiv-39	121	10	.	.	PUNCT
ispiv-39	122	1	4	4	NUM
ispiv-39	122	2	were	be	AUX
ispiv-39	122	3	the	the	DET
ispiv-39	122	4	result	result	NOUN
ispiv-39	122	5	of	of	ADP
ispiv-39	122	6	the	the	DET
ispiv-39	122	7	integration	integration	NOUN
ispiv-39	122	8	of	of	ADP
ispiv-39	122	9	the	the	DET
ispiv-39	122	10	energy	energy	NOUN
ispiv-39	122	11	spectrum	spectrum	NOUN
ispiv-39	122	12	starting	start	VERB
ispiv-39	122	13	from	from	ADP
ispiv-39	122	14	20	20	NUM
ispiv-39	122	15	hz	hz	NOUN
ispiv-39	122	16	to	to	ADP
ispiv-39	122	17	20,000	20,000	NUM
ispiv-39	122	18	hz	hz	NOUN
ispiv-39	122	19	.	.	PUNCT
ispiv-39	123	1	as	as	SCONJ
ispiv-39	123	2	shown	show	VERB
ispiv-39	123	3	clearly	clearly	ADV
ispiv-39	123	4	in	in	ADP
ispiv-39	123	5	fig	fig	NOUN
ispiv-39	123	6	.	.	PUNCT
ispiv-39	124	1	4	4	NUM
ispiv-39	124	2	,	,	PUNCT
ispiv-39	124	3	the	the	DET
ispiv-39	124	4	measured	measured	ADJ
ispiv-39	124	5	spls	spls	NOUN
ispiv-39	124	6	were	be	AUX
ispiv-39	124	7	found	find	VERB
ispiv-39	124	8	to	to	PART
ispiv-39	124	9	increase	increase	VERB
ispiv-39	124	10	monotonously	monotonously	ADV
ispiv-39	124	11	as	as	SCONJ
ispiv-39	124	12	the	the	DET
ispiv-39	124	13	azimuthal	azimuthal	NOUN
ispiv-39	124	14	angles	angle	NOUN
ispiv-39	124	15	increased	increase	VERB
ispiv-39	124	16	from	from	ADP
ispiv-39	124	17	90	90	NUM
ispiv-39	124	18	°	°	NOUN
ispiv-39	124	19	to	to	ADP
ispiv-39	124	20	180	180	NUM
ispiv-39	124	21	°	°	NOUN
ispiv-39	124	22	,	,	PUNCT
ispiv-39	124	23	reached	reach	VERB
ispiv-39	124	24	highest	high	ADJ
ispiv-39	124	25	levels	level	NOUN
ispiv-39	124	26	at	at	ADP
ispiv-39	124	27	position	position	NOUN
ispiv-39	124	28	right	right	ADV
ispiv-39	124	29	ahead	ahead	ADV
ispiv-39	124	30	of	of	ADP
ispiv-39	124	31	the	the	DET
ispiv-39	124	32	rotors	rotor	NOUN
ispiv-39	124	33	,	,	PUNCT
ispiv-39	124	34	while	while	SCONJ
ispiv-39	124	35	exhibited	exhibit	VERB
ispiv-39	124	36	smallest	small	ADJ
ispiv-39	124	37	values	value	NOUN
ispiv-39	124	38	by	by	ADP
ispiv-39	124	39	the	the	DET
ispiv-39	124	40	side	side	NOUN
ispiv-39	124	41	of	of	ADP
ispiv-39	124	42	rotor	rotor	NOUN
ispiv-39	124	43	.	.	PUNCT
ispiv-39	125	1	it	it	PRON
ispiv-39	125	2	is	be	AUX
ispiv-39	125	3	well	well	ADV
ispiv-39	125	4	known	know	VERB
ispiv-39	125	5	that	that	SCONJ
ispiv-39	125	6	the	the	DET
ispiv-39	125	7	noise	noise	NOUN
ispiv-39	125	8	map	map	NOUN
ispiv-39	125	9	around	around	ADP
ispiv-39	125	10	a	a	DET
ispiv-39	125	11	single	single	ADJ
ispiv-39	125	12	rotor	rotor	NOUN
ispiv-39	125	13	features	feature	VERB
ispiv-39	125	14	a	a	DET
ispiv-39	125	15	dipole	dipole	NOUN
ispiv-39	125	16	distribution	distribution	NOUN
ispiv-39	125	17	(	(	PUNCT
ispiv-39	125	18	i.e.	i.e.	X
ispiv-39	125	19	,	,	PUNCT
ispiv-39	125	20	symmetric	symmetric	ADJ
ispiv-39	125	21	along	along	ADP
ispiv-39	125	22	the	the	DET
ispiv-39	125	23	rotor	rotor	NOUN
ispiv-39	125	24	plane	plane	NOUN
ispiv-39	125	25	)	)	PUNCT
ispiv-39	125	26	(	(	PUNCT
ispiv-39	125	27	blackstock	blackstock	PROPN
ispiv-39	125	28	2000	2000	NUM
ispiv-39	125	29	)	)	PUNCT
ispiv-39	125	30	.	.	PUNCT
ispiv-39	126	1	it	it	PRON
ispiv-39	126	2	would	would	AUX
ispiv-39	126	3	reach	reach	VERB
ispiv-39	126	4	a	a	DET
ispiv-39	126	5	maximum	maximum	ADJ
ispiv-39	126	6	noise	noise	NOUN
ispiv-39	126	7	level	level	NOUN
ispiv-39	126	8	at	at	ADP
ispiv-39	126	9	the	the	DET
ispiv-39	126	10	positions	position	NOUN
ispiv-39	126	11	right	right	ADV
ispiv-39	126	12	ahead	ahead	ADV
ispiv-39	126	13	or	or	CCONJ
ispiv-39	126	14	behind	behind	ADP
ispiv-39	126	15	the	the	DET
ispiv-39	126	16	rotor	rotor	NOUN
ispiv-39	126	17	(	(	PUNCT
ispiv-39	126	18	i.e.	i.e.	X
ispiv-39	126	19	,	,	PUNCT
ispiv-39	126	20	β	β	X
ispiv-39	126	21	=	=	SYM
ispiv-39	126	22	0	0	NUM
ispiv-39	126	23	°	°	NUM
ispiv-39	126	24	,	,	PUNCT
ispiv-39	126	25	180	180	NUM
ispiv-39	126	26	°	°	NUM
ispiv-39	126	27	)	)	PUNCT
ispiv-39	126	28	but	but	CCONJ
ispiv-39	126	29	minimum	minimum	NOUN
ispiv-39	126	30	noise	noise	NOUN
ispiv-39	126	31	at	at	ADP
ispiv-39	126	32	the	the	DET
ispiv-39	126	33	side	side	NOUN
ispiv-39	126	34	positions	position	NOUN
ispiv-39	126	35	(	(	PUNCT
ispiv-39	126	36	i.e.	i.e.	X
ispiv-39	126	37	,	,	PUNCT
ispiv-39	126	38	β	β	X
ispiv-39	126	39	=	=	NOUN
ispiv-39	126	40	90	90	NUM
ispiv-39	126	41	°	°	NUM
ispiv-39	126	42	,	,	PUNCT
ispiv-39	126	43	270	270	NUM
ispiv-39	126	44	°	°	NUM
ispiv-39	126	45	)	)	PUNCT
ispiv-39	126	46	.	.	PUNCT
ispiv-39	127	1	as	as	ADP
ispiv-39	127	2	for	for	ADP
ispiv-39	127	3	the	the	DET
ispiv-39	127	4	twin	twin	ADJ
ispiv-39	127	5	-	-	PUNCT
ispiv-39	127	6	rotor	rotor	NOUN
ispiv-39	127	7	configuration	configuration	NOUN
ispiv-39	127	8	,	,	PUNCT
ispiv-39	127	9	it	it	PRON
ispiv-39	127	10	can	can	AUX
ispiv-39	127	11	be	be	AUX
ispiv-39	127	12	treated	treat	VERB
ispiv-39	127	13	as	as	ADP
ispiv-39	127	14	quasi	quasi	ADJ
ispiv-39	127	15	-	-	ADJ
ispiv-39	127	16	dipole	dipole	ADJ
ispiv-39	127	17	distribution	distribution	NOUN
ispiv-39	127	18	due	due	ADP
ispiv-39	127	19	to	to	ADP
ispiv-39	127	20	the	the	DET
ispiv-39	127	21	relatively	relatively	ADV
ispiv-39	127	22	small	small	ADJ
ispiv-39	127	23	gaps	gap	NOUN
ispiv-39	127	24	within	within	ADP
ispiv-39	127	25	the	the	DET
ispiv-39	127	26	rotors	rotor	NOUN
ispiv-39	127	27	compared	compare	VERB
ispiv-39	127	28	to	to	ADP
ispiv-39	127	29	the	the	DET
ispiv-39	127	30	microphone	microphone	NOUN
ispiv-39	127	31	locations	location	NOUN
ispiv-39	127	32	.	.	PUNCT
ispiv-39	128	1	it	it	PRON
ispiv-39	128	2	should	should	AUX
ispiv-39	128	3	also	also	ADV
ispiv-39	128	4	be	be	AUX
ispiv-39	128	5	noted	note	VERB
ispiv-39	128	6	that	that	SCONJ
ispiv-39	128	7	as	as	SCONJ
ispiv-39	128	8	the	the	DET
ispiv-39	128	9	separation	separation	NOUN
ispiv-39	128	10	distance	distance	NOUN
ispiv-39	128	11	becomes	become	VERB
ispiv-39	128	12	smaller	small	ADJ
ispiv-39	128	13	,	,	PUNCT
ispiv-39	128	14	the	the	DET
ispiv-39	128	15	measured	measured	ADJ
ispiv-39	128	16	spls	spls	NOUN
ispiv-39	128	17	would	would	AUX
ispiv-39	128	18	gradually	gradually	ADV
ispiv-39	128	19	increase	increase	VERB
ispiv-39	128	20	.	.	PUNCT
ispiv-39	129	1	a	a	DET
ispiv-39	129	2	maximum	maximum	ADJ
ispiv-39	129	3	enhancement	enhancement	NOUN
ispiv-39	129	4	of	of	ADP
ispiv-39	129	5	about	about	ADV
ispiv-39	129	6	3	3	NUM
ispiv-39	129	7	db	db	NOUN
ispiv-39	129	8	can	can	AUX
ispiv-39	129	9	be	be	AUX
ispiv-39	129	10	observed	observe	VERB
ispiv-39	129	11	for	for	ADP
ispiv-39	129	12	the	the	DET
ispiv-39	129	13	l	l	NOUN
ispiv-39	129	14	=	=	SYM
ispiv-39	129	15	0.05d	0.05d	PROPN
ispiv-39	129	16	case	case	NOUN
ispiv-39	129	17	in	in	ADP
ispiv-39	129	18	comparison	comparison	NOUN
ispiv-39	129	19	to	to	ADP
ispiv-39	129	20	the	the	DET
ispiv-39	129	21	l	l	NOUN
ispiv-39	129	22	=	=	SYM
ispiv-39	129	23	1.0d	1.0d	NOUN
ispiv-39	129	24	case	case	NOUN
ispiv-39	129	25	at	at	ADP
ispiv-39	129	26	β	β	X
ispiv-39	129	27	=	=	SYM
ispiv-39	129	28	180	180	NUM
ispiv-39	129	29	°	°	NOUN
ispiv-39	129	30	,	,	PUNCT
ispiv-39	129	31	which	which	PRON
ispiv-39	129	32	is	be	AUX
ispiv-39	129	33	believed	believe	VERB
ispiv-39	129	34	to	to	PART
ispiv-39	129	35	be	be	AUX
ispiv-39	129	36	caused	cause	VERB
ispiv-39	129	37	by	by	ADP
ispiv-39	129	38	the	the	DET
ispiv-39	129	39	enhanced	enhance	VERB
ispiv-39	129	40	rotorto	rotorto	NOUN
ispiv-39	129	41	-	-	PUNCT
ispiv-39	129	42	rotor	rotor	NOUN
ispiv-39	129	43	interactions	interaction	NOUN
ispiv-39	129	44	.	.	PUNCT
ispiv-39	130	1	figure	figure	NOUN
ispiv-39	130	2	4	4	NUM
ispiv-39	130	3	.	.	PUNCT
ispiv-39	131	1	spl	spl	PROPN
ispiv-39	131	2	distributions	distribution	NOUN
ispiv-39	131	3	measured	measure	VERB
ispiv-39	131	4	at	at	ADP
ispiv-39	131	5	6d	6d	NUM
ispiv-39	131	6	away	away	ADV
ispiv-39	131	7	from	from	ADP
ispiv-39	131	8	the	the	DET
ispiv-39	131	9	center	center	NOUN
ispiv-39	131	10	of	of	ADP
ispiv-39	131	11	the	the	DET
ispiv-39	131	12	twin	twin	ADJ
ispiv-39	131	13	-	-	PUNCT
ispiv-39	131	14	rotor	rotor	NOUN
ispiv-39	131	15	configuration	configuration	NOUN
ispiv-39	131	16	.	.	PUNCT
ispiv-39	132	1	a	a	DET
ispiv-39	132	2	spectrum	spectrum	NOUN
ispiv-39	132	3	analysis	analysis	NOUN
ispiv-39	132	4	was	be	AUX
ispiv-39	132	5	performed	perform	VERB
ispiv-39	132	6	to	to	PART
ispiv-39	132	7	uncover	uncover	VERB
ispiv-39	132	8	the	the	DET
ispiv-39	132	9	noise	noise	NOUN
ispiv-39	132	10	enhancement	enhancement	NOUN
ispiv-39	132	11	in	in	ADP
ispiv-39	132	12	terms	term	NOUN
ispiv-39	132	13	of	of	ADP
ispiv-39	132	14	tonal	tonal	ADJ
ispiv-39	132	15	noise	noise	NOUN
ispiv-39	132	16	and	and	CCONJ
ispiv-39	132	17	broadband	broadband	NOUN
ispiv-39	132	18	noise	noise	NOUN
ispiv-39	132	19	.	.	PUNCT
ispiv-39	133	1	figure	figure	NOUN
ispiv-39	133	2	5	5	NUM
ispiv-39	133	3	shows	show	VERB
ispiv-39	133	4	the	the	DET
ispiv-39	133	5	measured	measured	ADJ
ispiv-39	133	6	sound	sound	NOUN
ispiv-39	133	7	spectrums	spectrum	NOUN
ispiv-39	133	8	as	as	ADP
ispiv-39	133	9	a	a	DET
ispiv-39	133	10	function	function	NOUN
ispiv-39	133	11	of	of	ADP
ispiv-39	133	12	blade	blade	NOUN
ispiv-39	133	13	passing	pass	VERB
ispiv-39	133	14	frequency	frequency	NOUN
ispiv-39	133	15	harmonics	harmonic	NOUN
ispiv-39	133	16	at	at	ADP
ispiv-39	133	17	azimuthal	azimuthal	NOUN
ispiv-39	133	18	angles	angle	NOUN
ispiv-39	133	19	of	of	ADP
ispiv-39	133	20	β	β	NOUN
ispiv-39	133	21	=	=	NOUN
ispiv-39	133	22	120	120	NUM
ispiv-39	133	23	°	°	NUM
ispiv-39	133	24	and	and	CCONJ
ispiv-39	133	25	180	180	NUM
ispiv-39	133	26	°	°	NOUN
ispiv-39	133	27	.	.	PUNCT
ispiv-39	134	1	clearly	clearly	ADV
ispiv-39	134	2	,	,	PUNCT
ispiv-39	134	3	the	the	DET
ispiv-39	134	4	measured	measured	ADJ
ispiv-39	134	5	spls	spls	NOUN
ispiv-39	134	6	for	for	ADP
ispiv-39	134	7	the	the	DET
ispiv-39	134	8	l	l	NOUN
ispiv-39	134	9	=	=	SYM
ispiv-39	134	10	0.05d	0.05d	PROPN
ispiv-39	134	11	case	case	NOUN
ispiv-39	134	12	were	be	AUX
ispiv-39	134	13	found	find	VERB
ispiv-39	134	14	to	to	PART
ispiv-39	134	15	be	be	AUX
ispiv-39	134	16	much	much	ADV
ispiv-39	134	17	higher	high	ADJ
ispiv-39	134	18	than	than	ADP
ispiv-39	134	19	that	that	PRON
ispiv-39	134	20	of	of	ADP
ispiv-39	134	21	the	the	DET
ispiv-39	134	22	l	l	NOUN
ispiv-39	134	23	=	=	SYM
ispiv-39	134	24	1.0d	1.0d	NOUN
ispiv-39	134	25	case	case	NOUN
ispiv-39	134	26	at	at	ADP
ispiv-39	134	27	the	the	DET
ispiv-39	134	28	integral	integral	ADJ
ispiv-39	134	29	multiple	multiple	NOUN
ispiv-39	134	30	of	of	ADP
ispiv-39	134	31	the	the	DET
ispiv-39	134	32	bpf	bpf	NOUN
ispiv-39	134	33	(	(	PUNCT
ispiv-39	134	34	i.e.	i.e.	X
ispiv-39	134	35	,	,	PUNCT
ispiv-39	134	36	bpf	bpf	PROPN
ispiv-39	134	37	,	,	PUNCT
ispiv-39	134	38	bpf2	bpf2	PROPN
ispiv-39	134	39	…	…	PUNCT
ispiv-39	134	40	)	)	PUNCT
ispiv-39	134	41	,	,	PUNCT
ispiv-39	134	42	indicating	indicate	VERB
ispiv-39	134	43	an	an	DET
ispiv-39	134	44	enhanced	enhanced	ADJ
ispiv-39	134	45	tonal	tonal	ADJ
ispiv-39	134	46	noise	noise	NOUN
ispiv-39	134	47	component	component	NOUN
ispiv-39	134	48	around	around	ADP
ispiv-39	134	49	the	the	DET
ispiv-39	134	50	uav	uav	PROPN
ispiv-39	134	51	rotors	rotor	NOUN
ispiv-39	134	52	.	.	PUNCT
ispiv-39	135	1	for	for	ADP
ispiv-39	135	2	incompressible	incompressible	ADJ
ispiv-39	135	3	flow	flow	NOUN
ispiv-39	135	4	condition	condition	NOUN
ispiv-39	135	5	,	,	PUNCT
ispiv-39	135	6	tonal	tonal	ADJ
ispiv-39	135	7	noise	noise	NOUN
ispiv-39	135	8	is	be	AUX
ispiv-39	135	9	dominated	dominate	VERB
ispiv-39	135	10	by	by	ADP
ispiv-39	135	11	the	the	DET
ispiv-39	135	12	loading	loading	NOUN
ispiv-39	135	13	noise	noise	NOUN
ispiv-39	135	14	(	(	PUNCT
ispiv-39	135	15	blackstock	blackstock	PROPN
ispiv-39	135	16	2000	2000	NUM
ispiv-39	135	17	)	)	PUNCT
ispiv-39	135	18	,	,	PUNCT
ispiv-39	135	19	which	which	PRON
ispiv-39	135	20	is	be	AUX
ispiv-39	135	21	directly	directly	ADV
ispiv-39	135	22	associated	associate	VERB
ispiv-39	135	23	with	with	ADP
ispiv-39	135	24	the	the	DET
ispiv-39	135	25	dynamic	dynamic	ADJ
ispiv-39	135	26	loading	loading	NOUN
ispiv-39	135	27	of	of	ADP
ispiv-39	135	28	the	the	DET
ispiv-39	135	29	rotor	rotor	NOUN
ispiv-39	135	30	blade	blade	NOUN
ispiv-39	135	31	.	.	PUNCT
ispiv-39	136	1	therefore	therefore	ADV
ispiv-39	136	2	,	,	PUNCT
ispiv-39	136	3	the	the	DET
ispiv-39	136	4	augmented	augment	VERB
ispiv-39	136	5	tonal	tonal	ADJ
ispiv-39	136	6	noise	noise	NOUN
ispiv-39	136	7	for	for	ADP
ispiv-39	136	8	the	the	DET
ispiv-39	136	9	l	l	NOUN
ispiv-39	136	10	=	=	SYM
ispiv-39	136	11	0.05d	0.05d	PROPN
ispiv-39	136	12	case	case	NOUN
ispiv-39	136	13	is	be	AUX
ispiv-39	136	14	believed	believe	VERB
ispiv-39	136	15	to	to	PART
ispiv-39	136	16	be	be	AUX
ispiv-39	136	17	caused	cause	VERB
ispiv-39	136	18	by	by	ADP
ispiv-39	136	19	the	the	DET
ispiv-39	136	20	intensified	intensify	VERB
ispiv-39	136	21	thrust	thrust	NOUN
ispiv-39	136	22	fluctuations	fluctuation	NOUN
ispiv-39	136	23	as	as	SCONJ
ispiv-39	136	24	mentioned	mention	VERB
ispiv-39	136	25	in	in	ADP
ispiv-39	136	26	fig	fig	NOUN
ispiv-39	136	27	.	.	PUNCT
ispiv-39	137	1	3	3	X
ispiv-39	137	2	.	.	X
ispiv-39	138	1	it	it	PRON
ispiv-39	138	2	is	be	AUX
ispiv-39	138	3	worth	worth	ADJ
ispiv-39	138	4	mentioned	mention	VERB
ispiv-39	138	5	that	that	SCONJ
ispiv-39	138	6	the	the	DET
ispiv-39	138	7	high	high	ADJ
ispiv-39	138	8	sparks	spark	VERB
ispiv-39	138	9	at	at	ADP
ispiv-39	138	10	bpf	bpf	NOUN
ispiv-39	138	11	≈	≈	PROPN
ispiv-39	138	12	20	20	NUM
ispiv-39	138	13	were	be	AUX
ispiv-39	138	14	confirmed	confirm	VERB
ispiv-39	138	15	to	to	PART
ispiv-39	138	16	be	be	AUX
ispiv-39	138	17	the	the	DET
ispiv-39	138	18	signal	signal	NOUN
ispiv-39	138	19	from	from	ADP
ispiv-39	138	20	the	the	DET
ispiv-39	138	21	electronic	electronic	ADJ
ispiv-39	138	22	motors	motor	NOUN
ispiv-39	138	23	that	that	PRON
ispiv-39	138	24	used	use	VERB
ispiv-39	138	25	to	to	PART
ispiv-39	138	26	drive	drive	VERB
ispiv-39	138	27	the	the	DET
ispiv-39	138	28	rotors	rotor	NOUN
ispiv-39	138	29	during	during	ADP
ispiv-39	138	30	the	the	DET
ispiv-39	138	31	experiment	experiment	NOUN
ispiv-39	138	32	.	.	PUNCT
ispiv-39	139	1	compared	compare	VERB
ispiv-39	139	2	to	to	ADP
ispiv-39	139	3	the	the	DET
ispiv-39	139	4	l	l	NOUN
ispiv-39	139	5	=	=	SYM
ispiv-39	139	6	1.0d	1.0d	NOUN
ispiv-39	139	7	case	case	NOUN
ispiv-39	139	8	,	,	PUNCT
ispiv-39	139	9	the	the	DET
ispiv-39	139	10	broadband	broadband	NOUN
ispiv-39	139	11	noises	noise	VERB
ispiv-39	139	12	for	for	ADP
ispiv-39	139	13	the	the	DET
ispiv-39	139	14	l	l	NOUN
ispiv-39	139	15	=	=	PUNCT
ispiv-39	139	16	0.05d	0.05d	PROPN
ispiv-39	139	17	were	be	AUX
ispiv-39	139	18	found	find	VERB
ispiv-39	139	19	to	to	PART
ispiv-39	139	20	increase	increase	VERB
ispiv-39	139	21	mildly	mildly	ADV
ispiv-39	139	22	at	at	ADP
ispiv-39	139	23	the	the	DET
ispiv-39	139	24	azimuthal	azimuthal	ADJ
ispiv-39	139	25	angles	angle	NOUN
ispiv-39	139	26	of	of	ADP
ispiv-39	139	27	β	β	X
ispiv-39	139	28	=	=	NOUN
ispiv-39	139	29	120	120	NUM
ispiv-39	139	30	°	°	NOUN
ispiv-39	139	31	,	,	PUNCT
ispiv-39	139	32	180	180	NUM
ispiv-39	139	33	°	°	NOUN
ispiv-39	139	34	.	.	PUNCT
ispiv-39	140	1	recalling	recall	VERB
ispiv-39	140	2	the	the	DET
ispiv-39	140	3	lighthill	lighthill	NOUN
ispiv-39	140	4	’s	’s	PART
ispiv-39	140	5	stress	stress	NOUN
ispiv-39	140	6	tensor	tensor	NOUN
ispiv-39	140	7	(	(	PUNCT
ispiv-39	140	8	blackstock	blackstock	PROPN
ispiv-39	140	9	2000	2000	NUM
ispiv-39	140	10	)	)	PUNCT
ispiv-39	140	11	,	,	PUNCT
ispiv-39	140	12	the	the	DET
ispiv-39	140	13	broadband	broadband	NOUN
ispiv-39	140	14	noise	noise	NOUN
ispiv-39	140	15	is	be	AUX
ispiv-39	140	16	largely	largely	ADV
ispiv-39	140	17	determined	determine	VERB
ispiv-39	140	18	by	by	ADP
ispiv-39	140	19	the	the	DET
ispiv-39	140	20	complex	complex	ADJ
ispiv-39	140	21	turbulent	turbulent	ADJ
ispiv-39	140	22	flow	flow	NOUN
ispiv-39	140	23	structures	structure	NOUN
ispiv-39	140	24	and	and	CCONJ
ispiv-39	140	25	shear	shear	NOUN
ispiv-39	140	26	layers	layer	NOUN
ispiv-39	140	27	,	,	PUNCT
ispiv-39	140	28	such	such	ADJ
ispiv-39	140	29	as	as	ADP
ispiv-39	140	30	secondary	secondary	ADJ
ispiv-39	140	31	flow	flow	NOUN
ispiv-39	140	32	distortions	distortion	NOUN
ispiv-39	140	33	,	,	PUNCT
ispiv-39	140	34	blade	blade	NOUN
ispiv-39	140	35	trailing	trailing	NOUN
ispiv-39	140	36	edge	edge	NOUN
ispiv-39	140	37	vortices	vortex	NOUN
ispiv-39	140	38	,	,	PUNCT
ispiv-39	140	39	and	and	CCONJ
ispiv-39	140	40	tip	tip	NOUN
ispiv-39	140	41	vortices	vortex	NOUN
ispiv-39	140	42	.	.	PUNCT
ispiv-39	141	1	as	as	SCONJ
ispiv-39	141	2	reported	report	VERB
ispiv-39	141	3	by	by	ADP
ispiv-39	141	4	carolus	carolus	PROPN
ispiv-39	141	5	et	et	PROPN
ispiv-39	141	6	al	al	PROPN
ispiv-39	141	7	.	.	PUNCT
ispiv-39	142	1	(	(	PUNCT
ispiv-39	142	2	carolus	carolus	PROPN
ispiv-39	142	3	et	et	PROPN
ispiv-39	142	4	al	al	PROPN
ispiv-39	142	5	.	.	PROPN
ispiv-39	142	6	2007	2007	NUM
ispiv-39	142	7	)	)	PUNCT
ispiv-39	142	8	,	,	PUNCT
ispiv-39	142	9	turbulent	turbulent	ADJ
ispiv-39	142	10	kinetic	kinetic	ADJ
ispiv-39	142	11	energy	energy	NOUN
ispiv-39	142	12	(	(	PUNCT
ispiv-39	142	13	tke	tke	NOUN
ispiv-39	142	14	)	)	PUNCT
ispiv-39	142	15	is	be	AUX
ispiv-39	142	16	important	important	ADJ
ispiv-39	142	17	parameters	parameter	NOUN
ispiv-39	142	18	that	that	PRON
ispiv-39	142	19	can	can	AUX
ispiv-39	142	20	be	be	AUX
ispiv-39	142	21	used	use	VERB
ispiv-39	142	22	to	to	PART
ispiv-39	142	23	evaluate	evaluate	VERB
ispiv-39	142	24	the	the	DET
ispiv-39	142	25	broadband	broadband	NOUN
ispiv-39	142	26	noise	noise	NOUN
ispiv-39	142	27	level	level	NOUN
ispiv-39	142	28	.	.	PUNCT
ispiv-39	143	1	enhanced	enhance	VERB
ispiv-39	143	2	tke	tke	PROPN
ispiv-39	143	3	level	level	NOUN
ispiv-39	143	4	will	will	AUX
ispiv-39	143	5	lead	lead	VERB
ispiv-39	143	6	to	to	ADP
ispiv-39	143	7	augmented	augment	VERB
ispiv-39	143	8	broadband	broadband	NOUN
ispiv-39	143	9	noise	noise	NOUN
ispiv-39	143	10	.	.	PUNCT
ispiv-39	144	1	therefore	therefore	ADV
ispiv-39	144	2	,	,	PUNCT
ispiv-39	144	3	the	the	DET
ispiv-39	144	4	broadband	broadband	NOUN
ispiv-39	144	5	noise	noise	NOUN
ispiv-39	144	6	measurements	measurement	NOUN
ispiv-39	144	7	in	in	ADP
ispiv-39	144	8	the	the	DET
ispiv-39	144	9	present	present	ADJ
ispiv-39	144	10	study	study	NOUN
ispiv-39	144	11	suggest	suggest	VERB
ispiv-39	144	12	an	an	DET
ispiv-39	144	13	augmented	augment	VERB
ispiv-39	144	14	tke	tke	NOUN
ispiv-39	144	15	level	level	NOUN
ispiv-39	144	16	for	for	ADP
ispiv-39	144	17	the	the	DET
ispiv-39	144	18	twin	twin	ADJ
ispiv-39	144	19	-	-	PUNCT
ispiv-39	144	20	rotor	rotor	NOUN
ispiv-39	144	21	configuration	configuration	NOUN
ispiv-39	144	22	as	as	ADP
ispiv-39	144	23	the	the	DET
ispiv-39	144	24	separation	separation	NOUN
ispiv-39	144	25	distance	distance	NOUN
ispiv-39	144	26	decrease	decrease	NOUN
ispiv-39	144	27	,	,	PUNCT
ispiv-39	144	28	which	which	PRON
ispiv-39	144	29	was	be	AUX
ispiv-39	144	30	confirmed	confirm	VERB
ispiv-39	144	31	by	by	ADP
ispiv-39	144	32	the	the	DET
ispiv-39	144	33	measured	measure	VERB
ispiv-39	144	34	piv	piv	NOUN
ispiv-39	144	35	results	result	NOUN
ispiv-39	144	36	shown	show	VERB
ispiv-39	144	37	below	below	ADP
ispiv-39	144	38	.	.	PUNCT
ispiv-39	145	1	(	(	PUNCT
ispiv-39	145	2	a	a	X
ispiv-39	145	3	)	)	PUNCT
ispiv-39	145	4	β	β	NOUN
ispiv-39	145	5	=	=	SYM
ispiv-39	145	6	120	120	NUM
ispiv-39	145	7	◦	◦	NOUN
ispiv-39	145	8	(	(	PUNCT
ispiv-39	145	9	b	b	NOUN
ispiv-39	145	10	)	)	PUNCT
ispiv-39	145	11	β	β	NOUN
ispiv-39	145	12	=	=	SYM
ispiv-39	145	13	180	180	NUM
ispiv-39	145	14	◦	◦	NOUN
ispiv-39	145	15	figure	figure	NOUN
ispiv-39	145	16	5	5	NUM
ispiv-39	145	17	.	.	PUNCT
ispiv-39	145	18	comparison	comparison	NOUN
ispiv-39	145	19	of	of	ADP
ispiv-39	145	20	the	the	DET
ispiv-39	145	21	measured	measure	VERB
ispiv-39	145	22	sound	sound	NOUN
ispiv-39	145	23	spectrums	spectrum	NOUN
ispiv-39	145	24	between	between	ADP
ispiv-39	145	25	the	the	DET
ispiv-39	145	26	l	l	NOUN
ispiv-39	145	27	=	=	SYM
ispiv-39	145	28	0.05d	0.05d	PROPN
ispiv-39	145	29	and	and	CCONJ
ispiv-39	145	30	the	the	DET
ispiv-39	145	31	l	l	NOUN
ispiv-39	145	32	=	=	SYM
ispiv-39	145	33	1.0d	1.0d	NOUN
ispiv-39	145	34	cases	case	NOUN
ispiv-39	145	35	at	at	ADP
ispiv-39	145	36	azimuthal	azimuthal	ADJ
ispiv-39	145	37	angles	angle	NOUN
ispiv-39	145	38	of	of	ADP
ispiv-39	145	39	120	120	NUM
ispiv-39	145	40	◦	◦	NOUN
ispiv-39	145	41	and	and	CCONJ
ispiv-39	145	42	180	180	NUM
ispiv-39	145	43	◦	◦	NOUN
ispiv-39	145	44	.	.	PUNCT
ispiv-39	146	1	c.	c.	PROPN
ispiv-39	146	2	free	free	ADJ
ispiv-39	146	3	-	-	PUNCT
ispiv-39	146	4	run	run	VERB
ispiv-39	146	5	piv	piv	NOUN
ispiv-39	146	6	measurement	measurement	NOUN
ispiv-39	146	7	results	result	NOUN
ispiv-39	146	8	as	as	SCONJ
ispiv-39	146	9	mentioned	mention	VERB
ispiv-39	146	10	above	above	ADV
ispiv-39	146	11	,	,	PUNCT
ispiv-39	146	12	free	free	ADJ
ispiv-39	146	13	-	-	PUNCT
ispiv-39	146	14	run	run	VERB
ispiv-39	146	15	piv	piv	NOUN
ispiv-39	146	16	measurements	measurement	NOUN
ispiv-39	146	17	were	be	AUX
ispiv-39	146	18	conducted	conduct	VERB
ispiv-39	146	19	in	in	ADP
ispiv-39	146	20	the	the	DET
ispiv-39	146	21	present	present	ADJ
ispiv-39	146	22	study	study	NOUN
ispiv-39	146	23	to	to	PART
ispiv-39	146	24	understand	understand	VERB
ispiv-39	146	25	how	how	SCONJ
ispiv-39	146	26	the	the	DET
ispiv-39	146	27	rotor	rotor	NOUN
ispiv-39	146	28	-	-	PUNCT
ispiv-39	146	29	to	to	ADP
ispiv-39	146	30	-	-	PUNCT
ispiv-39	146	31	rotor	rotor	NOUN
ispiv-39	146	32	interactions	interaction	NOUN
ispiv-39	146	33	affect	affect	VERB
ispiv-39	146	34	the	the	DET
ispiv-39	146	35	aerodynamic	aerodynamic	ADJ
ispiv-39	146	36	and	and	CCONJ
ispiv-39	146	37	aeroacoustic	aeroacoustic	ADJ
ispiv-39	146	38	performances	performance	NOUN
ispiv-39	146	39	of	of	ADP
ispiv-39	146	40	small	small	ADJ
ispiv-39	146	41	uavs	uavs	NOUN
ispiv-39	146	42	.	.	PUNCT
ispiv-39	147	1	figure	figure	NOUN
ispiv-39	147	2	6	6	NUM
ispiv-39	147	3	shows	show	VERB
ispiv-39	147	4	the	the	DET
ispiv-39	147	5	measured	measure	VERB
ispiv-39	147	6	free	free	ADJ
ispiv-39	147	7	-	-	PUNCT
ispiv-39	147	8	run	run	VERB
ispiv-39	147	9	piv	piv	NOUN
ispiv-39	147	10	results	result	NOUN
ispiv-39	147	11	in	in	ADP
ispiv-39	147	12	terms	term	NOUN
ispiv-39	147	13	of	of	ADP
ispiv-39	147	14	ensemble	ensemble	ADJ
ispiv-39	147	15	-	-	PUNCT
ispiv-39	147	16	averaged	average	VERB
ispiv-39	147	17	flow	flow	NOUN
ispiv-39	147	18	velocity	velocity	NOUN
ispiv-39	147	19	and	and	CCONJ
ispiv-39	147	20	normalized	normalize	VERB
ispiv-39	147	21	in	in	ADP
ispiv-39	147	22	-	-	PUNCT
ispiv-39	147	23	plane	plane	NOUN
ispiv-39	147	24	turbulence	turbulence	NOUN
ispiv-39	147	25	kinetic	kinetic	ADJ
ispiv-39	147	26	energy	energy	NOUN
ispiv-39	147	27	(	(	PUNCT
ispiv-39	147	28	tke	tke	NOUN
ispiv-39	147	29	,	,	PUNCT
ispiv-39	147	30	(	(	PUNCT
ispiv-39	147	31	)	)	PUNCT
ispiv-39	147	32	'	'	NUM
ispiv-39	147	33	2	2	NUM
ispiv-39	147	34	'	'	NUM
ispiv-39	147	35	2	2	NUM
ispiv-39	147	36	20.5	20.5	NUM
ispiv-39	147	37	tipu	tipu	NOUN
ispiv-39	147	38	w	w	NOUN
ispiv-39	147	39	u+	u+	NOUN
ispiv-39	147	40	)	)	PUNCT
ispiv-39	147	41	for	for	ADP
ispiv-39	147	42	the	the	DET
ispiv-39	147	43	single	single	ADJ
ispiv-39	147	44	and	and	CCONJ
ispiv-39	147	45	twin	twin	ADJ
ispiv-39	147	46	-	-	PUNCT
ispiv-39	147	47	rotor	rotor	NOUN
ispiv-39	147	48	cases	case	NOUN
ispiv-39	147	49	,	,	PUNCT
ispiv-39	147	50	where	where	SCONJ
ispiv-39	147	51	the	the	DET
ispiv-39	147	52	rotor	rotor	NOUN
ispiv-39	147	53	tip	tip	NOUN
ispiv-39	147	54	speed	speed	NOUN
ispiv-39	147	55	(	(	PUNCT
ispiv-39	147	56	i.e.	i.e.	X
ispiv-39	147	57	,	,	PUNCT
ispiv-39	147	58	/	/	SYM
ispiv-39	147	59	2tipu	2tipu	NUM
ispiv-39	147	60	d=	d=	NUM
ispiv-39	147	61	)	)	PUNCT
ispiv-39	147	62	is	be	AUX
ispiv-39	147	63	61	61	NUM
ispiv-39	147	64	m	m	NOUN
ispiv-39	147	65	/	/	SYM
ispiv-39	147	66	s.	s.	PROPN
ispiv-39	147	67	as	as	SCONJ
ispiv-39	147	68	shown	show	VERB
ispiv-39	147	69	quantitatively	quantitatively	ADV
ispiv-39	147	70	in	in	ADP
ispiv-39	147	71	fig	fig	NOUN
ispiv-39	147	72	.	.	PUNCT
ispiv-39	148	1	6	6	NUM
ispiv-39	148	2	(	(	PUNCT
ispiv-39	148	3	a	a	NOUN
ispiv-39	148	4	)	)	PUNCT
ispiv-39	148	5	,	,	PUNCT
ispiv-39	148	6	the	the	DET
ispiv-39	148	7	twin	twin	ADJ
ispiv-39	148	8	-	-	PUNCT
ispiv-39	148	9	rotor	rotor	NOUN
ispiv-39	148	10	case	case	NOUN
ispiv-39	148	11	presents	present	VERB
ispiv-39	148	12	a	a	DET
ispiv-39	148	13	similar	similar	ADJ
ispiv-39	148	14	velocity	velocity	NOUN
ispiv-39	148	15	distribution	distribution	NOUN
ispiv-39	148	16	with	with	ADP
ispiv-39	148	17	that	that	PRON
ispiv-39	148	18	of	of	ADP
ispiv-39	148	19	the	the	DET
ispiv-39	148	20	single	single	ADJ
ispiv-39	148	21	rotor	rotor	NOUN
ispiv-39	148	22	case	case	NOUN
ispiv-39	148	23	.	.	PUNCT
ispiv-39	149	1	this	this	PRON
ispiv-39	149	2	explains	explain	VERB
ispiv-39	149	3	the	the	DET
ispiv-39	149	4	negligible	negligible	ADJ
ispiv-39	149	5	effect	effect	NOUN
ispiv-39	149	6	of	of	ADP
ispiv-39	149	7	separation	separation	NOUN
ispiv-39	149	8	distance	distance	NOUN
ispiv-39	149	9	on	on	ADP
ispiv-39	149	10	measured	measure	VERB
ispiv-39	149	11	mean	mean	NOUN
ispiv-39	149	12	thrusts	thrust	NOUN
ispiv-39	149	13	as	as	SCONJ
ispiv-39	149	14	indicated	indicate	VERB
ispiv-39	149	15	in	in	ADP
ispiv-39	149	16	fig	fig	NOUN
ispiv-39	149	17	.	.	PUNCT
ispiv-39	150	1	3(a	3(a	NUM
ispiv-39	150	2	)	)	PUNCT
ispiv-39	150	3	.	.	PUNCT
ispiv-39	151	1	interestingly	interestingly	ADV
ispiv-39	151	2	,	,	PUNCT
ispiv-39	151	3	as	as	SCONJ
ispiv-39	151	4	the	the	DET
ispiv-39	151	5	induced	induced	ADJ
ispiv-39	151	6	flow	flow	NOUN
ispiv-39	151	7	convected	convect	VERB
ispiv-39	151	8	downstream	downstream	NOUN
ispiv-39	151	9	,	,	PUNCT
ispiv-39	151	10	the	the	DET
ispiv-39	151	11	high	high	ADJ
ispiv-39	151	12	-	-	PUNCT
ispiv-39	151	13	velocity	velocity	NOUN
ispiv-39	151	14	region	region	NOUN
ispiv-39	151	15	was	be	AUX
ispiv-39	151	16	found	find	VERB
ispiv-39	151	17	to	to	PART
ispiv-39	151	18	converge	converge	VERB
ispiv-39	151	19	from	from	ADP
ispiv-39	151	20	around	around	ADP
ispiv-39	151	21	the	the	DET
ispiv-39	151	22	blade	blade	NOUN
ispiv-39	151	23	tip	tip	NOUN
ispiv-39	151	24	location	location	NOUN
ispiv-39	151	25	(	(	PUNCT
ispiv-39	151	26	i.e.	i.e.	X
ispiv-39	151	27	,	,	PUNCT
ispiv-39	151	28	~0.4d	~0.4d	NOUN
ispiv-39	151	29	)	)	PUNCT
ispiv-39	151	30	to	to	ADP
ispiv-39	151	31	near	near	ADP
ispiv-39	151	32	the	the	DET
ispiv-39	151	33	root	root	NOUN
ispiv-39	151	34	position	position	NOUN
ispiv-39	151	35	(	(	PUNCT
ispiv-39	151	36	i.e.	i.e.	X
ispiv-39	151	37	,	,	PUNCT
ispiv-39	151	38	~0.2d	~0.2d	NOUN
ispiv-39	151	39	)	)	PUNCT
ispiv-39	151	40	,	,	PUNCT
ispiv-39	151	41	leading	lead	VERB
ispiv-39	151	42	to	to	ADP
ispiv-39	151	43	the	the	DET
ispiv-39	151	44	significant	significant	ADJ
ispiv-39	151	45	radial	radial	ADJ
ispiv-39	151	46	contraction	contraction	NOUN
ispiv-39	151	47	behind	behind	ADP
ispiv-39	151	48	the	the	DET
ispiv-39	151	49	rotors	rotor	NOUN
ispiv-39	151	50	.	.	PUNCT
ispiv-39	152	1	though	though	SCONJ
ispiv-39	152	2	the	the	DET
ispiv-39	152	3	global	global	ADJ
ispiv-39	152	4	features	feature	NOUN
ispiv-39	152	5	of	of	ADP
ispiv-39	152	6	the	the	DET
ispiv-39	152	7	velocity	velocity	NOUN
ispiv-39	152	8	distribution	distribution	NOUN
ispiv-39	152	9	behind	behind	ADP
ispiv-39	152	10	the	the	DET
ispiv-39	152	11	rotors	rotor	NOUN
ispiv-39	152	12	were	be	AUX
ispiv-39	152	13	similar	similar	ADJ
ispiv-39	152	14	for	for	ADP
ispiv-39	152	15	both	both	DET
ispiv-39	152	16	cases	case	NOUN
ispiv-39	152	17	,	,	PUNCT
ispiv-39	152	18	some	some	DET
ispiv-39	152	19	differences	difference	NOUN
ispiv-39	152	20	can	can	AUX
ispiv-39	152	21	still	still	ADV
ispiv-39	152	22	be	be	AUX
ispiv-39	152	23	identified	identify	VERB
ispiv-39	152	24	from	from	ADP
ispiv-39	152	25	the	the	DET
ispiv-39	152	26	velocity	velocity	NOUN
ispiv-39	152	27	contours	contours	NOUN
ispiv-39	152	28	.	.	PUNCT
ispiv-39	153	1	compared	compare	VERB
ispiv-39	153	2	to	to	ADP
ispiv-39	153	3	the	the	DET
ispiv-39	153	4	single	single	ADJ
ispiv-39	153	5	rotor	rotor	NOUN
ispiv-39	153	6	case	case	NOUN
ispiv-39	153	7	,	,	PUNCT
ispiv-39	153	8	the	the	DET
ispiv-39	153	9	measured	measured	ADJ
ispiv-39	153	10	velocity	velocity	NOUN
ispiv-39	153	11	field	field	NOUN
ispiv-39	153	12	in	in	ADP
ispiv-39	153	13	the	the	DET
ispiv-39	153	14	twin	twin	ADJ
ispiv-39	153	15	-	-	PUNCT
ispiv-39	153	16	rotor	rotor	NOUN
ispiv-39	153	17	case	case	NOUN
ispiv-39	153	18	was	be	AUX
ispiv-39	153	19	slightly	slightly	ADV
ispiv-39	153	20	‘	'	PUNCT
ispiv-39	153	21	dragged	drag	VERB
ispiv-39	153	22	’	'	PUNCT
ispiv-39	153	23	toward	toward	ADP
ispiv-39	153	24	the	the	DET
ispiv-39	153	25	adjacent	adjacent	ADJ
ispiv-39	153	26	rotor	rotor	NOUN
ispiv-39	153	27	,	,	PUNCT
ispiv-39	153	28	which	which	PRON
ispiv-39	153	29	is	be	AUX
ispiv-39	153	30	believed	believe	VERB
ispiv-39	153	31	to	to	PART
ispiv-39	153	32	be	be	AUX
ispiv-39	153	33	caused	cause	VERB
ispiv-39	153	34	by	by	ADP
ispiv-39	153	35	the	the	DET
ispiv-39	153	36	coanda	coanda	NOUN
ispiv-39	153	37	effect	effect	NOUN
ispiv-39	153	38	(	(	PUNCT
ispiv-39	153	39	i.e.	i.e.	X
ispiv-39	153	40	,	,	PUNCT
ispiv-39	153	41	a	a	DET
ispiv-39	153	42	phenomenon	phenomenon	NOUN
ispiv-39	153	43	in	in	ADP
ispiv-39	153	44	which	which	PRON
ispiv-39	153	45	a	a	DET
ispiv-39	153	46	flow	flow	NOUN
ispiv-39	153	47	tends	tend	VERB
ispiv-39	153	48	to	to	PART
ispiv-39	153	49	attract	attract	VERB
ispiv-39	153	50	to	to	ADP
ispiv-39	153	51	a	a	DET
ispiv-39	153	52	nearby	nearby	ADJ
ispiv-39	153	53	object	object	NOUN
ispiv-39	153	54	)	)	PUNCT
ispiv-39	153	55	.	.	PUNCT
ispiv-39	154	1	as	as	ADP
ispiv-39	154	2	a	a	DET
ispiv-39	154	3	result	result	NOUN
ispiv-39	154	4	,	,	PUNCT
ispiv-39	154	5	the	the	DET
ispiv-39	154	6	w	w	PROPN
ispiv-39	154	7	velocity	velocity	NOUN
ispiv-39	154	8	component	component	NOUN
ispiv-39	154	9	behind	behind	ADP
ispiv-39	154	10	the	the	DET
ispiv-39	154	11	twin	twin	ADJ
ispiv-39	154	12	-	-	PUNCT
ispiv-39	154	13	rotor	rotor	NOUN
ispiv-39	154	14	was	be	AUX
ispiv-39	154	15	slightly	slightly	ADV
ispiv-39	154	16	lower	low	ADJ
ispiv-39	154	17	than	than	ADP
ispiv-39	154	18	that	that	PRON
ispiv-39	154	19	of	of	ADP
ispiv-39	154	20	the	the	DET
ispiv-39	154	21	single	single	ADJ
ispiv-39	154	22	rotor	rotor	NOUN
ispiv-39	154	23	in	in	ADP
ispiv-39	154	24	the	the	DET
ispiv-39	154	25	corresponding	correspond	VERB
ispiv-39	154	26	down	down	ADP
ispiv-39	154	27	-	-	PUNCT
ispiv-39	154	28	part	part	NOUN
ispiv-39	154	29	region	region	NOUN
ispiv-39	154	30	(	(	PUNCT
ispiv-39	154	31	-0.5	-0.5	X
ispiv-39	154	32	<	<	X
ispiv-39	154	33	x	x	X
ispiv-39	154	34	/	/	SYM
ispiv-39	154	35	d	d	X
ispiv-39	154	36	<	<	X
ispiv-39	154	37	-0.2	-0.2	NOUN
ispiv-39	154	38	)	)	PUNCT
ispiv-39	154	39	.	.	PUNCT
ispiv-39	155	1	fig	fig	NOUN
ispiv-39	155	2	.	.	PUNCT
ispiv-39	156	1	6	6	NUM
ispiv-39	156	2	(	(	PUNCT
ispiv-39	156	3	b	b	NOUN
ispiv-39	156	4	)	)	PUNCT
ispiv-39	156	5	shows	show	VERB
ispiv-39	156	6	the	the	DET
ispiv-39	156	7	comparisons	comparison	NOUN
ispiv-39	156	8	of	of	ADP
ispiv-39	156	9	the	the	DET
ispiv-39	156	10	normalized	normalize	VERB
ispiv-39	156	11	in	in	ADP
ispiv-39	156	12	-	-	PUNCT
ispiv-39	156	13	plane	plane	NOUN
ispiv-39	156	14	tke	tke	NOUN
ispiv-39	156	15	distributions	distribution	NOUN
ispiv-39	156	16	between	between	ADP
ispiv-39	156	17	the	the	DET
ispiv-39	156	18	single	single	ADJ
ispiv-39	156	19	and	and	CCONJ
ispiv-39	156	20	twin	twin	ADJ
ispiv-39	156	21	-	-	PUNCT
ispiv-39	156	22	rotor	rotor	NOUN
ispiv-39	156	23	cases	case	NOUN
ispiv-39	156	24	.	.	PUNCT
ispiv-39	157	1	clearly	clearly	ADV
ispiv-39	157	2	,	,	PUNCT
ispiv-39	157	3	for	for	ADP
ispiv-39	157	4	the	the	DET
ispiv-39	157	5	single	single	ADJ
ispiv-39	157	6	rotor	rotor	NOUN
ispiv-39	157	7	case	case	NOUN
ispiv-39	157	8	,	,	PUNCT
ispiv-39	157	9	regions	region	NOUN
ispiv-39	157	10	near	near	ADP
ispiv-39	157	11	the	the	DET
ispiv-39	157	12	rotor	rotor	NOUN
ispiv-39	157	13	tips	tip	NOUN
ispiv-39	157	14	were	be	AUX
ispiv-39	157	15	characterized	characterize	VERB
ispiv-39	157	16	with	with	ADP
ispiv-39	157	17	elevated	elevate	VERB
ispiv-39	157	18	in	in	ADP
ispiv-39	157	19	-	-	PUNCT
ispiv-39	157	20	plain	plain	NOUN
ispiv-39	157	21	tke	tke	NOUN
ispiv-39	157	22	,	,	PUNCT
ispiv-39	157	23	which	which	PRON
ispiv-39	157	24	was	be	AUX
ispiv-39	157	25	caused	cause	VERB
ispiv-39	157	26	by	by	ADP
ispiv-39	157	27	the	the	DET
ispiv-39	157	28	periodic	periodic	ADJ
ispiv-39	157	29	vortex	vortex	NOUN
ispiv-39	157	30	shedding	shed	VERB
ispiv-39	157	31	from	from	ADP
ispiv-39	157	32	the	the	DET
ispiv-39	157	33	blade	blade	NOUN
ispiv-39	157	34	tip	tip	NOUN
ispiv-39	157	35	.	.	PUNCT
ispiv-39	158	1	a	a	DET
ispiv-39	158	2	similar	similar	ADJ
ispiv-39	158	3	phenomenon	phenomenon	NOUN
ispiv-39	158	4	can	can	AUX
ispiv-39	158	5	be	be	AUX
ispiv-39	158	6	observed	observe	VERB
ispiv-39	158	7	for	for	ADP
ispiv-39	158	8	the	the	DET
ispiv-39	158	9	twin	twin	ADJ
ispiv-39	158	10	-	-	PUNCT
ispiv-39	158	11	rotor	rotor	NOUN
ispiv-39	158	12	case	case	NOUN
ispiv-39	158	13	,	,	PUNCT
ispiv-39	158	14	except	except	SCONJ
ispiv-39	158	15	the	the	DET
ispiv-39	158	16	region	region	NOUN
ispiv-39	158	17	with	with	ADP
ispiv-39	158	18	enhanced	enhanced	ADJ
ispiv-39	158	19	in	in	ADP
ispiv-39	158	20	-	-	PUNCT
ispiv-39	158	21	plain	plain	NOUN
ispiv-39	158	22	tke	tke	NOUN
ispiv-39	158	23	was	be	AUX
ispiv-39	158	24	found	find	VERB
ispiv-39	158	25	to	to	PART
ispiv-39	158	26	be	be	AUX
ispiv-39	158	27	approximately	approximately	ADV
ispiv-39	158	28	doubled	double	VERB
ispiv-39	158	29	in	in	ADP
ispiv-39	158	30	the	the	DET
ispiv-39	158	31	lateral	lateral	ADJ
ispiv-39	158	32	direction	direction	NOUN
ispiv-39	158	33	,	,	PUNCT
ispiv-39	158	34	but	but	CCONJ
ispiv-39	158	35	reduced	reduce	VERB
ispiv-39	158	36	by	by	ADP
ispiv-39	158	37	half	half	NOUN
ispiv-39	158	38	in	in	ADP
ispiv-39	158	39	the	the	DET
ispiv-39	158	40	streamwise	streamwise	NOUN
ispiv-39	158	41	direction	direction	NOUN
ispiv-39	158	42	compared	compare	VERB
ispiv-39	158	43	to	to	ADP
ispiv-39	158	44	the	the	DET
ispiv-39	158	45	single	single	ADJ
ispiv-39	158	46	rotor	rotor	NOUN
ispiv-39	158	47	.	.	PUNCT
ispiv-39	159	1	since	since	SCONJ
ispiv-39	159	2	the	the	DET
ispiv-39	159	3	two	two	NUM
ispiv-39	159	4	rotors	rotor	NOUN
ispiv-39	159	5	were	be	AUX
ispiv-39	159	6	only	only	ADV
ispiv-39	159	7	0.05d	0.05d	NUM
ispiv-39	159	8	apart	apart	ADV
ispiv-39	159	9	,	,	PUNCT
ispiv-39	159	10	the	the	DET
ispiv-39	159	11	tip	tip	NOUN
ispiv-39	159	12	vortexes	vortexe	VERB
ispiv-39	159	13	from	from	ADP
ispiv-39	159	14	rotors	rotor	NOUN
ispiv-39	159	15	would	would	AUX
ispiv-39	159	16	interact	interact	VERB
ispiv-39	159	17	severely	severely	ADV
ispiv-39	159	18	with	with	ADP
ispiv-39	159	19	the	the	DET
ispiv-39	159	20	nearby	nearby	ADJ
ispiv-39	159	21	vortices	vortex	NOUN
ispiv-39	159	22	,	,	PUNCT
ispiv-39	159	23	rendering	render	VERB
ispiv-39	159	24	enhanced	enhance	VERB
ispiv-39	159	25	in	in	ADP
ispiv-39	159	26	-	-	PUNCT
ispiv-39	159	27	plane	plane	NOUN
ispiv-39	159	28	tke	tke	NOUN
ispiv-39	159	29	distributions	distribution	NOUN
ispiv-39	159	30	in	in	ADP
ispiv-39	159	31	contrast	contrast	NOUN
ispiv-39	159	32	to	to	ADP
ispiv-39	159	33	the	the	DET
ispiv-39	159	34	single	single	ADJ
ispiv-39	159	35	rotor	rotor	NOUN
ispiv-39	159	36	case	case	NOUN
ispiv-39	159	37	in	in	ADP
ispiv-39	159	38	the	the	DET
ispiv-39	159	39	near	near	ADJ
ispiv-39	159	40	rotor	rotor	NOUN
ispiv-39	159	41	region	region	NOUN
ispiv-39	159	42	.	.	PUNCT
ispiv-39	160	1	however	however	ADV
ispiv-39	160	2	,	,	PUNCT
ispiv-39	160	3	because	because	SCONJ
ispiv-39	160	4	of	of	ADP
ispiv-39	160	5	the	the	DET
ispiv-39	160	6	intensive	intensive	ADJ
ispiv-39	160	7	interaction	interaction	NOUN
ispiv-39	160	8	within	within	ADP
ispiv-39	160	9	rotors	rotor	NOUN
ispiv-39	160	10	,	,	PUNCT
ispiv-39	160	11	the	the	DET
ispiv-39	160	12	associated	associated	ADJ
ispiv-39	160	13	coherent	coherent	ADJ
ispiv-39	160	14	structures	structure	NOUN
ispiv-39	160	15	behind	behind	ADP
ispiv-39	160	16	the	the	DET
ispiv-39	160	17	twin	twin	ADJ
ispiv-39	160	18	-	-	PUNCT
ispiv-39	160	19	rotor	rotor	NOUN
ispiv-39	160	20	would	would	AUX
ispiv-39	160	21	also	also	ADV
ispiv-39	160	22	dissipate	dissipate	VERB
ispiv-39	160	23	much	much	ADV
ispiv-39	160	24	faster	fast	ADV
ispiv-39	160	25	than	than	ADP
ispiv-39	160	26	that	that	PRON
ispiv-39	160	27	of	of	ADP
ispiv-39	160	28	the	the	DET
ispiv-39	160	29	single	single	ADJ
ispiv-39	160	30	rotor	rotor	NOUN
ispiv-39	160	31	,	,	PUNCT
ispiv-39	160	32	therefore	therefore	ADV
ispiv-39	160	33	the	the	DET
ispiv-39	160	34	region	region	NOUN
ispiv-39	160	35	with	with	ADP
ispiv-39	160	36	the	the	DET
ispiv-39	160	37	augmented	augment	VERB
ispiv-39	160	38	in	in	ADP
ispiv-39	160	39	-	-	PUNCT
ispiv-39	160	40	plain	plain	NOUN
ispiv-39	160	41	tke	tke	NOUN
ispiv-39	160	42	level	level	NOUN
ispiv-39	160	43	would	would	AUX
ispiv-39	160	44	reduce	reduce	VERB
ispiv-39	160	45	rapidly	rapidly	ADV
ispiv-39	160	46	as	as	SCONJ
ispiv-39	160	47	flow	flow	NOUN
ispiv-39	160	48	convected	convect	VERB
ispiv-39	160	49	downstream	downstream	NOUN
ispiv-39	160	50	.	.	PUNCT
ispiv-39	161	1	the	the	DET
ispiv-39	161	2	elevated	elevated	ADJ
ispiv-39	161	3	tke	tke	NOUN
ispiv-39	161	4	level	level	NOUN
ispiv-39	161	5	is	be	AUX
ispiv-39	161	6	believed	believe	VERB
ispiv-39	161	7	to	to	PART
ispiv-39	161	8	be	be	AUX
ispiv-39	161	9	not	not	PART
ispiv-39	161	10	only	only	ADV
ispiv-39	161	11	related	relate	VERB
ispiv-39	161	12	to	to	ADP
ispiv-39	161	13	the	the	DET
ispiv-39	161	14	significant	significant	ADJ
ispiv-39	161	15	enhancement	enhancement	NOUN
ispiv-39	161	16	of	of	ADP
ispiv-39	161	17	thrust	thrust	ADJ
ispiv-39	161	18	fluctuations	fluctuation	NOUN
ispiv-39	161	19	discussed	discuss	VERB
ispiv-39	161	20	in	in	ADP
ispiv-39	161	21	the	the	DET
ispiv-39	161	22	twin	twin	ADJ
ispiv-39	161	23	-	-	PUNCT
ispiv-39	161	24	rotor	rotor	NOUN
ispiv-39	161	25	case	case	NOUN
ispiv-39	161	26	(	(	PUNCT
ispiv-39	161	27	i.e.	i.e.	X
ispiv-39	161	28	,	,	PUNCT
ispiv-39	161	29	shown	show	VERB
ispiv-39	161	30	in	in	ADP
ispiv-39	161	31	fig	fig	NOUN
ispiv-39	161	32	.	.	PUNCT
ispiv-39	162	1	3	3	NUM
ispiv-39	162	2	)	)	PUNCT
ispiv-39	162	3	,	,	PUNCT
ispiv-39	162	4	but	but	CCONJ
ispiv-39	162	5	also	also	ADV
ispiv-39	162	6	leaded	lead	VERB
ispiv-39	162	7	to	to	ADP
ispiv-39	162	8	the	the	DET
ispiv-39	162	9	augmentation	augmentation	NOUN
ispiv-39	162	10	of	of	ADP
ispiv-39	162	11	broadband	broadband	NOUN
ispiv-39	162	12	noise	noise	NOUN
ispiv-39	162	13	(	(	PUNCT
ispiv-39	162	14	i.e.	i.e.	X
ispiv-39	162	15	,	,	PUNCT
ispiv-39	162	16	shown	show	VERB
ispiv-39	162	17	in	in	ADP
ispiv-39	162	18	fig	fig	NOUN
ispiv-39	162	19	.	.	PUNCT
ispiv-39	163	1	5	5	NUM
ispiv-39	163	2	)	)	PUNCT
ispiv-39	163	3	,	,	PUNCT
ispiv-39	163	4	which	which	PRON
ispiv-39	163	5	will	will	AUX
ispiv-39	163	6	discuss	discuss	VERB
ispiv-39	163	7	further	far	ADV
ispiv-39	163	8	in	in	ADP
ispiv-39	163	9	the	the	DET
ispiv-39	163	10	following	follow	VERB
ispiv-39	163	11	stereoscopic	stereoscopic	ADJ
ispiv-39	163	12	piv	piv	NOUN
ispiv-39	163	13	results	result	NOUN
ispiv-39	163	14	.	.	PUNCT
ispiv-39	164	1	(	(	PUNCT
ispiv-39	164	2	a	a	X
ispiv-39	164	3	)	)	PUNCT
ispiv-39	164	4	ensemble	ensemble	ADJ
ispiv-39	164	5	-	-	PUNCT
ispiv-39	164	6	averaged	average	VERB
ispiv-39	164	7	velocity	velocity	NOUN
ispiv-39	164	8	field	field	NOUN
ispiv-39	164	9	(	(	PUNCT
ispiv-39	164	10	b	b	NOUN
ispiv-39	164	11	)	)	PUNCT
ispiv-39	164	12	normalized	normalize	VERB
ispiv-39	164	13	in	in	ADP
ispiv-39	164	14	-	-	PUNCT
ispiv-39	164	15	plane	plane	NOUN
ispiv-39	164	16	tke	tke	NOUN
ispiv-39	164	17	distribution	distribution	NOUN
ispiv-39	164	18	figure	figure	NOUN
ispiv-39	164	19	6	6	NUM
ispiv-39	164	20	.	.	PUNCT
ispiv-39	164	21	measured	measure	VERB
ispiv-39	164	22	piv	piv	NOUN
ispiv-39	164	23	results	result	NOUN
ispiv-39	164	24	for	for	ADP
ispiv-39	164	25	the	the	DET
ispiv-39	164	26	single	single	ADJ
ispiv-39	164	27	rotor	rotor	NOUN
ispiv-39	164	28	(	(	PUNCT
ispiv-39	164	29	left	leave	VERB
ispiv-39	164	30	)	)	PUNCT
ispiv-39	164	31	and	and	CCONJ
ispiv-39	164	32	twin	twin	ADJ
ispiv-39	164	33	-	-	PUNCT
ispiv-39	164	34	rotor	rotor	NOUN
ispiv-39	164	35	(	(	PUNCT
ispiv-39	164	36	right	right	ADJ
ispiv-39	164	37	,	,	PUNCT
ispiv-39	164	38	l=0.05d	l=0.05d	ADJ
ispiv-39	164	39	)	)	PUNCT
ispiv-39	164	40	cases	case	NOUN
ispiv-39	164	41	:	:	PUNCT
ispiv-39	164	42	(	(	PUNCT
ispiv-39	164	43	a	a	X
ispiv-39	164	44	)	)	PUNCT
ispiv-39	164	45	ensemble	ensemble	ADJ
ispiv-39	164	46	-	-	PUNCT
ispiv-39	164	47	averaged	average	VERB
ispiv-39	164	48	velocity	velocity	NOUN
ispiv-39	164	49	field	field	NOUN
ispiv-39	164	50	,	,	PUNCT
ispiv-39	164	51	(	(	PUNCT
ispiv-39	164	52	b	b	NOUN
ispiv-39	164	53	)	)	PUNCT
ispiv-39	164	54	normalized	normalize	VERB
ispiv-39	164	55	in	in	ADP
ispiv-39	164	56	-	-	PUNCT
ispiv-39	164	57	plane	plane	NOUN
ispiv-39	164	58	tke	tke	NOUN
ispiv-39	164	59	distribution	distribution	NOUN
ispiv-39	164	60	.	.	PUNCT
ispiv-39	165	1	d.	d.	PROPN
ispiv-39	165	2	phase	phase	NOUN
ispiv-39	165	3	-	-	PUNCT
ispiv-39	165	4	locked	lock	VERB
ispiv-39	165	5	piv	piv	NOUN
ispiv-39	165	6	measurement	measurement	NOUN
ispiv-39	165	7	results	result	VERB
ispiv-39	165	8	in	in	ADP
ispiv-39	165	9	the	the	DET
ispiv-39	165	10	present	present	ADJ
ispiv-39	165	11	study	study	NOUN
ispiv-39	165	12	,	,	PUNCT
ispiv-39	165	13	phase	phase	NOUN
ispiv-39	165	14	-	-	PUNCT
ispiv-39	165	15	locked	lock	VERB
ispiv-39	165	16	piv	piv	NOUN
ispiv-39	165	17	measurements	measurement	NOUN
ispiv-39	165	18	were	be	AUX
ispiv-39	165	19	also	also	ADV
ispiv-39	165	20	employed	employ	VERB
ispiv-39	165	21	to	to	PART
ispiv-39	165	22	produce	produce	VERB
ispiv-39	165	23	“	"	PUNCT
ispiv-39	165	24	frozen	frozen	ADJ
ispiv-39	165	25	”	"	PUNCT
ispiv-39	165	26	images	image	NOUN
ispiv-39	165	27	of	of	ADP
ispiv-39	165	28	the	the	DET
ispiv-39	165	29	unsteady	unsteady	ADJ
ispiv-39	165	30	vortex	vortex	NOUN
ispiv-39	165	31	structures	structure	NOUN
ispiv-39	165	32	behind	behind	ADP
ispiv-39	165	33	the	the	DET
ispiv-39	165	34	rotor	rotor	NOUN
ispiv-39	165	35	at	at	ADP
ispiv-39	165	36	different	different	ADJ
ispiv-39	165	37	phase	phase	NOUN
ispiv-39	165	38	angles	angle	NOUN
ispiv-39	165	39	.	.	PUNCT
ispiv-39	166	1	note	note	VERB
ispiv-39	166	2	that	that	SCONJ
ispiv-39	166	3	only	only	ADV
ispiv-39	166	4	the	the	DET
ispiv-39	166	5	phase	phase	NOUN
ispiv-39	166	6	of	of	ADP
ispiv-39	166	7	left	left	ADJ
ispiv-39	166	8	-	-	PUNCT
ispiv-39	166	9	hand	hand	NOUN
ispiv-39	166	10	rotor	rotor	NOUN
ispiv-39	166	11	(	(	PUNCT
ispiv-39	166	12	i.e.	i.e.	X
ispiv-39	166	13	,	,	PUNCT
ispiv-39	166	14	shown	show	VERB
ispiv-39	166	15	in	in	ADP
ispiv-39	166	16	fig	fig	NOUN
ispiv-39	166	17	.	.	PUNCT
ispiv-39	167	1	2(a	2(a	NUM
ispiv-39	167	2	)	)	PUNCT
ispiv-39	167	3	)	)	PUNCT
ispiv-39	168	1	in	in	ADP
ispiv-39	168	2	the	the	DET
ispiv-39	168	3	twin	twin	ADJ
ispiv-39	168	4	-	-	PUNCT
ispiv-39	168	5	rotor	rotor	NOUN
ispiv-39	168	6	system	system	NOUN
ispiv-39	168	7	was	be	AUX
ispiv-39	168	8	monitored	monitor	VERB
ispiv-39	168	9	during	during	ADP
ispiv-39	168	10	the	the	DET
ispiv-39	168	11	phase	phase	NOUN
ispiv-39	168	12	-	-	PUNCT
ispiv-39	168	13	locked	lock	VERB
ispiv-39	168	14	piv	piv	NOUN
ispiv-39	168	15	test	test	NOUN
ispiv-39	168	16	,	,	PUNCT
ispiv-39	168	17	whereas	whereas	SCONJ
ispiv-39	168	18	the	the	DET
ispiv-39	168	19	other	other	ADJ
ispiv-39	168	20	rotor	rotor	NOUN
ispiv-39	168	21	can	can	AUX
ispiv-39	168	22	be	be	AUX
ispiv-39	168	23	treated	treat	VERB
ispiv-39	168	24	as	as	ADP
ispiv-39	168	25	a	a	DET
ispiv-39	168	26	free	free	ADJ
ispiv-39	168	27	-	-	PUNCT
ispiv-39	168	28	run	run	NOUN
ispiv-39	168	29	condition	condition	NOUN
ispiv-39	168	30	.	.	PUNCT
ispiv-39	169	1	figure	figure	NOUN
ispiv-39	169	2	7	7	NUM
ispiv-39	169	3	shows	show	VERB
ispiv-39	169	4	the	the	DET
ispiv-39	169	5	comparison	comparison	NOUN
ispiv-39	169	6	of	of	ADP
ispiv-39	169	7	phase	phase	NOUN
ispiv-39	169	8	-	-	PUNCT
ispiv-39	169	9	averaged	average	VERB
ispiv-39	169	10	velocity	velocity	NOUN
ispiv-39	169	11	distributions	distribution	NOUN
ispiv-39	169	12	between	between	ADP
ispiv-39	169	13	the	the	DET
ispiv-39	169	14	single	single	ADJ
ispiv-39	169	15	and	and	CCONJ
ispiv-39	169	16	twin	twin	ADJ
ispiv-39	169	17	-	-	PUNCT
ispiv-39	169	18	rotor	rotor	NOUN
ispiv-39	169	19	cases	case	NOUN
ispiv-39	169	20	at	at	ADP
ispiv-39	169	21	two	two	NUM
ispiv-39	169	22	different	different	ADJ
ispiv-39	169	23	phase	phase	NOUN
ispiv-39	169	24	angles	angle	VERB
ispiv-39	169	25	(	(	PUNCT
ispiv-39	169	26	i.e.	i.e.	X
ispiv-39	169	27	,	,	PUNCT
ispiv-39	169	28	θ	θ	PROPN
ispiv-39	169	29	=	=	SYM
ispiv-39	169	30	0º	0º	PROPN
ispiv-39	169	31	,	,	PUNCT
ispiv-39	169	32	120º	120º	PROPN
ispiv-39	169	33	)	)	PUNCT
ispiv-39	169	34	.	.	PUNCT
ispiv-39	170	1	during	during	ADP
ispiv-39	170	2	the	the	DET
ispiv-39	170	3	experiment	experiment	NOUN
ispiv-39	170	4	,	,	PUNCT
ispiv-39	170	5	the	the	DET
ispiv-39	170	6	phase	phase	NOUN
ispiv-39	170	7	angle	angle	NOUN
ispiv-39	170	8	is	be	AUX
ispiv-39	170	9	defined	define	VERB
ispiv-39	170	10	as	as	ADP
ispiv-39	170	11	the	the	DET
ispiv-39	170	12	angle	angle	NOUN
ispiv-39	170	13	between	between	ADP
ispiv-39	170	14	the	the	DET
ispiv-39	170	15	vertical	vertical	ADJ
ispiv-39	170	16	y	y	PROPN
ispiv-39	170	17	-	-	PROPN
ispiv-39	170	18	z	z	PROPN
ispiv-39	170	19	plane	plane	NOUN
ispiv-39	170	20	and	and	CCONJ
ispiv-39	170	21	the	the	DET
ispiv-39	170	22	position	position	NOUN
ispiv-39	170	23	of	of	ADP
ispiv-39	170	24	a	a	DET
ispiv-39	170	25	pre	pre	ADJ
ispiv-39	170	26	-	-	ADJ
ispiv-39	170	27	marked	mark	VERB
ispiv-39	170	28	rotor	rotor	NOUN
ispiv-39	170	29	blade	blade	NOUN
ispiv-39	170	30	.	.	PUNCT
ispiv-39	171	1	the	the	DET
ispiv-39	171	2	pre	pre	ADJ
ispiv-39	171	3	-	-	ADJ
ispiv-39	171	4	marked	marked	ADJ
ispiv-39	171	5	blade	blade	NOUN
ispiv-39	171	6	was	be	AUX
ispiv-39	171	7	in	in	ADP
ispiv-39	171	8	the	the	DET
ispiv-39	171	9	most	most	ADV
ispiv-39	171	10	upward	upward	ADJ
ispiv-39	171	11	position	position	NOUN
ispiv-39	171	12	(	(	PUNCT
ispiv-39	171	13	i.e.	i.e.	X
ispiv-39	171	14	,	,	PUNCT
ispiv-39	171	15	within	within	ADP
ispiv-39	171	16	the	the	DET
ispiv-39	171	17	vertical	vertical	ADJ
ispiv-39	171	18	y	y	PROPN
ispiv-39	171	19	-	-	PROPN
ispiv-39	171	20	z	z	PROPN
ispiv-39	171	21	plane	plane	NOUN
ispiv-39	171	22	)	)	PUNCT
ispiv-39	171	23	for	for	ADP
ispiv-39	171	24	the	the	DET
ispiv-39	171	25	phase	phase	NOUN
ispiv-39	171	26	angle	angle	NOUN
ispiv-39	171	27	of	of	ADP
ispiv-39	171	28	θ	θ	PROPN
ispiv-39	171	29	=	=	SYM
ispiv-39	171	30	0º.	0º.	PROPN
ispiv-39	171	31	as	as	SCONJ
ispiv-39	171	32	shown	show	VERB
ispiv-39	171	33	clearly	clearly	ADV
ispiv-39	171	34	in	in	ADP
ispiv-39	171	35	fig	fig	NOUN
ispiv-39	171	36	.	.	PUNCT
ispiv-39	172	1	7	7	NUM
ispiv-39	172	2	,	,	PUNCT
ispiv-39	172	3	the	the	DET
ispiv-39	172	4	existence	existence	NOUN
ispiv-39	172	5	of	of	ADP
ispiv-39	172	6	wave	wave	NOUN
ispiv-39	172	7	-	-	PUNCT
ispiv-39	172	8	shaped	shape	VERB
ispiv-39	172	9	flow	flow	NOUN
ispiv-39	172	10	structures	structure	NOUN
ispiv-39	172	11	can	can	AUX
ispiv-39	172	12	be	be	AUX
ispiv-39	172	13	observed	observe	VERB
ispiv-39	172	14	clearly	clearly	ADV
ispiv-39	172	15	at	at	ADP
ispiv-39	172	16	the	the	DET
ispiv-39	172	17	tip	tip	NOUN
ispiv-39	172	18	height	height	NOUN
ispiv-39	172	19	for	for	ADP
ispiv-39	172	20	the	the	DET
ispiv-39	172	21	single	single	ADJ
ispiv-39	172	22	rotor	rotor	NOUN
ispiv-39	172	23	case	case	NOUN
ispiv-39	172	24	,	,	PUNCT
ispiv-39	172	25	which	which	PRON
ispiv-39	172	26	is	be	AUX
ispiv-39	172	27	closely	closely	ADV
ispiv-39	172	28	related	relate	VERB
ispiv-39	172	29	to	to	ADP
ispiv-39	172	30	the	the	DET
ispiv-39	172	31	periodical	periodical	ADJ
ispiv-39	172	32	shedding	shedding	NOUN
ispiv-39	172	33	of	of	ADP
ispiv-39	172	34	tip	tip	NOUN
ispiv-39	172	35	vortices	vortex	NOUN
ispiv-39	172	36	behind	behind	ADP
ispiv-39	172	37	the	the	DET
ispiv-39	172	38	rotor	rotor	NOUN
ispiv-39	172	39	.	.	PUNCT
ispiv-39	173	1	the	the	DET
ispiv-39	173	2	wave	wave	NOUN
ispiv-39	173	3	-	-	PUNCT
ispiv-39	173	4	shaped	shape	VERB
ispiv-39	173	5	structures	structure	NOUN
ispiv-39	173	6	would	would	AUX
ispiv-39	173	7	propagate	propagate	VERB
ispiv-39	173	8	downstream	downstream	ADV
ispiv-39	173	9	as	as	SCONJ
ispiv-39	173	10	the	the	DET
ispiv-39	173	11	phase	phase	NOUN
ispiv-39	173	12	angle	angle	NOUN
ispiv-39	173	13	increased	increase	VERB
ispiv-39	173	14	.	.	PUNCT
ispiv-39	174	1	however	however	ADV
ispiv-39	174	2	,	,	PUNCT
ispiv-39	174	3	due	due	ADP
ispiv-39	174	4	to	to	ADP
ispiv-39	174	5	the	the	DET
ispiv-39	174	6	rotor	rotor	NOUN
ispiv-39	174	7	interactions	interaction	NOUN
ispiv-39	174	8	for	for	ADP
ispiv-39	174	9	the	the	DET
ispiv-39	174	10	twin	twin	ADJ
ispiv-39	174	11	-	-	PUNCT
ispiv-39	174	12	rotor	rotor	NOUN
ispiv-39	174	13	case	case	NOUN
ispiv-39	174	14	,	,	PUNCT
ispiv-39	174	15	the	the	DET
ispiv-39	174	16	wave	wave	NOUN
ispiv-39	174	17	-	-	PUNCT
ispiv-39	174	18	shaped	shape	VERB
ispiv-39	174	19	structures	structure	NOUN
ispiv-39	174	20	were	be	AUX
ispiv-39	174	21	found	find	VERB
ispiv-39	174	22	to	to	PART
ispiv-39	174	23	dissipate	dissipate	VERB
ispiv-39	174	24	much	much	ADV
ispiv-39	174	25	faster	fast	ADV
ispiv-39	174	26	and	and	CCONJ
ispiv-39	174	27	become	become	VERB
ispiv-39	174	28	less	less	ADV
ispiv-39	174	29	pronounced	pronounced	ADJ
ispiv-39	174	30	in	in	ADP
ispiv-39	174	31	comparison	comparison	NOUN
ispiv-39	174	32	with	with	ADP
ispiv-39	174	33	that	that	PRON
ispiv-39	174	34	of	of	ADP
ispiv-39	174	35	the	the	DET
ispiv-39	174	36	single	single	ADJ
ispiv-39	174	37	rotor	rotor	NOUN
ispiv-39	174	38	case	case	NOUN
ispiv-39	174	39	.	.	PUNCT
ispiv-39	175	1	in	in	ADP
ispiv-39	175	2	addition	addition	NOUN
ispiv-39	175	3	,	,	PUNCT
ispiv-39	175	4	these	these	DET
ispiv-39	175	5	flow	flow	NOUN
ispiv-39	175	6	structures	structure	NOUN
ispiv-39	175	7	behind	behind	ADP
ispiv-39	175	8	rotors	rotor	NOUN
ispiv-39	175	9	were	be	AUX
ispiv-39	175	10	found	find	VERB
ispiv-39	175	11	to	to	PART
ispiv-39	175	12	shift	shift	VERB
ispiv-39	175	13	radially	radially	ADV
ispiv-39	175	14	downward	downward	ADV
ispiv-39	175	15	to	to	ADP
ispiv-39	175	16	the	the	DET
ispiv-39	175	17	adjacent	adjacent	ADJ
ispiv-39	175	18	rotor	rotor	NOUN
ispiv-39	175	19	,	,	PUNCT
ispiv-39	175	20	which	which	PRON
ispiv-39	175	21	is	be	AUX
ispiv-39	175	22	consistent	consistent	ADJ
ispiv-39	175	23	with	with	ADP
ispiv-39	175	24	the	the	DET
ispiv-39	175	25	measured	measure	VERB
ispiv-39	175	26	results	result	NOUN
ispiv-39	175	27	shown	show	VERB
ispiv-39	175	28	in	in	ADP
ispiv-39	175	29	fig	fig	NOUN
ispiv-39	175	30	.	.	PUNCT
ispiv-39	176	1	6	6	NUM
ispiv-39	176	2	.	.	X
ispiv-39	176	3	(	(	PUNCT
ispiv-39	176	4	a	a	NOUN
ispiv-39	176	5	)	)	PUNCT
ispiv-39	176	6	.	.	PUNCT
ispiv-39	177	1	phase	phase	NOUN
ispiv-39	177	2	angle	angle	NOUN
ispiv-39	177	3	θ	θ	NOUN
ispiv-39	177	4	=	=	SYM
ispiv-39	177	5	0º	0º	PROPN
ispiv-39	177	6	(	(	PUNCT
ispiv-39	177	7	a	a	NOUN
ispiv-39	177	8	)	)	PUNCT
ispiv-39	177	9	.	.	PUNCT
ispiv-39	178	1	phase	phase	NOUN
ispiv-39	178	2	angle	angle	NOUN
ispiv-39	178	3	θ	θ	NOUN
ispiv-39	178	4	=	=	SYM
ispiv-39	178	5	0º	0º	NOUN
ispiv-39	178	6	figure	figure	NOUN
ispiv-39	178	7	7	7	NUM
ispiv-39	178	8	.	.	NOUN
ispiv-39	178	9	phase	phase	NOUN
ispiv-39	178	10	-	-	PUNCT
ispiv-39	178	11	locked	lock	VERB
ispiv-39	178	12	flow	flow	NOUN
ispiv-39	178	13	velocity	velocity	NOUN
ispiv-39	178	14	distributions	distribution	NOUN
ispiv-39	178	15	for	for	ADP
ispiv-39	178	16	the	the	DET
ispiv-39	178	17	single	single	ADJ
ispiv-39	178	18	rotor	rotor	NOUN
ispiv-39	178	19	(	(	PUNCT
ispiv-39	178	20	left	leave	VERB
ispiv-39	178	21	)	)	PUNCT
ispiv-39	178	22	and	and	CCONJ
ispiv-39	178	23	twin	twin	ADJ
ispiv-39	178	24	-	-	PUNCT
ispiv-39	178	25	rotor	rotor	NOUN
ispiv-39	178	26	(	(	PUNCT
ispiv-39	178	27	right	right	ADJ
ispiv-39	178	28	,	,	PUNCT
ispiv-39	178	29	l=0.05d	l=0.05d	ADJ
ispiv-39	178	30	)	)	PUNCT
ispiv-39	178	31	configurations	configuration	NOUN
ispiv-39	178	32	figure	figure	VERB
ispiv-39	178	33	8	8	NUM
ispiv-39	178	34	shows	show	VERB
ispiv-39	178	35	the	the	DET
ispiv-39	178	36	comparison	comparison	NOUN
ispiv-39	178	37	of	of	ADP
ispiv-39	178	38	the	the	DET
ispiv-39	178	39	phase	phase	NOUN
ispiv-39	178	40	-	-	PUNCT
ispiv-39	178	41	locked	lock	VERB
ispiv-39	178	42	vorticity	vorticity	NOUN
ispiv-39	178	43	distributions	distribution	NOUN
ispiv-39	178	44	between	between	ADP
ispiv-39	178	45	the	the	DET
ispiv-39	178	46	single	single	ADJ
ispiv-39	178	47	rotor	rotor	NOUN
ispiv-39	178	48	and	and	CCONJ
ispiv-39	178	49	twin	twin	ADJ
ispiv-39	178	50	-	-	PUNCT
ispiv-39	178	51	rotor	rotor	NOUN
ispiv-39	178	52	cases	case	NOUN
ispiv-39	178	53	,	,	PUNCT
ispiv-39	178	54	which	which	PRON
ispiv-39	178	55	can	can	AUX
ispiv-39	178	56	be	be	AUX
ispiv-39	178	57	used	use	VERB
ispiv-39	178	58	to	to	PART
ispiv-39	178	59	reveal	reveal	VERB
ispiv-39	178	60	the	the	DET
ispiv-39	178	61	effect	effect	NOUN
ispiv-39	178	62	of	of	ADP
ispiv-39	178	63	rotor	rotor	NOUN
ispiv-39	178	64	interactions	interaction	NOUN
ispiv-39	178	65	on	on	ADP
ispiv-39	178	66	the	the	DET
ispiv-39	178	67	unsteady	unsteady	ADJ
ispiv-39	178	68	vortices	vortex	NOUN
ispiv-39	178	69	more	more	ADV
ispiv-39	178	70	clearly	clearly	ADV
ispiv-39	178	71	.	.	PUNCT
ispiv-39	179	1	here	here	ADV
ispiv-39	179	2	,	,	PUNCT
ispiv-39	179	3	the	the	DET
ispiv-39	179	4	separation	separation	NOUN
ispiv-39	179	5	distance	distance	NOUN
ispiv-39	179	6	is	be	AUX
ispiv-39	179	7	0.05d	0.05d	PROPN
ispiv-39	179	8	.	.	PUNCT
ispiv-39	180	1	as	as	SCONJ
ispiv-39	180	2	expected	expect	VERB
ispiv-39	180	3	,	,	PUNCT
ispiv-39	180	4	the	the	DET
ispiv-39	180	5	general	general	ADJ
ispiv-39	180	6	features	feature	NOUN
ispiv-39	180	7	of	of	ADP
ispiv-39	180	8	the	the	DET
ispiv-39	180	9	vorticity	vorticity	NOUN
ispiv-39	180	10	distributions	distribution	NOUN
ispiv-39	180	11	were	be	AUX
ispiv-39	180	12	found	find	VERB
ispiv-39	180	13	to	to	PART
ispiv-39	180	14	be	be	AUX
ispiv-39	180	15	quite	quite	ADV
ispiv-39	180	16	similar	similar	ADJ
ispiv-39	180	17	for	for	ADP
ispiv-39	180	18	both	both	DET
ispiv-39	180	19	cases	case	NOUN
ispiv-39	180	20	,	,	PUNCT
ispiv-39	180	21	especially	especially	ADV
ispiv-39	180	22	for	for	ADP
ispiv-39	180	23	the	the	DET
ispiv-39	180	24	upper	upper	ADJ
ispiv-39	180	25	-	-	PUNCT
ispiv-39	180	26	part	part	NOUN
ispiv-39	180	27	region	region	NOUN
ispiv-39	180	28	(	(	PUNCT
ispiv-39	180	29	i.e.	i.e.	X
ispiv-39	180	30	,	,	PUNCT
ispiv-39	180	31	as	as	SCONJ
ispiv-39	180	32	indicated	indicate	VERB
ispiv-39	180	33	using	use	VERB
ispiv-39	180	34	red	red	ADJ
ispiv-39	180	35	dash	dash	NOUN
ispiv-39	180	36	line	line	NOUN
ispiv-39	180	37	)	)	PUNCT
ispiv-39	180	38	.	.	PUNCT
ispiv-39	181	1	flows	flow	VERB
ispiv-39	181	2	behind	behind	ADP
ispiv-39	181	3	the	the	DET
ispiv-39	181	4	rotors	rotor	NOUN
ispiv-39	181	5	were	be	AUX
ispiv-39	181	6	distinguished	distinguish	VERB
ispiv-39	181	7	by	by	ADP
ispiv-39	181	8	pairs	pair	NOUN
ispiv-39	181	9	of	of	ADP
ispiv-39	181	10	tip	tip	NOUN
ispiv-39	181	11	vortices	vortex	NOUN
ispiv-39	181	12	(	(	PUNCT
ispiv-39	181	13	i.e.	i.e.	X
ispiv-39	181	14	,	,	PUNCT
ispiv-39	181	15	#	#	NOUN
ispiv-39	181	16	1	1	NUM
ispiv-39	181	17	5	5	NUM
ispiv-39	181	18	)	)	PUNCT
ispiv-39	181	19	and	and	CCONJ
ispiv-39	181	20	shear	shear	NOUN
ispiv-39	181	21	layers	layer	NOUN
ispiv-39	181	22	(	(	PUNCT
ispiv-39	181	23	i.e.	i.e.	X
ispiv-39	181	24	,	,	PUNCT
ispiv-39	181	25	#	#	NOUN
ispiv-39	181	26	a	a	DET
ispiv-39	181	27	d	d	NOUN
ispiv-39	181	28	)	)	PUNCT
ispiv-39	181	29	that	that	PRON
ispiv-39	181	30	trailed	trail	VERB
ispiv-39	181	31	after	after	ADP
ispiv-39	181	32	the	the	DET
ispiv-39	181	33	blades	blade	NOUN
ispiv-39	181	34	.	.	PUNCT
ispiv-39	182	1	note	note	VERB
ispiv-39	182	2	that	that	SCONJ
ispiv-39	182	3	,	,	PUNCT
ispiv-39	182	4	the	the	DET
ispiv-39	182	5	tip	tip	NOUN
ispiv-39	182	6	vortices	vortex	NOUN
ispiv-39	182	7	were	be	AUX
ispiv-39	182	8	formed	form	VERB
ispiv-39	182	9	because	because	SCONJ
ispiv-39	182	10	of	of	ADP
ispiv-39	182	11	the	the	DET
ispiv-39	182	12	pressure	pressure	NOUN
ispiv-39	182	13	differences	difference	NOUN
ispiv-39	182	14	within	within	ADP
ispiv-39	182	15	the	the	DET
ispiv-39	182	16	two	two	NUM
ispiv-39	182	17	sides	side	NOUN
ispiv-39	182	18	of	of	ADP
ispiv-39	182	19	blade	blade	NOUN
ispiv-39	182	20	,	,	PUNCT
ispiv-39	182	21	while	while	SCONJ
ispiv-39	182	22	the	the	DET
ispiv-39	182	23	shear	shear	NOUN
ispiv-39	182	24	layers	layer	NOUN
ispiv-39	182	25	were	be	AUX
ispiv-39	182	26	generated	generate	VERB
ispiv-39	182	27	due	due	ADP
ispiv-39	182	28	to	to	ADP
ispiv-39	182	29	the	the	DET
ispiv-39	182	30	merging	merging	NOUN
ispiv-39	182	31	of	of	ADP
ispiv-39	182	32	boundary	boundary	ADJ
ispiv-39	182	33	layers	layer	NOUN
ispiv-39	182	34	from	from	ADP
ispiv-39	182	35	the	the	DET
ispiv-39	182	36	upper	upper	ADJ
ispiv-39	182	37	and	and	CCONJ
ispiv-39	182	38	lower	low	ADJ
ispiv-39	182	39	surfaces	surface	NOUN
ispiv-39	182	40	of	of	ADP
ispiv-39	182	41	the	the	DET
ispiv-39	182	42	blade	blade	NOUN
ispiv-39	182	43	.	.	PUNCT
ispiv-39	183	1	(	(	PUNCT
ispiv-39	183	2	a	a	X
ispiv-39	183	3	)	)	PUNCT
ispiv-39	183	4	phase	phase	NOUN
ispiv-39	183	5	angle	angle	NOUN
ispiv-39	183	6	θ	θ	NOUN
ispiv-39	183	7	=	=	SYM
ispiv-39	183	8	0º.	0º.	NUM
ispiv-39	183	9	(	(	PUNCT
ispiv-39	183	10	b	b	NOUN
ispiv-39	183	11	)	)	PUNCT
ispiv-39	183	12	phase	phase	NOUN
ispiv-39	183	13	angle	angle	NOUN
ispiv-39	183	14	θ	θ	NOUN
ispiv-39	183	15	=	=	SYM
ispiv-39	183	16	120º	120º	NOUN
ispiv-39	183	17	figure	figure	VERB
ispiv-39	183	18	8	8	NUM
ispiv-39	183	19	.	.	PUNCT
ispiv-39	183	20	phase	phase	NOUN
ispiv-39	183	21	-	-	PUNCT
ispiv-39	183	22	locked	lock	VERB
ispiv-39	183	23	vorticity	vorticity	NOUN
ispiv-39	183	24	distributions	distribution	NOUN
ispiv-39	183	25	for	for	ADP
ispiv-39	183	26	the	the	DET
ispiv-39	183	27	single	single	ADJ
ispiv-39	183	28	rotor	rotor	NOUN
ispiv-39	183	29	(	(	PUNCT
ispiv-39	183	30	left	leave	VERB
ispiv-39	183	31	)	)	PUNCT
ispiv-39	183	32	and	and	CCONJ
ispiv-39	183	33	twin	twin	ADJ
ispiv-39	183	34	rotors	rotor	NOUN
ispiv-39	183	35	(	(	PUNCT
ispiv-39	183	36	right	right	ADJ
ispiv-39	183	37	,	,	PUNCT
ispiv-39	183	38	l=0.05d	l=0.05d	ADJ
ispiv-39	183	39	)	)	PUNCT
ispiv-39	183	40	configurations	configuration	NOUN
ispiv-39	183	41	:	:	PUNCT
ispiv-39	183	42	for	for	ADP
ispiv-39	183	43	the	the	DET
ispiv-39	183	44	single	single	ADJ
ispiv-39	183	45	rotor	rotor	NOUN
ispiv-39	183	46	case	case	NOUN
ispiv-39	183	47	,	,	PUNCT
ispiv-39	183	48	when	when	SCONJ
ispiv-39	183	49	the	the	DET
ispiv-39	183	50	pre	pre	ADJ
ispiv-39	183	51	-	-	ADJ
ispiv-39	183	52	marked	marked	ADJ
ispiv-39	183	53	blade	blade	NOUN
ispiv-39	183	54	rotated	rotate	VERB
ispiv-39	183	55	over	over	ADP
ispiv-39	183	56	the	the	DET
ispiv-39	183	57	piv	piv	NOUN
ispiv-39	183	58	measurement	measurement	NOUN
ispiv-39	183	59	plane	plane	NOUN
ispiv-39	183	60	,	,	PUNCT
ispiv-39	183	61	a	a	DET
ispiv-39	183	62	tip	tip	NOUN
ispiv-39	183	63	vortex	vortex	NOUN
ispiv-39	183	64	would	would	AUX
ispiv-39	183	65	shed	shed	VERB
ispiv-39	183	66	from	from	ADP
ispiv-39	183	67	the	the	DET
ispiv-39	183	68	tip	tip	NOUN
ispiv-39	183	69	and	and	CCONJ
ispiv-39	183	70	propagate	propagate	VERB
ispiv-39	183	71	axially	axially	ADV
ispiv-39	183	72	downstream	downstream	ADJ
ispiv-39	183	73	,	,	PUNCT
ispiv-39	183	74	shown	show	VERB
ispiv-39	183	75	in	in	ADP
ispiv-39	183	76	fig	fig	NOUN
ispiv-39	183	77	.	.	PUNCT
ispiv-39	184	1	8	8	NUM
ispiv-39	184	2	(	(	PUNCT
ispiv-39	184	3	a	a	NOUN
ispiv-39	184	4	)	)	PUNCT
ispiv-39	184	5	.	.	PUNCT
ispiv-39	185	1	during	during	ADP
ispiv-39	185	2	this	this	DET
ispiv-39	185	3	process	process	NOUN
ispiv-39	185	4	,	,	PUNCT
ispiv-39	185	5	pairs	pair	NOUN
ispiv-39	185	6	of	of	ADP
ispiv-39	185	7	vortex	vortex	NOUN
ispiv-39	185	8	structures	structure	NOUN
ispiv-39	185	9	(	(	PUNCT
ispiv-39	185	10	i.e.	i.e.	X
ispiv-39	185	11	,	,	PUNCT
ispiv-39	185	12	such	such	ADJ
ispiv-39	185	13	as	as	ADP
ispiv-39	185	14	vortex	vortex	NOUN
ispiv-39	185	15	#	#	NOUN
ispiv-39	185	16	4	4	NUM
ispiv-39	185	17	with	with	ADP
ispiv-39	185	18	#	#	NOUN
ispiv-39	185	19	3	3	NUM
ispiv-39	185	20	,	,	PUNCT
ispiv-39	185	21	and	and	CCONJ
ispiv-39	185	22	vortex	vortex	NOUN
ispiv-39	185	23	#	#	NOUN
ispiv-39	185	24	2	2	NUM
ispiv-39	185	25	with	with	ADP
ispiv-39	185	26	#	#	NOUN
ispiv-39	185	27	1	1	NUM
ispiv-39	185	28	)	)	PUNCT
ispiv-39	185	29	would	would	AUX
ispiv-39	185	30	slowly	slowly	ADV
ispiv-39	185	31	merge	merge	VERB
ispiv-39	185	32	into	into	ADP
ispiv-39	185	33	an	an	DET
ispiv-39	185	34	integral	integral	ADJ
ispiv-39	185	35	one	one	NOUN
ispiv-39	185	36	at	at	ADP
ispiv-39	185	37	~	~	PUNCT
ispiv-39	185	38	0.7d	0.7d	PROPN
ispiv-39	185	39	.	.	PUNCT
ispiv-39	186	1	as	as	SCONJ
ispiv-39	186	2	the	the	DET
ispiv-39	186	3	flow	flow	NOUN
ispiv-39	186	4	convected	convect	VERB
ispiv-39	186	5	further	far	ADV
ispiv-39	186	6	downstream	downstream	ADV
ispiv-39	186	7	,	,	PUNCT
ispiv-39	186	8	they	they	PRON
ispiv-39	186	9	would	would	AUX
ispiv-39	186	10	completely	completely	ADV
ispiv-39	186	11	vanish	vanish	VERB
ispiv-39	186	12	beyond	beyond	ADP
ispiv-39	186	13	1.0d	1.0d	PROPN
ispiv-39	186	14	due	due	ADP
ispiv-39	186	15	to	to	ADP
ispiv-39	186	16	the	the	DET
ispiv-39	186	17	aperiodic	aperiodic	ADJ
ispiv-39	186	18	and	and	CCONJ
ispiv-39	186	19	highly	highly	ADV
ispiv-39	186	20	turbulent	turbulent	ADJ
ispiv-39	186	21	flow	flow	NOUN
ispiv-39	186	22	in	in	ADP
ispiv-39	186	23	the	the	DET
ispiv-39	186	24	rotor	rotor	NOUN
ispiv-39	186	25	wake	wake	NOUN
ispiv-39	186	26	.	.	PUNCT
ispiv-39	187	1	as	as	ADP
ispiv-39	187	2	for	for	ADP
ispiv-39	187	3	the	the	DET
ispiv-39	187	4	twin	twin	ADJ
ispiv-39	187	5	-	-	PUNCT
ispiv-39	187	6	rotor	rotor	NOUN
ispiv-39	187	7	case	case	NOUN
ispiv-39	187	8	(	(	PUNCT
ispiv-39	187	9	i.e.	i.e.	X
ispiv-39	187	10	,	,	PUNCT
ispiv-39	187	11	l	l	X
ispiv-39	187	12	=	=	SYM
ispiv-39	187	13	0.05d	0.05d	PROPN
ispiv-39	187	14	)	)	PUNCT
ispiv-39	187	15	,	,	PUNCT
ispiv-39	187	16	though	though	SCONJ
ispiv-39	187	17	similar	similar	ADJ
ispiv-39	187	18	distributions	distribution	NOUN
ispiv-39	187	19	can	can	AUX
ispiv-39	187	20	be	be	AUX
ispiv-39	187	21	observed	observe	VERB
ispiv-39	187	22	for	for	ADP
ispiv-39	187	23	the	the	DET
ispiv-39	187	24	shear	shear	NOUN
ispiv-39	187	25	layer	layer	NOUN
ispiv-39	187	26	(	(	PUNCT
ispiv-39	187	27	i.e.	i.e.	X
ispiv-39	187	28	,	,	PUNCT
ispiv-39	187	29	#	#	NOUN
ispiv-39	187	30	a	a	NOUN
ispiv-39	187	31	–	–	PUNCT
ispiv-39	187	32	d	d	NOUN
ispiv-39	187	33	)	)	PUNCT
ispiv-39	187	34	,	,	PUNCT
ispiv-39	187	35	tip	tip	NOUN
ispiv-39	187	36	vortices	vortex	NOUN
ispiv-39	187	37	were	be	AUX
ispiv-39	187	38	found	find	VERB
ispiv-39	187	39	to	to	PART
ispiv-39	187	40	merge	merge	VERB
ispiv-39	187	41	and	and	CCONJ
ispiv-39	187	42	dissipate	dissipate	VERB
ispiv-39	187	43	much	much	ADV
ispiv-39	187	44	faster	fast	ADV
ispiv-39	187	45	in	in	ADP
ispiv-39	187	46	comparison	comparison	NOUN
ispiv-39	187	47	with	with	ADP
ispiv-39	187	48	that	that	PRON
ispiv-39	187	49	of	of	ADP
ispiv-39	187	50	the	the	DET
ispiv-39	187	51	single	single	ADJ
ispiv-39	187	52	rotor	rotor	NOUN
ispiv-39	187	53	case	case	NOUN
ispiv-39	187	54	.	.	PUNCT
ispiv-39	188	1	representative	representative	ADJ
ispiv-39	188	2	examples	example	NOUN
ispiv-39	188	3	are	be	AUX
ispiv-39	188	4	the	the	DET
ispiv-39	188	5	isolated	isolate	VERB
ispiv-39	188	6	vortices	vortex	NOUN
ispiv-39	188	7	(	(	PUNCT
ispiv-39	188	8	i.e.	i.e.	X
ispiv-39	188	9	,	,	PUNCT
ispiv-39	188	10	#	#	NOUN
ispiv-39	188	11	1	1	NUM
ispiv-39	188	12	,	,	PUNCT
ispiv-39	188	13	#	#	NOUN
ispiv-39	188	14	2	2	NUM
ispiv-39	188	15	,	,	PUNCT
ispiv-39	188	16	#	#	NOUN
ispiv-39	188	17	3	3	NUM
ispiv-39	188	18	,	,	PUNCT
ispiv-39	188	19	#	#	NOUN
ispiv-39	188	20	4	4	NUM
ispiv-39	188	21	)	)	PUNCT
ispiv-39	188	22	,	,	PUNCT
ispiv-39	188	23	shown	show	VERB
ispiv-39	188	24	in	in	ADP
ispiv-39	188	25	the	the	DET
ispiv-39	188	26	case	case	NOUN
ispiv-39	188	27	of	of	ADP
ispiv-39	188	28	single	single	ADJ
ispiv-39	188	29	rotor	rotor	NOUN
ispiv-39	188	30	,	,	PUNCT
ispiv-39	188	31	that	that	PRON
ispiv-39	188	32	become	become	VERB
ispiv-39	188	33	much	much	ADV
ispiv-39	188	34	harder	hard	ADJ
ispiv-39	188	35	to	to	PART
ispiv-39	188	36	discern	discern	VERB
ispiv-39	188	37	as	as	ADP
ispiv-39	188	38	z	z	PROPN
ispiv-39	188	39	/	/	SYM
ispiv-39	188	40	d	d	X
ispiv-39	188	41	>	>	PROPN
ispiv-39	188	42	0.2	0.2	NUM
ispiv-39	188	43	in	in	ADP
ispiv-39	188	44	twin	twin	ADJ
ispiv-39	188	45	-	-	PUNCT
ispiv-39	188	46	rotor	rotor	NOUN
ispiv-39	188	47	case	case	NOUN
ispiv-39	188	48	.	.	PUNCT
ispiv-39	189	1	as	as	SCONJ
ispiv-39	189	2	the	the	DET
ispiv-39	189	3	phase	phase	NOUN
ispiv-39	189	4	angle	angle	NOUN
ispiv-39	189	5	increased	increase	VERB
ispiv-39	189	6	to	to	ADP
ispiv-39	189	7	θ	θ	PROPN
ispiv-39	189	8	=	=	SYM
ispiv-39	189	9	120	120	NUM
ispiv-39	189	10	°	°	NUM
ispiv-39	189	11	,	,	PUNCT
ispiv-39	189	12	the	the	DET
ispiv-39	189	13	associated	associated	ADJ
ispiv-39	189	14	turbulent	turbulent	ADJ
ispiv-39	189	15	structures	structure	NOUN
ispiv-39	189	16	,	,	PUNCT
ispiv-39	189	17	such	such	ADJ
ispiv-39	189	18	as	as	ADP
ispiv-39	189	19	the	the	DET
ispiv-39	189	20	shear	shear	NOUN
ispiv-39	189	21	layers	layer	NOUN
ispiv-39	189	22	and	and	CCONJ
ispiv-39	189	23	tip	tip	NOUN
ispiv-39	189	24	vortices	vortex	NOUN
ispiv-39	189	25	,	,	PUNCT
ispiv-39	189	26	were	be	AUX
ispiv-39	189	27	found	find	VERB
ispiv-39	189	28	to	to	PART
ispiv-39	189	29	propagate	propagate	VERB
ispiv-39	189	30	downstream	downstream	ADV
ispiv-39	189	31	in	in	ADP
ispiv-39	189	32	contrast	contrast	NOUN
ispiv-39	189	33	to	to	ADP
ispiv-39	189	34	that	that	PRON
ispiv-39	189	35	of	of	ADP
ispiv-39	189	36	θ	θ	PROPN
ispiv-39	189	37	=	=	SYM
ispiv-39	189	38	0	0	NUM
ispiv-39	189	39	°	°	NUM
ispiv-39	189	40	.	.	PUNCT
ispiv-39	189	41	focusing	focus	VERB
ispiv-39	189	42	on	on	ADP
ispiv-39	189	43	the	the	DET
ispiv-39	189	44	evolution	evolution	NOUN
ispiv-39	189	45	of	of	ADP
ispiv-39	189	46	the	the	DET
ispiv-39	189	47	vortex	vortex	NOUN
ispiv-39	189	48	sheet	sheet	NOUN
ispiv-39	189	49	#	#	NOUN
ispiv-39	189	50	d	d	NOUN
ispiv-39	189	51	(	(	PUNCT
ispiv-39	189	52	i.e.	i.e.	X
ispiv-39	189	53	,	,	PUNCT
ispiv-39	189	54	shear	shear	NOUN
ispiv-39	189	55	layer	layer	NOUN
ispiv-39	189	56	#	#	NOUN
ispiv-39	189	57	d	d	PROPN
ispiv-39	189	58	)	)	PUNCT
ispiv-39	189	59	,	,	PUNCT
ispiv-39	189	60	it	it	PRON
ispiv-39	189	61	was	be	AUX
ispiv-39	189	62	initially	initially	ADV
ispiv-39	189	63	adjacent	adjacent	ADJ
ispiv-39	189	64	to	to	PART
ispiv-39	189	65	tip	tip	VERB
ispiv-39	189	66	vortex	vortex	NOUN
ispiv-39	189	67	#	#	NOUN
ispiv-39	189	68	4	4	NUM
ispiv-39	189	69	.	.	PUNCT
ispiv-39	190	1	as	as	ADP
ispiv-39	190	2	vortices	vortex	NOUN
ispiv-39	190	3	convected	convect	VERB
ispiv-39	190	4	axially	axially	ADV
ispiv-39	190	5	downstream	downstream	ADJ
ispiv-39	190	6	,	,	PUNCT
ispiv-39	190	7	however	however	ADV
ispiv-39	190	8	the	the	DET
ispiv-39	190	9	outboard	outboard	NOUN
ispiv-39	190	10	edge	edge	NOUN
ispiv-39	190	11	of	of	ADP
ispiv-39	190	12	the	the	DET
ispiv-39	190	13	shear	shear	NOUN
ispiv-39	190	14	layer	layer	NOUN
ispiv-39	190	15	#	#	NOUN
ispiv-39	190	16	d	d	NOUN
ispiv-39	190	17	in	in	ADP
ispiv-39	190	18	fig	fig	NOUN
ispiv-39	190	19	.	.	PUNCT
ispiv-39	191	1	8	8	NUM
ispiv-39	191	2	(	(	PUNCT
ispiv-39	191	3	b	b	NOUN
ispiv-39	191	4	)	)	PUNCT
ispiv-39	191	5	was	be	AUX
ispiv-39	191	6	found	find	VERB
ispiv-39	191	7	to	to	PART
ispiv-39	191	8	interact	interact	VERB
ispiv-39	191	9	with	with	ADP
ispiv-39	191	10	the	the	DET
ispiv-39	191	11	tip	tip	NOUN
ispiv-39	191	12	vortex	vortex	NOUN
ispiv-39	191	13	#	#	NOUN
ispiv-39	191	14	3	3	NUM
ispiv-39	191	15	rather	rather	ADV
ispiv-39	191	16	than	than	ADP
ispiv-39	191	17	vortex	vortex	NOUN
ispiv-39	191	18	#	#	NOUN
ispiv-39	191	19	4	4	NUM
ispiv-39	191	20	.	.	PUNCT
ispiv-39	192	1	this	this	PRON
ispiv-39	192	2	is	be	AUX
ispiv-39	192	3	because	because	SCONJ
ispiv-39	192	4	the	the	DET
ispiv-39	192	5	convecting	convect	VERB
ispiv-39	192	6	speed	speed	NOUN
ispiv-39	192	7	(	(	PUNCT
ispiv-39	192	8	i.e.	i.e.	X
ispiv-39	192	9	,	,	PUNCT
ispiv-39	192	10	w	w	NOUN
ispiv-39	192	11	velocity	velocity	NOUN
ispiv-39	192	12	shown	show	VERB
ispiv-39	192	13	in	in	ADP
ispiv-39	192	14	fig	fig	NOUN
ispiv-39	192	15	.	.	PUNCT
ispiv-39	192	16	7	7	NUM
ispiv-39	192	17	)	)	PUNCT
ispiv-39	192	18	of	of	ADP
ispiv-39	192	19	the	the	DET
ispiv-39	192	20	shear	shear	NOUN
ispiv-39	192	21	layer	layer	NOUN
ispiv-39	192	22	was	be	AUX
ispiv-39	192	23	much	much	ADV
ispiv-39	192	24	higher	high	ADJ
ispiv-39	192	25	than	than	ADP
ispiv-39	192	26	that	that	PRON
ispiv-39	192	27	of	of	ADP
ispiv-39	192	28	the	the	DET
ispiv-39	192	29	tip	tip	NOUN
ispiv-39	192	30	vortex	vortex	NOUN
ispiv-39	192	31	,	,	PUNCT
ispiv-39	192	32	thus	thus	ADV
ispiv-39	192	33	the	the	DET
ispiv-39	192	34	outboard	outboard	NOUN
ispiv-39	192	35	edge	edge	NOUN
ispiv-39	192	36	of	of	ADP
ispiv-39	192	37	the	the	DET
ispiv-39	192	38	shear	shear	NOUN
ispiv-39	192	39	layer	layer	NOUN
ispiv-39	192	40	would	would	AUX
ispiv-39	192	41	surpass	surpass	VERB
ispiv-39	192	42	the	the	DET
ispiv-39	192	43	corresponding	correspond	VERB
ispiv-39	192	44	vortex	vortex	NOUN
ispiv-39	192	45	,	,	PUNCT
ispiv-39	192	46	leading	lead	VERB
ispiv-39	192	47	to	to	ADP
ispiv-39	192	48	complex	complex	ADJ
ispiv-39	192	49	vortex	vortex	NOUN
ispiv-39	192	50	interactions	interaction	NOUN
ispiv-39	192	51	.	.	PUNCT
ispiv-39	193	1	very	very	ADV
ispiv-39	193	2	similar	similar	ADJ
ispiv-39	193	3	phenomena	phenomenon	NOUN
ispiv-39	193	4	were	be	AUX
ispiv-39	193	5	also	also	ADV
ispiv-39	193	6	reported	report	VERB
ispiv-39	193	7	by	by	ADP
ispiv-39	193	8	leishman	leishman	PROPN
ispiv-39	193	9	(	(	PUNCT
ispiv-39	193	10	leishman	leishman	NOUN
ispiv-39	193	11	2006	2006	NUM
ispiv-39	193	12	)	)	PUNCT
ispiv-39	193	13	,	,	PUNCT
ispiv-39	193	14	who	who	PRON
ispiv-39	193	15	described	describe	VERB
ispiv-39	193	16	the	the	DET
ispiv-39	193	17	wake	wake	NOUN
ispiv-39	193	18	characteristics	characteristic	NOUN
ispiv-39	193	19	behind	behind	ADP
ispiv-39	193	20	a	a	DET
ispiv-39	193	21	helicopter	helicopter	NOUN
ispiv-39	193	22	rotor	rotor	NOUN
ispiv-39	193	23	.	.	PUNCT
ispiv-39	194	1	e.	e.	PROPN
ispiv-39	194	2	stereoscopic	stereoscopic	PROPN
ispiv-39	194	3	piv	piv	PROPN
ispiv-39	194	4	measurement	measurement	NOUN
ispiv-39	194	5	results	result	VERB
ispiv-39	194	6	to	to	PART
ispiv-39	194	7	further	far	ADV
ispiv-39	194	8	explore	explore	VERB
ispiv-39	194	9	the	the	DET
ispiv-39	194	10	underlying	underlie	VERB
ispiv-39	194	11	physics	physics	NOUN
ispiv-39	194	12	pertinent	pertinent	NOUN
ispiv-39	194	13	to	to	ADP
ispiv-39	194	14	rotor	rotor	NOUN
ispiv-39	194	15	-	-	PUNCT
ispiv-39	194	16	to	to	ADP
ispiv-39	194	17	-	-	PUNCT
ispiv-39	194	18	rotor	rotor	NOUN
ispiv-39	194	19	interactions	interaction	NOUN
ispiv-39	194	20	of	of	ADP
ispiv-39	194	21	small	small	ADJ
ispiv-39	194	22	uavs	uavs	NOUN
ispiv-39	194	23	,	,	PUNCT
ispiv-39	194	24	a	a	DET
ispiv-39	194	25	stereoscopic	stereoscopic	ADJ
ispiv-39	194	26	piv	piv	NOUN
ispiv-39	194	27	(	(	PUNCT
ispiv-39	194	28	spiv	spiv	NOUN
ispiv-39	194	29	)	)	PUNCT
ispiv-39	194	30	system	system	NOUN
ispiv-39	194	31	was	be	AUX
ispiv-39	194	32	also	also	ADV
ispiv-39	194	33	utilized	utilize	VERB
ispiv-39	194	34	to	to	PART
ispiv-39	194	35	quantify	quantify	VERB
ispiv-39	194	36	the	the	DET
ispiv-39	194	37	complex	complex	ADJ
ispiv-39	194	38	flow	flow	NOUN
ispiv-39	194	39	field	field	NOUN
ispiv-39	194	40	behind	behind	ADP
ispiv-39	194	41	the	the	DET
ispiv-39	194	42	rotors	rotor	NOUN
ispiv-39	194	43	at	at	ADP
ispiv-39	194	44	multiple	multiple	ADJ
ispiv-39	194	45	locations	location	NOUN
ispiv-39	194	46	along	along	ADP
ispiv-39	194	47	the	the	DET
ispiv-39	194	48	induced	induced	ADJ
ispiv-39	194	49	flow	flow	NOUN
ispiv-39	194	50	direction	direction	NOUN
ispiv-39	194	51	.	.	PUNCT
ispiv-39	195	1	note	note	VERB
ispiv-39	195	2	that	that	SCONJ
ispiv-39	195	3	the	the	DET
ispiv-39	195	4	vectors	vector	NOUN
ispiv-39	195	5	shown	show	VERB
ispiv-39	195	6	in	in	ADP
ispiv-39	195	7	figure	figure	NOUN
ispiv-39	195	8	9	9	NUM
ispiv-39	195	9	and	and	CCONJ
ispiv-39	195	10	10	10	NUM
ispiv-39	195	11	are	be	AUX
ispiv-39	195	12	the	the	DET
ispiv-39	195	13	resultant	resultant	NOUN
ispiv-39	195	14	vectors	vector	NOUN
ispiv-39	195	15	of	of	ADP
ispiv-39	195	16	in	in	ADP
ispiv-39	195	17	-	-	PUNCT
ispiv-39	195	18	plane	plane	NOUN
ispiv-39	195	19	radial	radial	ADJ
ispiv-39	195	20	and	and	CCONJ
ispiv-39	195	21	tangential	tangential	ADJ
ispiv-39	195	22	velocities	velocity	NOUN
ispiv-39	195	23	behind	behind	ADP
ispiv-39	195	24	the	the	DET
ispiv-39	195	25	rotor	rotor	NOUN
ispiv-39	195	26	.	.	PUNCT
ispiv-39	196	1	fig	fig	NOUN
ispiv-39	196	2	.	.	PUNCT
ispiv-39	197	1	9	9	NUM
ispiv-39	197	2	and	and	CCONJ
ispiv-39	197	3	fig	fig	NOUN
ispiv-39	197	4	.	.	PUNCT
ispiv-39	198	1	10	10	NUM
ispiv-39	198	2	show	show	VERB
ispiv-39	198	3	the	the	DET
ispiv-39	198	4	comparisons	comparison	NOUN
ispiv-39	198	5	of	of	ADP
ispiv-39	198	6	the	the	DET
ispiv-39	198	7	ensemble	ensemble	ADV
ispiv-39	198	8	-	-	PUNCT
ispiv-39	198	9	averaged	average	VERB
ispiv-39	198	10	turbulent	turbulent	ADJ
ispiv-39	198	11	quantities	quantity	NOUN
ispiv-39	198	12	between	between	ADP
ispiv-39	198	13	the	the	DET
ispiv-39	198	14	single	single	ADJ
ispiv-39	198	15	rotor	rotor	NOUN
ispiv-39	198	16	and	and	CCONJ
ispiv-39	198	17	twin	twin	ADJ
ispiv-39	198	18	-	-	PUNCT
ispiv-39	198	19	rotor	rotor	NOUN
ispiv-39	198	20	cases	case	NOUN
ispiv-39	198	21	at	at	ADP
ispiv-39	198	22	the	the	DET
ispiv-39	198	23	downstream	downstream	ADJ
ispiv-39	198	24	locations	location	NOUN
ispiv-39	198	25	of	of	ADP
ispiv-39	198	26	x	x	PROPN
ispiv-39	198	27	/	/	SYM
ispiv-39	198	28	d	d	NOUN
ispiv-39	198	29	=	=	SYM
ispiv-39	198	30	0.1	0.1	NUM
ispiv-39	198	31	and	and	CCONJ
ispiv-39	198	32	1.0	1.0	NUM
ispiv-39	198	33	respectively	respectively	ADV
ispiv-39	198	34	.	.	PUNCT
ispiv-39	199	1	as	as	SCONJ
ispiv-39	199	2	revealed	reveal	VERB
ispiv-39	199	3	clearly	clearly	ADV
ispiv-39	199	4	in	in	ADP
ispiv-39	199	5	fig	fig	NOUN
ispiv-39	199	6	.	.	PUNCT
ispiv-39	200	1	9	9	NUM
ispiv-39	200	2	(	(	PUNCT
ispiv-39	200	3	a	a	NOUN
ispiv-39	200	4	)	)	PUNCT
ispiv-39	200	5	,	,	PUNCT
ispiv-39	200	6	the	the	DET
ispiv-39	200	7	mean	mean	ADJ
ispiv-39	200	8	velocity	velocity	NOUN
ispiv-39	200	9	contour	contour	NOUN
ispiv-39	200	10	(	(	PUNCT
ispiv-39	200	11	i.e.	i.e.	X
ispiv-39	200	12	,	,	PUNCT
ispiv-39	200	13	w	w	NOUN
ispiv-39	200	14	component	component	NOUN
ispiv-39	200	15	)	)	PUNCT
ispiv-39	200	16	behind	behind	ADP
ispiv-39	200	17	the	the	DET
ispiv-39	200	18	single	single	ADJ
ispiv-39	200	19	rotor	rotor	NOUN
ispiv-39	200	20	was	be	AUX
ispiv-39	200	21	found	find	VERB
ispiv-39	200	22	to	to	PART
ispiv-39	200	23	be	be	AUX
ispiv-39	200	24	circular	circular	ADJ
ispiv-39	200	25	and	and	CCONJ
ispiv-39	200	26	symmetric	symmetric	ADJ
ispiv-39	200	27	as	as	SCONJ
ispiv-39	200	28	expected	expect	VERB
ispiv-39	200	29	.	.	PUNCT
ispiv-39	201	1	interestingly	interestingly	ADV
ispiv-39	201	2	,	,	PUNCT
ispiv-39	201	3	the	the	DET
ispiv-39	201	4	rotating	rotate	VERB
ispiv-39	201	5	direction	direction	NOUN
ispiv-39	201	6	of	of	ADP
ispiv-39	201	7	the	the	DET
ispiv-39	201	8	wake	wake	NOUN
ispiv-39	201	9	flow	flow	NOUN
ispiv-39	201	10	was	be	AUX
ispiv-39	201	11	found	find	VERB
ispiv-39	201	12	to	to	PART
ispiv-39	201	13	be	be	AUX
ispiv-39	201	14	in	in	ADP
ispiv-39	201	15	the	the	DET
ispiv-39	201	16	same	same	ADJ
ispiv-39	201	17	direction	direction	NOUN
ispiv-39	201	18	with	with	ADP
ispiv-39	201	19	that	that	PRON
ispiv-39	201	20	of	of	ADP
ispiv-39	201	21	the	the	DET
ispiv-39	201	22	rotor	rotor	NOUN
ispiv-39	201	23	blade	blade	NOUN
ispiv-39	201	24	(	(	PUNCT
ispiv-39	201	25	i.e.	i.e.	X
ispiv-39	201	26	,	,	PUNCT
ispiv-39	201	27	both	both	PRON
ispiv-39	201	28	in	in	ADP
ispiv-39	201	29	counter	counter	NOUN
ispiv-39	201	30	-	-	NOUN
ispiv-39	201	31	clockwise	clockwise	NOUN
ispiv-39	201	32	)	)	PUNCT
ispiv-39	201	33	,	,	PUNCT
ispiv-39	201	34	which	which	PRON
ispiv-39	201	35	is	be	AUX
ispiv-39	201	36	contrary	contrary	ADJ
ispiv-39	201	37	to	to	ADP
ispiv-39	201	38	the	the	DET
ispiv-39	201	39	wind	wind	NOUN
ispiv-39	201	40	turbine	turbine	NOUN
ispiv-39	201	41	scenario	scenario	NOUN
ispiv-39	201	42	(	(	PUNCT
ispiv-39	201	43	hu	hu	PROPN
ispiv-39	201	44	et	et	PROPN
ispiv-39	201	45	al	al	PROPN
ispiv-39	201	46	.	.	PROPN
ispiv-39	201	47	2016	2016	NUM
ispiv-39	201	48	;	;	PUNCT
ispiv-39	201	49	wang	wang	PROPN
ispiv-39	201	50	et	et	PROPN
ispiv-39	201	51	al	al	PROPN
ispiv-39	201	52	.	.	PROPN
ispiv-39	201	53	2016	2016	NUM
ispiv-39	201	54	)	)	PUNCT
ispiv-39	201	55	,	,	PUNCT
ispiv-39	201	56	where	where	SCONJ
ispiv-39	201	57	the	the	DET
ispiv-39	201	58	swirling	swirling	ADJ
ispiv-39	201	59	direction	direction	NOUN
ispiv-39	201	60	of	of	ADP
ispiv-39	201	61	the	the	DET
ispiv-39	201	62	wake	wake	NOUN
ispiv-39	201	63	is	be	AUX
ispiv-39	201	64	opposite	opposite	ADJ
ispiv-39	201	65	to	to	ADP
ispiv-39	201	66	the	the	DET
ispiv-39	201	67	wind	wind	NOUN
ispiv-39	201	68	turbine	turbine	NOUN
ispiv-39	201	69	rotation	rotation	NOUN
ispiv-39	201	70	.	.	PUNCT
ispiv-39	202	1	this	this	DET
ispiv-39	202	2	phenomenon	phenomenon	NOUN
ispiv-39	202	3	is	be	AUX
ispiv-39	202	4	caused	cause	VERB
ispiv-39	202	5	by	by	ADP
ispiv-39	202	6	an	an	DET
ispiv-39	202	7	inherent	inherent	ADJ
ispiv-39	202	8	working	working	NOUN
ispiv-39	202	9	mechanism	mechanism	NOUN
ispiv-39	202	10	difference	difference	NOUN
ispiv-39	202	11	where	where	SCONJ
ispiv-39	202	12	the	the	DET
ispiv-39	202	13	rotor	rotor	NOUN
ispiv-39	202	14	drives	drive	VERB
ispiv-39	202	15	the	the	DET
ispiv-39	202	16	flow	flow	NOUN
ispiv-39	202	17	in	in	ADP
ispiv-39	202	18	the	the	DET
ispiv-39	202	19	uav	uav	PROPN
ispiv-39	202	20	case	case	NOUN
ispiv-39	202	21	,	,	PUNCT
ispiv-39	202	22	but	but	CCONJ
ispiv-39	202	23	the	the	DET
ispiv-39	202	24	it	it	PRON
ispiv-39	202	25	is	be	AUX
ispiv-39	202	26	the	the	DET
ispiv-39	202	27	flow	flow	NOUN
ispiv-39	202	28	that	that	PRON
ispiv-39	202	29	drives	drive	VERB
ispiv-39	202	30	the	the	DET
ispiv-39	202	31	rotor	rotor	NOUN
ispiv-39	202	32	in	in	ADP
ispiv-39	202	33	the	the	DET
ispiv-39	202	34	wind	wind	NOUN
ispiv-39	202	35	turbine	turbine	NOUN
ispiv-39	202	36	case	case	NOUN
ispiv-39	202	37	.	.	PUNCT
ispiv-39	203	1	it	it	PRON
ispiv-39	203	2	should	should	AUX
ispiv-39	203	3	also	also	ADV
ispiv-39	203	4	be	be	AUX
ispiv-39	203	5	noted	note	VERB
ispiv-39	203	6	that	that	SCONJ
ispiv-39	203	7	while	while	SCONJ
ispiv-39	203	8	the	the	DET
ispiv-39	203	9	velocity	velocity	NOUN
ispiv-39	203	10	distribution	distribution	NOUN
ispiv-39	203	11	behind	behind	ADP
ispiv-39	203	12	the	the	DET
ispiv-39	203	13	single	single	ADJ
ispiv-39	203	14	rotor	rotor	NOUN
ispiv-39	203	15	was	be	AUX
ispiv-39	203	16	in	in	ADP
ispiv-39	203	17	a	a	DET
ispiv-39	203	18	circular	circular	ADJ
ispiv-39	203	19	shape	shape	NOUN
ispiv-39	203	20	,	,	PUNCT
ispiv-39	203	21	a	a	DET
ispiv-39	203	22	droplet	droplet	ADV
ispiv-39	203	23	-	-	PUNCT
ispiv-39	203	24	shaped	shape	VERB
ispiv-39	203	25	velocity	velocity	NOUN
ispiv-39	203	26	field	field	NOUN
ispiv-39	203	27	was	be	AUX
ispiv-39	203	28	observed	observe	VERB
ispiv-39	203	29	for	for	ADP
ispiv-39	203	30	the	the	DET
ispiv-39	203	31	twin	twin	ADJ
ispiv-39	203	32	-	-	PUNCT
ispiv-39	203	33	rotor	rotor	NOUN
ispiv-39	203	34	case	case	NOUN
ispiv-39	203	35	due	due	ADP
ispiv-39	203	36	to	to	ADP
ispiv-39	203	37	the	the	DET
ispiv-39	203	38	flow	flow	NOUN
ispiv-39	203	39	disturbance	disturbance	NOUN
ispiv-39	203	40	from	from	ADP
ispiv-39	203	41	the	the	DET
ispiv-39	203	42	nearby	nearby	ADJ
ispiv-39	203	43	rotor	rotor	NOUN
ispiv-39	203	44	.	.	PUNCT
ispiv-39	204	1	carefully	carefully	ADV
ispiv-39	204	2	inspecting	inspect	VERB
ispiv-39	204	3	the	the	DET
ispiv-39	204	4	flow	flow	NOUN
ispiv-39	204	5	features	feature	NOUN
ispiv-39	204	6	behind	behind	ADP
ispiv-39	204	7	the	the	DET
ispiv-39	204	8	twin	twin	ADJ
ispiv-39	204	9	rotors	rotor	NOUN
ispiv-39	204	10	,	,	PUNCT
ispiv-39	204	11	a	a	DET
ispiv-39	204	12	region	region	NOUN
ispiv-39	204	13	with	with	ADP
ispiv-39	204	14	flow	flow	NOUN
ispiv-39	204	15	separation	separation	NOUN
ispiv-39	204	16	was	be	AUX
ispiv-39	204	17	identified	identify	VERB
ispiv-39	204	18	at	at	ADP
ispiv-39	204	19	the	the	DET
ispiv-39	204	20	top	top	ADJ
ispiv-39	204	21	-	-	PUNCT
ispiv-39	204	22	right	right	NOUN
ispiv-39	204	23	corner	corner	NOUN
ispiv-39	204	24	,	,	PUNCT
ispiv-39	204	25	which	which	PRON
ispiv-39	204	26	is	be	AUX
ispiv-39	204	27	believed	believe	VERB
ispiv-39	204	28	to	to	PART
ispiv-39	204	29	be	be	AUX
ispiv-39	204	30	the	the	DET
ispiv-39	204	31	resultant	resultant	NOUN
ispiv-39	204	32	effect	effect	NOUN
ispiv-39	204	33	of	of	ADP
ispiv-39	204	34	upwash	upwash	NOUN
ispiv-39	204	35	flow	flow	NOUN
ispiv-39	204	36	and	and	CCONJ
ispiv-39	204	37	radial	radial	ADJ
ispiv-39	204	38	flow	flow	NOUN
ispiv-39	204	39	.	.	PUNCT
ispiv-39	205	1	within	within	ADP
ispiv-39	205	2	the	the	DET
ispiv-39	205	3	interaction	interaction	NOUN
ispiv-39	205	4	region	region	NOUN
ispiv-39	205	5	,	,	PUNCT
ispiv-39	205	6	the	the	DET
ispiv-39	205	7	two	two	NUM
ispiv-39	205	8	rotors	rotor	NOUN
ispiv-39	205	9	would	would	AUX
ispiv-39	205	10	generate	generate	VERB
ispiv-39	205	11	a	a	DET
ispiv-39	205	12	steady	steady	ADJ
ispiv-39	205	13	upwash	upwash	NOUN
ispiv-39	205	14	flow	flow	NOUN
ispiv-39	205	15	that	that	PRON
ispiv-39	205	16	interacts	interact	VERB
ispiv-39	205	17	severely	severely	ADV
ispiv-39	205	18	with	with	ADP
ispiv-39	205	19	the	the	DET
ispiv-39	205	20	radial	radial	ADJ
ispiv-39	205	21	flow	flow	NOUN
ispiv-39	205	22	,	,	PUNCT
ispiv-39	205	23	resulting	result	VERB
ispiv-39	205	24	in	in	ADP
ispiv-39	205	25	the	the	DET
ispiv-39	205	26	flow	flow	NOUN
ispiv-39	205	27	separation	separation	NOUN
ispiv-39	205	28	shown	show	VERB
ispiv-39	205	29	in	in	ADP
ispiv-39	205	30	fig	fig	NOUN
ispiv-39	205	31	.	.	PUNCT
ispiv-39	206	1	9	9	NUM
ispiv-39	206	2	(	(	PUNCT
ispiv-39	206	3	a	a	NOUN
ispiv-39	206	4	)	)	PUNCT
ispiv-39	206	5	.	.	PUNCT
ispiv-39	207	1	as	as	SCONJ
ispiv-39	207	2	the	the	DET
ispiv-39	207	3	airflow	airflow	NOUN
ispiv-39	207	4	traveled	travel	VERB
ispiv-39	207	5	further	far	ADV
ispiv-39	207	6	downstream	downstream	ADV
ispiv-39	207	7	to	to	ADP
ispiv-39	207	8	the	the	DET
ispiv-39	207	9	x	x	NOUN
ispiv-39	207	10	/	/	SYM
ispiv-39	207	11	d	d	NOUN
ispiv-39	207	12	=	=	SYM
ispiv-39	207	13	1.0	1.0	NUM
ispiv-39	207	14	plane	plane	NOUN
ispiv-39	207	15	,	,	PUNCT
ispiv-39	207	16	illustrated	illustrate	VERB
ispiv-39	207	17	in	in	ADP
ispiv-39	207	18	fig	fig	NOUN
ispiv-39	207	19	.	.	PUNCT
ispiv-39	208	1	10	10	NUM
ispiv-39	208	2	(	(	PUNCT
ispiv-39	208	3	a	a	NOUN
ispiv-39	208	4	)	)	PUNCT
ispiv-39	208	5	,	,	PUNCT
ispiv-39	208	6	the	the	DET
ispiv-39	208	7	previous	previous	ADJ
ispiv-39	208	8	circular	circular	ADV
ispiv-39	208	9	-	-	PUNCT
ispiv-39	208	10	shaped	shape	VERB
ispiv-39	208	11	velocity	velocity	NOUN
ispiv-39	208	12	field	field	NOUN
ispiv-39	208	13	behind	behind	ADP
ispiv-39	208	14	the	the	DET
ispiv-39	208	15	single	single	ADJ
ispiv-39	208	16	rotor	rotor	NOUN
ispiv-39	208	17	was	be	AUX
ispiv-39	208	18	transformed	transform	VERB
ispiv-39	208	19	into	into	ADP
ispiv-39	208	20	a	a	DET
ispiv-39	208	21	‘	'	PUNCT
ispiv-39	208	22	horseshoe	horseshoe	ADJ
ispiv-39	208	23	’	'	PUNCT
ispiv-39	208	24	shape	shape	NOUN
ispiv-39	208	25	.	.	PUNCT
ispiv-39	209	1	not	not	PART
ispiv-39	209	2	only	only	ADV
ispiv-39	209	3	that	that	PRON
ispiv-39	209	4	but	but	CCONJ
ispiv-39	209	5	also	also	ADV
ispiv-39	209	6	the	the	DET
ispiv-39	209	7	orientation	orientation	NOUN
ispiv-39	209	8	of	of	ADP
ispiv-39	209	9	the	the	DET
ispiv-39	209	10	velocity	velocity	NOUN
ispiv-39	209	11	contour	contour	NOUN
ispiv-39	209	12	was	be	AUX
ispiv-39	209	13	found	find	VERB
ispiv-39	209	14	to	to	PART
ispiv-39	209	15	rotate	rotate	VERB
ispiv-39	209	16	by	by	ADP
ispiv-39	209	17	~35	~35	NOUN
ispiv-39	209	18	°	°	NOUN
ispiv-39	209	19	from	from	ADP
ispiv-39	209	20	its	its	PRON
ispiv-39	209	21	original	original	ADJ
ispiv-39	209	22	position	position	NOUN
ispiv-39	209	23	(	(	PUNCT
ispiv-39	209	24	i.e.	i.e.	X
ispiv-39	209	25	,	,	PUNCT
ispiv-39	209	26	in	in	ADP
ispiv-39	209	27	x	x	PROPN
ispiv-39	209	28	/	/	SYM
ispiv-39	209	29	d	d	NOUN
ispiv-39	209	30	=	=	SYM
ispiv-39	209	31	0.1	0.1	NUM
ispiv-39	209	32	plane	plane	NOUN
ispiv-39	209	33	)	)	PUNCT
ispiv-39	209	34	.	.	PUNCT
ispiv-39	210	1	due	due	ADP
ispiv-39	210	2	to	to	ADP
ispiv-39	210	3	the	the	DET
ispiv-39	210	4	flow	flow	NOUN
ispiv-39	210	5	inertia	inertia	NOUN
ispiv-39	210	6	,	,	PUNCT
ispiv-39	210	7	the	the	DET
ispiv-39	210	8	air	air	NOUN
ispiv-39	210	9	stream	stream	NOUN
ispiv-39	210	10	would	would	AUX
ispiv-39	210	11	continue	continue	VERB
ispiv-39	210	12	rotating	rotate	VERB
ispiv-39	210	13	after	after	ADP
ispiv-39	210	14	being	be	AUX
ispiv-39	210	15	accelerated	accelerate	VERB
ispiv-39	210	16	by	by	ADP
ispiv-39	210	17	the	the	DET
ispiv-39	210	18	blade	blade	NOUN
ispiv-39	210	19	as	as	SCONJ
ispiv-39	210	20	it	it	PRON
ispiv-39	210	21	traveled	travel	VERB
ispiv-39	210	22	further	far	ADV
ispiv-39	210	23	downstream	downstream	ADV
ispiv-39	210	24	.	.	PUNCT
ispiv-39	211	1	though	though	SCONJ
ispiv-39	211	2	a	a	DET
ispiv-39	211	3	similar	similar	ADJ
ispiv-39	211	4	deviation	deviation	NOUN
ispiv-39	211	5	angle	angle	NOUN
ispiv-39	211	6	was	be	AUX
ispiv-39	211	7	observed	observe	VERB
ispiv-39	211	8	for	for	ADP
ispiv-39	211	9	the	the	DET
ispiv-39	211	10	twin	twin	ADJ
ispiv-39	211	11	-	-	PUNCT
ispiv-39	211	12	rotor	rotor	NOUN
ispiv-39	211	13	case	case	NOUN
ispiv-39	211	14	,	,	PUNCT
ispiv-39	211	15	the	the	DET
ispiv-39	211	16	velocity	velocity	NOUN
ispiv-39	211	17	contour	contour	NOUN
ispiv-39	211	18	was	be	AUX
ispiv-39	211	19	found	find	VERB
ispiv-39	211	20	to	to	PART
ispiv-39	211	21	bend	bend	VERB
ispiv-39	211	22	slightly	slightly	ADV
ispiv-39	211	23	toward	toward	ADP
ispiv-39	211	24	the	the	DET
ispiv-39	211	25	adjacent	adjacent	ADJ
ispiv-39	211	26	rotor	rotor	NOUN
ispiv-39	211	27	in	in	ADP
ispiv-39	211	28	comparison	comparison	NOUN
ispiv-39	211	29	with	with	ADP
ispiv-39	211	30	that	that	PRON
ispiv-39	211	31	of	of	ADP
ispiv-39	211	32	the	the	DET
ispiv-39	211	33	baseline	baseline	NOUN
ispiv-39	211	34	,	,	PUNCT
ispiv-39	211	35	especially	especially	ADV
ispiv-39	211	36	for	for	ADP
ispiv-39	211	37	the	the	DET
ispiv-39	211	38	region	region	NOUN
ispiv-39	211	39	close	close	ADJ
ispiv-39	211	40	to	to	ADP
ispiv-39	211	41	the	the	DET
ispiv-39	211	42	flow	flow	NOUN
ispiv-39	211	43	separation	separation	NOUN
ispiv-39	211	44	region	region	NOUN
ispiv-39	211	45	(	(	PUNCT
ispiv-39	211	46	i.e.	i.e.	X
ispiv-39	211	47	,	,	PUNCT
ispiv-39	211	48	region	region	NOUN
ispiv-39	211	49	in	in	ADP
ispiv-39	211	50	black	black	ADJ
ispiv-39	211	51	dash	dash	NOUN
ispiv-39	211	52	line	line	NOUN
ispiv-39	211	53	)	)	PUNCT
ispiv-39	211	54	.	.	PUNCT
ispiv-39	212	1	this	this	DET
ispiv-39	212	2	phenomenon	phenomenon	NOUN
ispiv-39	212	3	is	be	AUX
ispiv-39	212	4	believed	believe	VERB
ispiv-39	212	5	to	to	PART
ispiv-39	212	6	be	be	AUX
ispiv-39	212	7	closely	closely	ADV
ispiv-39	212	8	related	relate	VERB
ispiv-39	212	9	to	to	ADP
ispiv-39	212	10	the	the	DET
ispiv-39	212	11	aforementioned	aforementioned	ADJ
ispiv-39	212	12	coanda	coanda	NOUN
ispiv-39	212	13	effect	effect	NOUN
ispiv-39	212	14	(	(	PUNCT
ispiv-39	212	15	i.e.	i.e.	X
ispiv-39	212	16	,	,	PUNCT
ispiv-39	212	17	fig	fig	NOUN
ispiv-39	212	18	.	.	NOUN
ispiv-39	213	1	6	6	NUM
ispiv-39	213	2	)	)	PUNCT
ispiv-39	213	3	where	where	SCONJ
ispiv-39	213	4	the	the	DET
ispiv-39	213	5	induced	induced	ADJ
ispiv-39	213	6	airflow	airflow	NOUN
ispiv-39	213	7	behind	behind	ADP
ispiv-39	213	8	the	the	DET
ispiv-39	213	9	twin	twin	ADJ
ispiv-39	213	10	rotors	rotor	NOUN
ispiv-39	213	11	would	would	AUX
ispiv-39	213	12	be	be	AUX
ispiv-39	213	13	attracted	attract	VERB
ispiv-39	213	14	and	and	CCONJ
ispiv-39	213	15	bent	bend	VERB
ispiv-39	213	16	toward	toward	ADP
ispiv-39	213	17	the	the	DET
ispiv-39	213	18	nearby	nearby	ADJ
ispiv-39	213	19	rotor	rotor	NOUN
ispiv-39	213	20	.	.	PUNCT
ispiv-39	214	1	fig	fig	NOUN
ispiv-39	214	2	.	.	PUNCT
ispiv-39	215	1	9	9	NUM
ispiv-39	215	2	(	(	PUNCT
ispiv-39	215	3	b	b	NOUN
ispiv-39	215	4	)	)	PUNCT
ispiv-39	215	5	shows	show	VERB
ispiv-39	215	6	the	the	DET
ispiv-39	215	7	measured	measure	VERB
ispiv-39	215	8	normalized	normalize	VERB
ispiv-39	215	9	tke	tke	NOUN
ispiv-39	215	10	distributions	distribution	NOUN
ispiv-39	215	11	(	(	PUNCT
ispiv-39	215	12	(	(	PUNCT
ispiv-39	215	13	)	)	SYM
ispiv-39	215	14	2	2	NUM
ispiv-39	215	15	2	2	NUM
ispiv-39	215	16	2	2	NUM
ispiv-39	215	17	'	'	PUNCT
ispiv-39	215	18	'	'	PUNCT
ispiv-39	215	19	'	'	PUNCT
ispiv-39	215	20	20.5	20.5	NUM
ispiv-39	215	21	/	/	SYM
ispiv-39	215	22	tipu	tipu	PROPN
ispiv-39	215	23	v	v	PROPN
ispiv-39	215	24	w	w	NOUN
ispiv-39	215	25	u+	u+	NUM
ispiv-39	215	26	+	+	CCONJ
ispiv-39	215	27	)	)	PUNCT
ispiv-39	215	28	for	for	ADP
ispiv-39	215	29	the	the	DET
ispiv-39	215	30	single	single	ADJ
ispiv-39	215	31	rotor	rotor	NOUN
ispiv-39	215	32	case	case	NOUN
ispiv-39	215	33	in	in	ADP
ispiv-39	215	34	comparison	comparison	NOUN
ispiv-39	215	35	with	with	ADP
ispiv-39	215	36	that	that	PRON
ispiv-39	215	37	of	of	ADP
ispiv-39	215	38	the	the	DET
ispiv-39	215	39	twin	twin	ADJ
ispiv-39	215	40	-	-	PUNCT
ispiv-39	215	41	rotor	rotor	NOUN
ispiv-39	215	42	case	case	NOUN
ispiv-39	215	43	in	in	ADP
ispiv-39	215	44	the	the	DET
ispiv-39	215	45	x	x	PROPN
ispiv-39	215	46	/	/	SYM
ispiv-39	215	47	d	d	NOUN
ispiv-39	215	48	=	=	SYM
ispiv-39	215	49	0.1	0.1	NUM
ispiv-39	215	50	plane	plane	NOUN
ispiv-39	215	51	.	.	PUNCT
ispiv-39	216	1	clearly	clearly	ADV
ispiv-39	216	2	,	,	PUNCT
ispiv-39	216	3	an	an	DET
ispiv-39	216	4	o	o	NOUN
ispiv-39	216	5	-	-	NOUN
ispiv-39	216	6	ring	ring	ADJ
ispiv-39	216	7	shaped	shape	VERB
ispiv-39	216	8	tke	tke	NOUN
ispiv-39	216	9	distribution	distribution	NOUN
ispiv-39	216	10	was	be	AUX
ispiv-39	216	11	found	find	VERB
ispiv-39	216	12	to	to	PART
ispiv-39	216	13	be	be	AUX
ispiv-39	216	14	the	the	DET
ispiv-39	216	15	dominant	dominant	ADJ
ispiv-39	216	16	feature	feature	NOUN
ispiv-39	216	17	for	for	ADP
ispiv-39	216	18	the	the	DET
ispiv-39	216	19	single	single	ADJ
ispiv-39	216	20	rotor	rotor	NOUN
ispiv-39	216	21	case	case	NOUN
ispiv-39	216	22	,	,	PUNCT
ispiv-39	216	23	which	which	PRON
ispiv-39	216	24	is	be	AUX
ispiv-39	216	25	because	because	SCONJ
ispiv-39	216	26	of	of	ADP
ispiv-39	216	27	the	the	DET
ispiv-39	216	28	periodic	periodic	ADJ
ispiv-39	216	29	vortex	vortex	NOUN
ispiv-39	216	30	shedding	shed	VERB
ispiv-39	216	31	from	from	ADP
ispiv-39	216	32	the	the	DET
ispiv-39	216	33	rotor	rotor	NOUN
ispiv-39	216	34	tip	tip	NOUN
ispiv-39	216	35	.	.	PUNCT
ispiv-39	217	1	the	the	DET
ispiv-39	217	2	measured	measure	VERB
ispiv-39	217	3	results	result	NOUN
ispiv-39	217	4	are	be	AUX
ispiv-39	217	5	in	in	ADP
ispiv-39	217	6	accordance	accordance	NOUN
ispiv-39	217	7	with	with	ADP
ispiv-39	217	8	the	the	DET
ispiv-39	217	9	measured	measure	VERB
ispiv-39	217	10	planar	planar	ADJ
ispiv-39	217	11	piv	piv	NOUN
ispiv-39	217	12	results	result	NOUN
ispiv-39	217	13	shown	show	VERB
ispiv-39	217	14	in	in	ADP
ispiv-39	217	15	fig	fig	NOUN
ispiv-39	217	16	.	.	PUNCT
ispiv-39	218	1	6	6	NUM
ispiv-39	218	2	.	.	PUNCT
ispiv-39	218	3	though	though	SCONJ
ispiv-39	218	4	the	the	DET
ispiv-39	218	5	general	general	ADJ
ispiv-39	218	6	pattern	pattern	NOUN
ispiv-39	218	7	was	be	AUX
ispiv-39	218	8	found	find	VERB
ispiv-39	218	9	to	to	PART
ispiv-39	218	10	be	be	AUX
ispiv-39	218	11	similar	similar	ADJ
ispiv-39	218	12	for	for	ADP
ispiv-39	218	13	both	both	DET
ispiv-39	218	14	cases	case	NOUN
ispiv-39	218	15	,	,	PUNCT
ispiv-39	218	16	except	except	SCONJ
ispiv-39	218	17	a	a	DET
ispiv-39	218	18	region	region	NOUN
ispiv-39	218	19	with	with	ADP
ispiv-39	218	20	significantly	significantly	ADV
ispiv-39	218	21	high	high	ADJ
ispiv-39	218	22	tke	tke	PROPN
ispiv-39	218	23	levels	level	NOUN
ispiv-39	218	24	was	be	AUX
ispiv-39	218	25	observed	observe	VERB
ispiv-39	218	26	at	at	ADP
ispiv-39	218	27	the	the	DET
ispiv-39	218	28	top	top	ADJ
ispiv-39	218	29	-	-	PUNCT
ispiv-39	218	30	right	right	ADJ
ispiv-39	218	31	corner	corner	NOUN
ispiv-39	218	32	for	for	ADP
ispiv-39	218	33	the	the	DET
ispiv-39	218	34	twin	twin	ADJ
ispiv-39	218	35	-	-	PUNCT
ispiv-39	218	36	rotor	rotor	NOUN
ispiv-39	218	37	case	case	NOUN
ispiv-39	218	38	.	.	PUNCT
ispiv-39	219	1	as	as	SCONJ
ispiv-39	219	2	expected	expect	VERB
ispiv-39	219	3	,	,	PUNCT
ispiv-39	219	4	flow	flow	NOUN
ispiv-39	219	5	separation	separation	NOUN
ispiv-39	219	6	would	would	AUX
ispiv-39	219	7	lead	lead	VERB
ispiv-39	219	8	to	to	ADP
ispiv-39	219	9	greatly	greatly	ADV
ispiv-39	219	10	enhanced	enhance	VERB
ispiv-39	219	11	turbulence	turbulence	NOUN
ispiv-39	219	12	fluctuations	fluctuation	NOUN
ispiv-39	219	13	(	(	PUNCT
ispiv-39	219	14	i.e.	i.e.	X
ispiv-39	219	15	,	,	PUNCT
ispiv-39	219	16	tke	tke	PROPN
ispiv-39	219	17	)	)	PUNCT
ispiv-39	219	18	,	,	PUNCT
ispiv-39	219	19	which	which	PRON
ispiv-39	219	20	consequently	consequently	ADV
ispiv-39	219	21	resulted	result	VERB
ispiv-39	219	22	in	in	ADP
ispiv-39	219	23	dramatically	dramatically	ADV
ispiv-39	219	24	intensified	intensify	VERB
ispiv-39	219	25	thrust	thrust	VERB
ispiv-39	219	26	fluctuations	fluctuation	NOUN
ispiv-39	219	27	for	for	ADP
ispiv-39	219	28	the	the	DET
ispiv-39	219	29	twin	twin	ADJ
ispiv-39	219	30	-	-	PUNCT
ispiv-39	219	31	rotor	rotor	NOUN
ispiv-39	219	32	case	case	NOUN
ispiv-39	219	33	as	as	SCONJ
ispiv-39	219	34	mentioned	mention	VERB
ispiv-39	219	35	in	in	ADP
ispiv-39	219	36	fig	fig	NOUN
ispiv-39	219	37	.	.	PUNCT
ispiv-39	220	1	3	3	NUM
ispiv-39	220	2	(	(	PUNCT
ispiv-39	220	3	b	b	NOUN
ispiv-39	220	4	)	)	PUNCT
ispiv-39	220	5	.	.	PUNCT
ispiv-39	221	1	this	this	PRON
ispiv-39	221	2	also	also	ADV
ispiv-39	221	3	confirmed	confirm	VERB
ispiv-39	221	4	the	the	DET
ispiv-39	221	5	conjecture	conjecture	NOUN
ispiv-39	221	6	that	that	SCONJ
ispiv-39	221	7	the	the	DET
ispiv-39	221	8	enhanced	enhanced	ADJ
ispiv-39	221	9	broadband	broadband	NOUN
ispiv-39	221	10	noise	noise	NOUN
ispiv-39	221	11	shown	show	VERB
ispiv-39	221	12	in	in	ADP
ispiv-39	221	13	fig	fig	NOUN
ispiv-39	221	14	.	.	PUNCT
ispiv-39	221	15	5	5	NUM
ispiv-39	221	16	was	be	AUX
ispiv-39	221	17	caused	cause	VERB
ispiv-39	221	18	by	by	ADP
ispiv-39	221	19	the	the	DET
ispiv-39	221	20	augmented	augment	VERB
ispiv-39	221	21	tke	tke	NOUN
ispiv-39	221	22	level	level	NOUN
ispiv-39	221	23	.	.	PUNCT
ispiv-39	222	1	imagine	imagine	VERB
ispiv-39	222	2	that	that	SCONJ
ispiv-39	222	3	as	as	SCONJ
ispiv-39	222	4	the	the	DET
ispiv-39	222	5	blade	blade	NOUN
ispiv-39	222	6	struck	strike	VERB
ispiv-39	222	7	through	through	ADP
ispiv-39	222	8	the	the	DET
ispiv-39	222	9	separation	separation	NOUN
ispiv-39	222	10	region	region	NOUN
ispiv-39	222	11	,	,	PUNCT
ispiv-39	222	12	it	it	PRON
ispiv-39	222	13	would	would	AUX
ispiv-39	222	14	certainly	certainly	ADV
ispiv-39	222	15	suffer	suffer	VERB
ispiv-39	222	16	strong	strong	ADJ
ispiv-39	222	17	fluctuations	fluctuation	NOUN
ispiv-39	222	18	,	,	PUNCT
ispiv-39	222	19	leading	lead	VERB
ispiv-39	222	20	to	to	ADP
ispiv-39	222	21	augmented	augment	VERB
ispiv-39	222	22	tke	tke	PROPN
ispiv-39	222	23	and	and	CCONJ
ispiv-39	222	24	broadband	broadband	NOUN
ispiv-39	222	25	noise	noise	NOUN
ispiv-39	222	26	.	.	PUNCT
ispiv-39	223	1	due	due	ADP
ispiv-39	223	2	to	to	ADP
ispiv-39	223	3	the	the	DET
ispiv-39	223	4	viscous	viscous	ADJ
ispiv-39	223	5	dissipation	dissipation	NOUN
ispiv-39	223	6	within	within	ADP
ispiv-39	223	7	the	the	DET
ispiv-39	223	8	shear	shear	NOUN
ispiv-39	223	9	layer	layer	NOUN
ispiv-39	223	10	,	,	PUNCT
ispiv-39	223	11	the	the	DET
ispiv-39	223	12	measured	measure	VERB
ispiv-39	223	13	tke	tke	NOUN
ispiv-39	223	14	levels	level	NOUN
ispiv-39	223	15	for	for	ADP
ispiv-39	223	16	both	both	DET
ispiv-39	223	17	cases	case	NOUN
ispiv-39	223	18	were	be	AUX
ispiv-39	223	19	found	find	VERB
ispiv-39	223	20	to	to	PART
ispiv-39	223	21	decrease	decrease	VERB
ispiv-39	223	22	rapidly	rapidly	ADV
ispiv-39	223	23	and	and	CCONJ
ispiv-39	223	24	reach	reach	VERB
ispiv-39	223	25	a	a	DET
ispiv-39	223	26	similar	similar	ADJ
ispiv-39	223	27	level	level	NOUN
ispiv-39	223	28	at	at	ADP
ispiv-39	223	29	the	the	DET
ispiv-39	223	30	location	location	NOUN
ispiv-39	223	31	of	of	ADP
ispiv-39	223	32	x	x	PROPN
ispiv-39	223	33	/	/	SYM
ispiv-39	223	34	d	d	X
ispiv-39	223	35	=	=	SYM
ispiv-39	223	36	1.0	1.0	NUM
ispiv-39	223	37	(	(	PUNCT
ispiv-39	223	38	i.e.	i.e.	X
ispiv-39	223	39	,	,	PUNCT
ispiv-39	223	40	shown	show	VERB
ispiv-39	223	41	in	in	ADP
ispiv-39	223	42	fig	fig	NOUN
ispiv-39	223	43	.	.	PUNCT
ispiv-39	224	1	10	10	NUM
ispiv-39	224	2	(	(	PUNCT
ispiv-39	224	3	b	b	NOUN
ispiv-39	224	4	)	)	PUNCT
ispiv-39	224	5	)	)	PUNCT
ispiv-39	224	6	.	.	PUNCT
ispiv-39	225	1	therefore	therefore	ADV
ispiv-39	225	2	,	,	PUNCT
ispiv-39	225	3	high	high	ADJ
ispiv-39	225	4	tke	tke	NOUN
ispiv-39	225	5	zone	zone	NOUN
ispiv-39	225	6	could	could	AUX
ispiv-39	225	7	only	only	ADV
ispiv-39	225	8	exist	exist	VERB
ispiv-39	225	9	in	in	ADP
ispiv-39	225	10	the	the	DET
ispiv-39	225	11	near	near	ADJ
ispiv-39	225	12	-	-	PUNCT
ispiv-39	225	13	blade	blade	NOUN
ispiv-39	225	14	region	region	NOUN
ispiv-39	225	15	since	since	SCONJ
ispiv-39	225	16	it	it	PRON
ispiv-39	225	17	dissipates	dissipate	VERB
ispiv-39	225	18	rapidly	rapidly	ADV
ispiv-39	225	19	as	as	SCONJ
ispiv-39	225	20	induced	induced	ADJ
ispiv-39	225	21	flow	flow	NOUN
ispiv-39	225	22	propagated	propagate	VERB
ispiv-39	225	23	downstream	downstream	ADJ
ispiv-39	225	24	.	.	PUNCT
ispiv-39	226	1	figure	figure	NOUN
ispiv-39	226	2	11	11	NUM
ispiv-39	226	3	shows	show	VERB
ispiv-39	226	4	the	the	DET
ispiv-39	226	5	evolution	evolution	NOUN
ispiv-39	226	6	of	of	ADP
ispiv-39	226	7	the	the	DET
ispiv-39	226	8	ensemble	ensemble	ADV
ispiv-39	226	9	-	-	PUNCT
ispiv-39	226	10	averaged	average	VERB
ispiv-39	226	11	streamwise	streamwise	NOUN
ispiv-39	226	12	velocity	velocity	NOUN
ispiv-39	226	13	and	and	CCONJ
ispiv-39	226	14	the	the	DET
ispiv-39	226	15	normalized	normalize	VERB
ispiv-39	226	16	tke	tke	NOUN
ispiv-39	226	17	distributions	distribution	NOUN
ispiv-39	226	18	for	for	ADP
ispiv-39	226	19	the	the	DET
ispiv-39	226	20	single	single	ADJ
ispiv-39	226	21	and	and	CCONJ
ispiv-39	226	22	twin	twin	ADJ
ispiv-39	226	23	-	-	PUNCT
ispiv-39	226	24	rotor	rotor	NOUN
ispiv-39	226	25	cases	case	NOUN
ispiv-39	226	26	at	at	ADP
ispiv-39	226	27	three	three	NUM
ispiv-39	226	28	typical	typical	ADJ
ispiv-39	226	29	streamwise	streamwise	NOUN
ispiv-39	226	30	locations	location	NOUN
ispiv-39	226	31	(	(	PUNCT
ispiv-39	226	32	i.e.	i.e.	X
ispiv-39	226	33	,	,	PUNCT
ispiv-39	226	34	x	x	X
ispiv-39	226	35	/	/	SYM
ispiv-39	226	36	d	d	NOUN
ispiv-39	226	37	=	=	SYM
ispiv-39	226	38	0.1	0.1	NUM
ispiv-39	226	39	,	,	PUNCT
ispiv-39	226	40	0.5	0.5	NUM
ispiv-39	226	41	,	,	PUNCT
ispiv-39	226	42	and	and	CCONJ
ispiv-39	226	43	1.0	1.0	NUM
ispiv-39	226	44	)	)	PUNCT
ispiv-39	226	45	.	.	PUNCT
ispiv-39	227	1	as	as	SCONJ
ispiv-39	227	2	shown	show	VERB
ispiv-39	227	3	clearly	clearly	ADV
ispiv-39	227	4	in	in	ADP
ispiv-39	227	5	the	the	DET
ispiv-39	227	6	figure	figure	NOUN
ispiv-39	227	7	,	,	PUNCT
ispiv-39	227	8	the	the	DET
ispiv-39	227	9	mean	mean	ADJ
ispiv-39	227	10	velocity	velocity	NOUN
ispiv-39	227	11	fields	field	NOUN
ispiv-39	227	12	for	for	ADP
ispiv-39	227	13	both	both	DET
ispiv-39	227	14	cases	case	NOUN
ispiv-39	227	15	were	be	AUX
ispiv-39	227	16	found	find	VERB
ispiv-39	227	17	to	to	PART
ispiv-39	227	18	become	become	VERB
ispiv-39	227	19	more	more	ADV
ispiv-39	227	20	uniform	uniform	ADJ
ispiv-39	227	21	as	as	SCONJ
ispiv-39	227	22	induced	induce	VERB
ispiv-39	227	23	flow	flow	NOUN
ispiv-39	227	24	convected	convect	VERB
ispiv-39	227	25	downstream	downstream	NOUN
ispiv-39	227	26	.	.	PUNCT
ispiv-39	228	1	in	in	ADP
ispiv-39	228	2	addition	addition	NOUN
ispiv-39	228	3	,	,	PUNCT
ispiv-39	228	4	the	the	DET
ispiv-39	228	5	orientation	orientation	NOUN
ispiv-39	228	6	of	of	ADP
ispiv-39	228	7	the	the	DET
ispiv-39	228	8	induced	induce	VERB
ispiv-39	228	9	flows	flow	NOUN
ispiv-39	228	10	was	be	AUX
ispiv-39	228	11	found	find	VERB
ispiv-39	228	12	to	to	PART
ispiv-39	228	13	rotate	rotate	VERB
ispiv-39	228	14	by	by	ADP
ispiv-39	228	15	approximately	approximately	ADV
ispiv-39	228	16	35	35	NUM
ispiv-39	228	17	°	°	NOUN
ispiv-39	228	18	(	(	PUNCT
ispiv-39	228	19	i.e.	i.e.	X
ispiv-39	228	20	,	,	PUNCT
ispiv-39	228	21	in	in	ADP
ispiv-39	228	22	the	the	DET
ispiv-39	228	23	plane	plane	NOUN
ispiv-39	228	24	of	of	ADP
ispiv-39	228	25	x	x	PROPN
ispiv-39	228	26	/	/	SYM
ispiv-39	228	27	d	d	NOUN
ispiv-39	228	28	=	=	SYM
ispiv-39	228	29	0.1	0.1	NUM
ispiv-39	228	30	)	)	PUNCT
ispiv-39	228	31	in	in	ADP
ispiv-39	228	32	comparison	comparison	NOUN
ispiv-39	228	33	with	with	ADP
ispiv-39	228	34	its	its	PRON
ispiv-39	228	35	original	original	ADJ
ispiv-39	228	36	vertical	vertical	ADJ
ispiv-39	228	37	position	position	NOUN
ispiv-39	228	38	(	(	PUNCT
ispiv-39	228	39	i.e.	i.e.	X
ispiv-39	228	40	,	,	PUNCT
ispiv-39	228	41	in	in	ADP
ispiv-39	228	42	the	the	DET
ispiv-39	228	43	plane	plane	NOUN
ispiv-39	228	44	of	of	ADP
ispiv-39	228	45	x	x	PROPN
ispiv-39	228	46	/	/	SYM
ispiv-39	228	47	d	d	X
ispiv-39	228	48	=	=	SYM
ispiv-39	228	49	1.0	1.0	NUM
ispiv-39	228	50	)	)	PUNCT
ispiv-39	228	51	.	.	PUNCT
ispiv-39	229	1	as	as	ADP
ispiv-39	229	2	for	for	ADP
ispiv-39	229	3	the	the	DET
ispiv-39	229	4	normalized	normalize	VERB
ispiv-39	229	5	tke	tke	NOUN
ispiv-39	229	6	distributions	distribution	NOUN
ispiv-39	229	7	given	give	VERB
ispiv-39	229	8	in	in	ADP
ispiv-39	229	9	fig	fig	NOUN
ispiv-39	229	10	.	.	PUNCT
ispiv-39	230	1	11	11	NUM
ispiv-39	230	2	(	(	PUNCT
ispiv-39	230	3	b	b	NOUN
ispiv-39	230	4	)	)	PUNCT
ispiv-39	230	5	,	,	PUNCT
ispiv-39	230	6	a	a	DET
ispiv-39	230	7	significantly	significantly	ADV
ispiv-39	230	8	higher	high	ADJ
ispiv-39	230	9	tke	tke	NOUN
ispiv-39	230	10	level	level	NOUN
ispiv-39	230	11	was	be	AUX
ispiv-39	230	12	initially	initially	ADV
ispiv-39	230	13	observed	observe	VERB
ispiv-39	230	14	at	at	ADP
ispiv-39	230	15	the	the	DET
ispiv-39	230	16	top	top	ADJ
ispiv-39	230	17	-	-	PUNCT
ispiv-39	230	18	right	right	NOUN
ispiv-39	230	19	region	region	NOUN
ispiv-39	230	20	of	of	ADP
ispiv-39	230	21	twin	twin	ADJ
ispiv-39	230	22	-	-	PUNCT
ispiv-39	230	23	rotor	rotor	NOUN
ispiv-39	230	24	case	case	NOUN
ispiv-39	230	25	in	in	ADP
ispiv-39	230	26	x	x	PROPN
ispiv-39	230	27	/	/	SYM
ispiv-39	230	28	d	d	NOUN
ispiv-39	230	29	=	=	SYM
ispiv-39	230	30	0.1	0.1	NUM
ispiv-39	230	31	plane	plane	NOUN
ispiv-39	230	32	,	,	PUNCT
ispiv-39	230	33	but	but	CCONJ
ispiv-39	230	34	it	it	PRON
ispiv-39	230	35	then	then	ADV
ispiv-39	230	36	decreased	decrease	VERB
ispiv-39	230	37	rapidly	rapidly	ADV
ispiv-39	230	38	and	and	CCONJ
ispiv-39	230	39	reached	reach	VERB
ispiv-39	230	40	a	a	DET
ispiv-39	230	41	similar	similar	ADJ
ispiv-39	230	42	level	level	NOUN
ispiv-39	230	43	with	with	ADP
ispiv-39	230	44	that	that	PRON
ispiv-39	230	45	of	of	ADP
ispiv-39	230	46	the	the	DET
ispiv-39	230	47	single	single	ADJ
ispiv-39	230	48	rotor	rotor	NOUN
ispiv-39	230	49	due	due	ADP
ispiv-39	230	50	to	to	ADP
ispiv-39	230	51	the	the	DET
ispiv-39	230	52	viscous	viscous	ADJ
ispiv-39	230	53	dissipation	dissipation	NOUN
ispiv-39	230	54	within	within	ADP
ispiv-39	230	55	the	the	DET
ispiv-39	230	56	shear	shear	NOUN
ispiv-39	230	57	layer	layer	NOUN
ispiv-39	230	58	.	.	PUNCT
ispiv-39	231	1	based	base	VERB
ispiv-39	231	2	on	on	ADP
ispiv-39	231	3	above	above	ADP
ispiv-39	231	4	measured	measured	ADJ
ispiv-39	231	5	results	result	NOUN
ispiv-39	231	6	,	,	PUNCT
ispiv-39	231	7	the	the	DET
ispiv-39	231	8	twin	twin	ADJ
ispiv-39	231	9	-	-	PUNCT
ispiv-39	231	10	rotor	rotor	NOUN
ispiv-39	231	11	case	case	NOUN
ispiv-39	231	12	with	with	ADP
ispiv-39	231	13	l	l	PROPN
ispiv-39	231	14	/	/	SYM
ispiv-39	231	15	d	d	NOUN
ispiv-39	231	16	=	=	SYM
ispiv-39	231	17	0.05	0.05	NUM
ispiv-39	231	18	experienced	experience	VERB
ispiv-39	231	19	the	the	DET
ispiv-39	231	20	strongest	strong	ADJ
ispiv-39	231	21	flow	flow	NOUN
ispiv-39	231	22	interactions	interaction	NOUN
ispiv-39	231	23	within	within	ADP
ispiv-39	231	24	the	the	DET
ispiv-39	231	25	rotors	rotor	NOUN
ispiv-39	231	26	.	.	PUNCT
ispiv-39	232	1	adding	add	VERB
ispiv-39	232	2	a	a	DET
ispiv-39	232	3	wingtip	wingtip	NOUN
ispiv-39	232	4	,	,	PUNCT
ispiv-39	232	5	rather	rather	ADV
ispiv-39	232	6	than	than	ADP
ispiv-39	232	7	enlarging	enlarge	VERB
ispiv-39	232	8	the	the	DET
ispiv-39	232	9	separation	separation	NOUN
ispiv-39	232	10	distance	distance	NOUN
ispiv-39	232	11	,	,	PUNCT
ispiv-39	232	12	might	might	AUX
ispiv-39	232	13	be	be	AUX
ispiv-39	232	14	a	a	DET
ispiv-39	232	15	practical	practical	ADJ
ispiv-39	232	16	method	method	NOUN
ispiv-39	232	17	to	to	PART
ispiv-39	232	18	alleviate	alleviate	VERB
ispiv-39	232	19	the	the	DET
ispiv-39	232	20	flow	flow	NOUN
ispiv-39	232	21	interaction	interaction	NOUN
ispiv-39	232	22	effects	effect	NOUN
ispiv-39	232	23	if	if	SCONJ
ispiv-39	232	24	uav	uav	PROPN
ispiv-39	232	25	designers	designer	NOUN
ispiv-39	232	26	are	be	AUX
ispiv-39	232	27	n’t	not	PART
ispiv-39	232	28	willing	willing	ADJ
ispiv-39	232	29	to	to	PART
ispiv-39	232	30	sacrifice	sacrifice	VERB
ispiv-39	232	31	the	the	DET
ispiv-39	232	32	compactness	compactness	NOUN
ispiv-39	232	33	of	of	ADP
ispiv-39	232	34	the	the	DET
ispiv-39	232	35	drones	drone	NOUN
ispiv-39	232	36	.	.	PUNCT
ispiv-39	233	1	(	(	PUNCT
ispiv-39	233	2	a	a	X
ispiv-39	233	3	)	)	PUNCT
ispiv-39	233	4	ensemble	ensemble	ADJ
ispiv-39	233	5	-	-	PUNCT
ispiv-39	233	6	averaged	average	VERB
ispiv-39	233	7	velocity	velocity	NOUN
ispiv-39	233	8	field	field	NOUN
ispiv-39	233	9	(	(	PUNCT
ispiv-39	233	10	b	b	NOUN
ispiv-39	233	11	)	)	PUNCT
ispiv-39	233	12	normalized	normalize	VERB
ispiv-39	233	13	tke	tke	NOUN
ispiv-39	233	14	distribution	distribution	NOUN
ispiv-39	233	15	figure	figure	NOUN
ispiv-39	233	16	9	9	NUM
ispiv-39	233	17	.	.	PUNCT
ispiv-39	233	18	measured	measure	VERB
ispiv-39	233	19	spiv	spiv	NOUN
ispiv-39	233	20	results	result	NOUN
ispiv-39	233	21	for	for	ADP
ispiv-39	233	22	the	the	DET
ispiv-39	233	23	single	single	ADJ
ispiv-39	233	24	rotor	rotor	NOUN
ispiv-39	233	25	(	(	PUNCT
ispiv-39	233	26	left	leave	VERB
ispiv-39	233	27	)	)	PUNCT
ispiv-39	233	28	and	and	CCONJ
ispiv-39	233	29	twin	twin	ADJ
ispiv-39	233	30	-	-	PUNCT
ispiv-39	233	31	rotor	rotor	NOUN
ispiv-39	233	32	(	(	PUNCT
ispiv-39	233	33	right	right	ADJ
ispiv-39	233	34	,	,	PUNCT
ispiv-39	233	35	l=0.05d	l=0.05d	ADJ
ispiv-39	233	36	)	)	PUNCT
ispiv-39	233	37	configurations	configuration	NOUN
ispiv-39	233	38	in	in	ADP
ispiv-39	233	39	the	the	DET
ispiv-39	233	40	x	x	NOUN
ispiv-39	233	41	/	/	SYM
ispiv-39	233	42	d	d	NOUN
ispiv-39	233	43	=	=	SYM
ispiv-39	233	44	0.1	0.1	NUM
ispiv-39	233	45	cross	cross	NOUN
ispiv-39	233	46	plane	plane	NOUN
ispiv-39	233	47	.	.	PUNCT
ispiv-39	234	1	(	(	PUNCT
ispiv-39	234	2	a	a	X
ispiv-39	234	3	)	)	PUNCT
ispiv-39	234	4	(	(	PUNCT
ispiv-39	234	5	a	a	X
ispiv-39	234	6	)	)	PUNCT
ispiv-39	234	7	ensemble	ensemble	ADJ
ispiv-39	234	8	-	-	PUNCT
ispiv-39	234	9	averaged	average	VERB
ispiv-39	234	10	velocity	velocity	NOUN
ispiv-39	234	11	field	field	NOUN
ispiv-39	234	12	(	(	PUNCT
ispiv-39	234	13	b	b	NOUN
ispiv-39	234	14	)	)	PUNCT
ispiv-39	234	15	normalized	normalize	VERB
ispiv-39	234	16	tke	tke	NOUN
ispiv-39	234	17	distribution	distribution	NOUN
ispiv-39	234	18	figure	figure	NOUN
ispiv-39	234	19	10	10	NUM
ispiv-39	234	20	.	.	PUNCT
ispiv-39	235	1	stereoscopic	stereoscopic	ADJ
ispiv-39	235	2	piv	piv	NOUN
ispiv-39	235	3	results	result	VERB
ispiv-39	235	4	for	for	ADP
ispiv-39	235	5	the	the	DET
ispiv-39	235	6	single	single	ADJ
ispiv-39	235	7	rotor	rotor	NOUN
ispiv-39	235	8	(	(	PUNCT
ispiv-39	235	9	left	leave	VERB
ispiv-39	235	10	)	)	PUNCT
ispiv-39	235	11	and	and	CCONJ
ispiv-39	235	12	twin	twin	ADJ
ispiv-39	235	13	-	-	PUNCT
ispiv-39	235	14	rotor	rotor	NOUN
ispiv-39	235	15	(	(	PUNCT
ispiv-39	235	16	right	right	ADJ
ispiv-39	235	17	,	,	PUNCT
ispiv-39	235	18	l=0.05d	l=0.05d	ADJ
ispiv-39	235	19	)	)	PUNCT
ispiv-39	235	20	configurations	configuration	NOUN
ispiv-39	235	21	in	in	ADP
ispiv-39	235	22	the	the	DET
ispiv-39	235	23	x	x	NOUN
ispiv-39	235	24	/	/	SYM
ispiv-39	235	25	d	d	NOUN
ispiv-39	235	26	=	=	SYM
ispiv-39	235	27	1.0	1.0	NUM
ispiv-39	235	28	cross	cross	NOUN
ispiv-39	235	29	plane	plane	NOUN
ispiv-39	235	30	(	(	PUNCT
ispiv-39	235	31	a	a	NOUN
ispiv-39	235	32	)	)	PUNCT
ispiv-39	235	33	ensemble	ensemble	ADJ
ispiv-39	235	34	-	-	PUNCT
ispiv-39	235	35	averaged	average	VERB
ispiv-39	235	36	velocity	velocity	NOUN
ispiv-39	235	37	field	field	NOUN
ispiv-39	235	38	,	,	PUNCT
ispiv-39	235	39	b	b	X
ispiv-39	235	40	)	)	PUNCT
ispiv-39	235	41	normalized	normalize	VERB
ispiv-39	235	42	tke	tke	NOUN
ispiv-39	235	43	distribution	distribution	NOUN
ispiv-39	235	44	.	.	PUNCT
ispiv-39	236	1	figure	figure	NOUN
ispiv-39	236	2	11	11	NUM
ispiv-39	236	3	.	.	PUNCT
ispiv-39	237	1	stereoscopic	stereoscopic	ADJ
ispiv-39	237	2	piv	piv	NOUN
ispiv-39	237	3	results	result	VERB
ispiv-39	237	4	for	for	ADP
ispiv-39	237	5	the	the	DET
ispiv-39	237	6	single	single	ADJ
ispiv-39	237	7	rotor	rotor	NOUN
ispiv-39	237	8	(	(	PUNCT
ispiv-39	237	9	left	leave	VERB
ispiv-39	237	10	)	)	PUNCT
ispiv-39	237	11	and	and	CCONJ
ispiv-39	237	12	twin	twin	ADJ
ispiv-39	237	13	rotors	rotor	NOUN
ispiv-39	237	14	(	(	PUNCT
ispiv-39	237	15	right	right	ADJ
ispiv-39	237	16	,	,	PUNCT
ispiv-39	237	17	l=0.05d	l=0.05d	ADJ
ispiv-39	237	18	)	)	PUNCT
ispiv-39	237	19	configurations	configuration	NOUN
ispiv-39	237	20	at	at	ADP
ispiv-39	237	21	x	x	X
ispiv-39	237	22	/	/	SYM
ispiv-39	237	23	d	d	NOUN
ispiv-39	237	24	=	=	SYM
ispiv-39	237	25	0.1	0.1	NUM
ispiv-39	237	26	,	,	PUNCT
ispiv-39	237	27	0.5	0.5	NUM
ispiv-39	237	28	,	,	PUNCT
ispiv-39	237	29	and	and	CCONJ
ispiv-39	237	30	1.0	1.0	NUM
ispiv-39	237	31	locations	location	NOUN
ispiv-39	237	32	.	.	PUNCT
ispiv-39	238	1	iv	iv	X
ispiv-39	238	2	.	.	PUNCT
ispiv-39	238	3	conclusions	conclusion	NOUN
ispiv-39	238	4	an	an	DET
ispiv-39	238	5	experimental	experimental	ADJ
ispiv-39	238	6	investigation	investigation	NOUN
ispiv-39	238	7	was	be	AUX
ispiv-39	238	8	performed	perform	VERB
ispiv-39	238	9	to	to	PART
ispiv-39	238	10	study	study	VERB
ispiv-39	238	11	rotor	rotor	NOUN
ispiv-39	238	12	-	-	PUNCT
ispiv-39	238	13	to	to	ADP
ispiv-39	238	14	-	-	PUNCT
ispiv-39	238	15	rotor	rotor	NOUN
ispiv-39	238	16	interactions	interaction	NOUN
ispiv-39	238	17	on	on	ADP
ispiv-39	238	18	the	the	DET
ispiv-39	238	19	aerodynamic	aerodynamic	ADJ
ispiv-39	238	20	and	and	CCONJ
ispiv-39	238	21	aeroacoustic	aeroacoustic	ADJ
ispiv-39	238	22	performances	performance	NOUN
ispiv-39	238	23	of	of	ADP
ispiv-39	238	24	small	small	ADJ
ispiv-39	238	25	uavs	uavs	NOUN
ispiv-39	238	26	.	.	PUNCT
ispiv-39	239	1	while	while	SCONJ
ispiv-39	239	2	the	the	DET
ispiv-39	239	3	jr3	jr3	PROPN
ispiv-39	239	4	force	force	NOUN
ispiv-39	239	5	transducer	transducer	NOUN
ispiv-39	239	6	and	and	CCONJ
ispiv-39	239	7	microphone	microphone	NOUN
ispiv-39	239	8	were	be	AUX
ispiv-39	239	9	used	use	VERB
ispiv-39	239	10	to	to	PART
ispiv-39	239	11	quantify	quantify	VERB
ispiv-39	239	12	the	the	DET
ispiv-39	239	13	thrust	thrust	ADJ
ispiv-39	239	14	and	and	CCONJ
ispiv-39	239	15	noise	noise	NOUN
ispiv-39	239	16	levels	level	NOUN
ispiv-39	239	17	of	of	ADP
ispiv-39	239	18	the	the	DET
ispiv-39	239	19	rotors	rotor	NOUN
ispiv-39	239	20	,	,	PUNCT
ispiv-39	239	21	a	a	DET
ispiv-39	239	22	high	high	ADJ
ispiv-39	239	23	-	-	PUNCT
ispiv-39	239	24	resolution	resolution	NOUN
ispiv-39	239	25	particle	particle	NOUN
ispiv-39	239	26	image	image	NOUN
ispiv-39	239	27	velocimetry	velocimetry	NOUN
ispiv-39	239	28	(	(	PUNCT
ispiv-39	239	29	piv	piv	NOUN
ispiv-39	239	30	)	)	PUNCT
ispiv-39	239	31	system	system	NOUN
ispiv-39	239	32	was	be	AUX
ispiv-39	239	33	used	use	VERB
ispiv-39	239	34	to	to	PART
ispiv-39	239	35	conduct	conduct	VERB
ispiv-39	239	36	detailed	detailed	ADJ
ispiv-39	239	37	flow	flow	NOUN
ispiv-39	239	38	field	field	NOUN
ispiv-39	239	39	measurements	measurement	NOUN
ispiv-39	239	40	to	to	PART
ispiv-39	239	41	reveal	reveal	VERB
ispiv-39	239	42	the	the	DET
ispiv-39	239	43	dynamic	dynamic	ADJ
ispiv-39	239	44	interactions	interaction	NOUN
ispiv-39	239	45	between	between	ADP
ispiv-39	239	46	the	the	DET
ispiv-39	239	47	rotors	rotor	NOUN
ispiv-39	239	48	.	.	PUNCT
ispiv-39	240	1	the	the	DET
ispiv-39	240	2	effects	effect	NOUN
ispiv-39	240	3	of	of	ADP
ispiv-39	240	4	separation	separation	NOUN
ispiv-39	240	5	distance	distance	NOUN
ispiv-39	240	6	(	(	PUNCT
ispiv-39	240	7	l	l	NOUN
ispiv-39	240	8	=	=	SYM
ispiv-39	240	9	0.05d	0.05d	PROPN
ispiv-39	240	10	,	,	PUNCT
ispiv-39	240	11	0.1d	0.1d	PROPN
ispiv-39	240	12	,	,	PUNCT
ispiv-39	240	13	0.2d	0.2d	NOUN
ispiv-39	240	14	,	,	PUNCT
ispiv-39	240	15	and	and	CCONJ
ispiv-39	240	16	1.0d	1.0d	NOUN
ispiv-39	240	17	)	)	PUNCT
ispiv-39	240	18	on	on	ADP
ispiv-39	240	19	the	the	DET
ispiv-39	240	20	aerodynamic	aerodynamic	ADJ
ispiv-39	240	21	and	and	CCONJ
ispiv-39	240	22	aeroacoustic	aeroacoustic	ADJ
ispiv-39	240	23	performance	performance	NOUN
ispiv-39	240	24	of	of	ADP
ispiv-39	240	25	uavs	uavs	NOUN
ispiv-39	240	26	were	be	AUX
ispiv-39	240	27	evaluated	evaluate	VERB
ispiv-39	240	28	in	in	ADP
ispiv-39	240	29	detail	detail	NOUN
ispiv-39	240	30	based	base	VERB
ispiv-39	240	31	on	on	ADP
ispiv-39	240	32	the	the	DET
ispiv-39	240	33	quantitative	quantitative	ADJ
ispiv-39	240	34	force	force	NOUN
ispiv-39	240	35	,	,	PUNCT
ispiv-39	240	36	noise	noise	NOUN
ispiv-39	240	37	,	,	PUNCT
ispiv-39	240	38	and	and	CCONJ
ispiv-39	240	39	piv	piv	NOUN
ispiv-39	240	40	measurements	measurement	NOUN
ispiv-39	240	41	.	.	PUNCT
ispiv-39	241	1	it	it	PRON
ispiv-39	241	2	was	be	AUX
ispiv-39	241	3	found	find	VERB
ispiv-39	241	4	that	that	SCONJ
ispiv-39	241	5	,	,	PUNCT
ispiv-39	241	6	while	while	SCONJ
ispiv-39	241	7	the	the	DET
ispiv-39	241	8	separation	separation	NOUN
ispiv-39	241	9	distance	distance	NOUN
ispiv-39	241	10	had	have	VERB
ispiv-39	241	11	a	a	DET
ispiv-39	241	12	negligible	negligible	ADJ
ispiv-39	241	13	effect	effect	NOUN
ispiv-39	241	14	on	on	ADP
ispiv-39	241	15	the	the	DET
ispiv-39	241	16	thrust	thrust	ADJ
ispiv-39	241	17	coefficient	coefficient	NOUN
ispiv-39	241	18	of	of	ADP
ispiv-39	241	19	the	the	DET
ispiv-39	241	20	rotor	rotor	NOUN
ispiv-39	241	21	(	(	PUNCT
ispiv-39	241	22	i.e.	i.e.	X
ispiv-39	241	23	,	,	PUNCT
ispiv-39	241	24	variation	variation	NOUN
ispiv-39	241	25	within	within	ADP
ispiv-39	241	26	2	2	NUM
ispiv-39	241	27	%	%	NOUN
ispiv-39	241	28	for	for	ADP
ispiv-39	241	29	all	all	DET
ispiv-39	241	30	test	test	NOUN
ispiv-39	241	31	cases	case	NOUN
ispiv-39	241	32	)	)	PUNCT
ispiv-39	241	33	,	,	PUNCT
ispiv-39	241	34	the	the	DET
ispiv-39	241	35	thrust	thrust	ADJ
ispiv-39	241	36	fluctuations	fluctuation	NOUN
ispiv-39	241	37	(	(	PUNCT
ispiv-39	241	38	i.e.	i.e.	X
ispiv-39	241	39	,	,	PUNCT
ispiv-39	241	40	thrust	thrust	VERB
ispiv-39	241	41	standard	standard	ADJ
ispiv-39	241	42	deviation	deviation	NOUN
ispiv-39	241	43	)	)	PUNCT
ispiv-39	241	44	were	be	AUX
ispiv-39	241	45	found	find	VERB
ispiv-39	241	46	to	to	PART
ispiv-39	241	47	increase	increase	VERB
ispiv-39	241	48	dramatically	dramatically	ADV
ispiv-39	241	49	as	as	SCONJ
ispiv-39	241	50	the	the	DET
ispiv-39	241	51	separation	separation	NOUN
ispiv-39	241	52	distance	distance	NOUN
ispiv-39	241	53	became	become	VERB
ispiv-39	241	54	smaller	small	ADJ
ispiv-39	241	55	.	.	PUNCT
ispiv-39	242	1	more	more	ADV
ispiv-39	242	2	specifically	specifically	ADV
ispiv-39	242	3	,	,	PUNCT
ispiv-39	242	4	the	the	DET
ispiv-39	242	5	measured	measured	ADJ
ispiv-39	242	6	thrust	thrust	NOUN
ispiv-39	242	7	fluctuations	fluctuation	NOUN
ispiv-39	242	8	for	for	ADP
ispiv-39	242	9	the	the	DET
ispiv-39	242	10	twin	twin	ADJ
ispiv-39	242	11	-	-	PUNCT
ispiv-39	242	12	rotor	rotor	NOUN
ispiv-39	242	13	case	case	NOUN
ispiv-39	242	14	(	(	PUNCT
ispiv-39	242	15	i.e.	i.e.	X
ispiv-39	242	16	,	,	PUNCT
ispiv-39	242	17	l=	l=	ADJ
ispiv-39	242	18	0.05d	0.05d	PROPN
ispiv-39	242	19	)	)	PUNCT
ispiv-39	242	20	were	be	AUX
ispiv-39	242	21	found	find	VERB
ispiv-39	242	22	to	to	PART
ispiv-39	242	23	be	be	AUX
ispiv-39	242	24	~2.4	~2.4	NUM
ispiv-39	242	25	times	time	NOUN
ispiv-39	242	26	larger	large	ADJ
ispiv-39	242	27	than	than	ADP
ispiv-39	242	28	that	that	PRON
ispiv-39	242	29	of	of	ADP
ispiv-39	242	30	the	the	DET
ispiv-39	242	31	baseline	baseline	NOUN
ispiv-39	242	32	case	case	NOUN
ispiv-39	242	33	.	.	PUNCT
ispiv-39	243	1	this	this	PRON
ispiv-39	243	2	is	be	AUX
ispiv-39	243	3	believed	believe	VERB
ispiv-39	243	4	to	to	PART
ispiv-39	243	5	be	be	AUX
ispiv-39	243	6	caused	cause	VERB
ispiv-39	243	7	by	by	ADP
ispiv-39	243	8	the	the	DET
ispiv-39	243	9	complex	complex	ADJ
ispiv-39	243	10	flow	flow	NOUN
ispiv-39	243	11	interactions	interaction	NOUN
ispiv-39	243	12	within	within	ADP
ispiv-39	243	13	rotors	rotor	NOUN
ispiv-39	243	14	as	as	SCONJ
ispiv-39	243	15	revealed	reveal	VERB
ispiv-39	243	16	by	by	ADP
ispiv-39	243	17	the	the	DET
ispiv-39	243	18	detailed	detailed	ADJ
ispiv-39	243	19	piv	piv	NOUN
ispiv-39	243	20	measurements	measurement	NOUN
ispiv-39	243	21	.	.	PUNCT
ispiv-39	244	1	it	it	PRON
ispiv-39	244	2	was	be	AUX
ispiv-39	244	3	also	also	ADV
ispiv-39	244	4	found	find	VERB
ispiv-39	244	5	that	that	SCONJ
ispiv-39	244	6	the	the	DET
ispiv-39	244	7	noise	noise	NOUN
ispiv-39	244	8	distribution	distribution	NOUN
ispiv-39	244	9	for	for	ADP
ispiv-39	244	10	the	the	DET
ispiv-39	244	11	twin	twin	ADJ
ispiv-39	244	12	-	-	PUNCT
ispiv-39	244	13	rotor	rotor	NOUN
ispiv-39	244	14	case	case	NOUN
ispiv-39	244	15	is	be	AUX
ispiv-39	244	16	a	a	DET
ispiv-39	244	17	function	function	NOUN
ispiv-39	244	18	of	of	ADP
ispiv-39	244	19	both	both	DET
ispiv-39	244	20	azimuthal	azimuthal	ADJ
ispiv-39	244	21	angle	angle	NOUN
ispiv-39	244	22	and	and	CCONJ
ispiv-39	244	23	separation	separation	NOUN
ispiv-39	244	24	distance	distance	NOUN
ispiv-39	244	25	,	,	PUNCT
ispiv-39	244	26	where	where	SCONJ
ispiv-39	244	27	the	the	DET
ispiv-39	244	28	measured	measured	ADJ
ispiv-39	244	29	noise	noise	NOUN
ispiv-39	244	30	was	be	AUX
ispiv-39	244	31	found	find	VERB
ispiv-39	244	32	to	to	PART
ispiv-39	244	33	increase	increase	VERB
ispiv-39	244	34	as	as	SCONJ
ispiv-39	244	35	the	the	DET
ispiv-39	244	36	azimuthal	azimuthal	ADJ
ispiv-39	244	37	angle	angle	NOUN
ispiv-39	244	38	increased	increase	VERB
ispiv-39	244	39	from	from	ADP
ispiv-39	244	40	90	90	NUM
ispiv-39	244	41	°	°	NOUN
ispiv-39	244	42	(	(	PUNCT
ispiv-39	244	43	i.e.	i.e.	X
ispiv-39	244	44	,	,	PUNCT
ispiv-39	244	45	side	side	NOUN
ispiv-39	244	46	position	position	NOUN
ispiv-39	244	47	)	)	PUNCT
ispiv-39	244	48	to	to	ADP
ispiv-39	244	49	180	180	NUM
ispiv-39	244	50	°	°	NOUN
ispiv-39	244	51	(	(	PUNCT
ispiv-39	244	52	i.e.	i.e.	X
ispiv-39	244	53	,	,	PUNCT
ispiv-39	244	54	right	right	ADV
ispiv-39	244	55	ahead	ahead	ADV
ispiv-39	244	56	the	the	DET
ispiv-39	244	57	rotors	rotor	NOUN
ispiv-39	244	58	)	)	PUNCT
ispiv-39	244	59	,	,	PUNCT
ispiv-39	244	60	and	and	CCONJ
ispiv-39	244	61	to	to	PART
ispiv-39	244	62	increase	increase	VERB
ispiv-39	244	63	as	as	ADP
ispiv-39	244	64	the	the	DET
ispiv-39	244	65	separation	separation	NOUN
ispiv-39	244	66	distance	distance	NOUN
ispiv-39	244	67	reduced	reduce	VERB
ispiv-39	244	68	from	from	ADP
ispiv-39	244	69	l	l	NOUN
ispiv-39	244	70	=	=	SYM
ispiv-39	244	71	1.0d	1.0d	NOUN
ispiv-39	244	72	to	to	ADP
ispiv-39	244	73	l	l	NOUN
ispiv-39	244	74	=	=	SYM
ispiv-39	244	75	0.05d	0.05d	PROPN
ispiv-39	244	76	.	.	PUNCT
ispiv-39	245	1	a	a	DET
ispiv-39	245	2	maximum	maximum	ADJ
ispiv-39	245	3	noise	noise	NOUN
ispiv-39	245	4	enhancement	enhancement	NOUN
ispiv-39	245	5	of	of	ADP
ispiv-39	245	6	~3	~3	NOUN
ispiv-39	245	7	db	db	PROPN
ispiv-39	245	8	was	be	AUX
ispiv-39	245	9	recorded	record	VERB
ispiv-39	245	10	for	for	ADP
ispiv-39	245	11	the	the	DET
ispiv-39	245	12	l	l	NOUN
ispiv-39	245	13	=	=	SYM
ispiv-39	245	14	0.05d	0.05d	PROPN
ispiv-39	245	15	case	case	NOUN
ispiv-39	245	16	in	in	ADP
ispiv-39	245	17	comparison	comparison	NOUN
ispiv-39	245	18	to	to	ADP
ispiv-39	245	19	that	that	PRON
ispiv-39	245	20	of	of	ADP
ispiv-39	245	21	the	the	DET
ispiv-39	245	22	l	l	NOUN
ispiv-39	245	23	=	=	SYM
ispiv-39	245	24	1.0d	1.0d	NOUN
ispiv-39	245	25	case	case	NOUN
ispiv-39	245	26	,	,	PUNCT
ispiv-39	245	27	which	which	PRON
ispiv-39	245	28	is	be	AUX
ispiv-39	245	29	the	the	DET
ispiv-39	245	30	result	result	NOUN
ispiv-39	245	31	of	of	ADP
ispiv-39	245	32	both	both	CCONJ
ispiv-39	245	33	tonal	tonal	ADJ
ispiv-39	245	34	and	and	CCONJ
ispiv-39	245	35	broadband	broadband	NOUN
ispiv-39	245	36	noise	noise	NOUN
ispiv-39	245	37	augmentations	augmentation	NOUN
ispiv-39	245	38	as	as	SCONJ
ispiv-39	245	39	indicated	indicate	VERB
ispiv-39	245	40	in	in	ADP
ispiv-39	245	41	the	the	DET
ispiv-39	245	42	sound	sound	NOUN
ispiv-39	245	43	spectrum	spectrum	NOUN
ispiv-39	245	44	analysis	analysis	NOUN
ispiv-39	245	45	.	.	PUNCT
ispiv-39	246	1	as	as	SCONJ
ispiv-39	246	2	shown	show	VERB
ispiv-39	246	3	quantitatively	quantitatively	ADV
ispiv-39	246	4	from	from	ADP
ispiv-39	246	5	the	the	DET
ispiv-39	246	6	planar	planar	ADJ
ispiv-39	246	7	piv	piv	NOUN
ispiv-39	246	8	and	and	CCONJ
ispiv-39	246	9	stereoscopic	stereoscopic	ADJ
ispiv-39	246	10	piv	piv	NOUN
ispiv-39	246	11	measurement	measurement	NOUN
ispiv-39	246	12	results	result	VERB
ispiv-39	246	13	,	,	PUNCT
ispiv-39	246	14	the	the	DET
ispiv-39	246	15	induced	induced	ADJ
ispiv-39	246	16	flow	flow	NOUN
ispiv-39	246	17	behind	behind	ADP
ispiv-39	246	18	the	the	DET
ispiv-39	246	19	rotors	rotor	NOUN
ispiv-39	246	20	was	be	AUX
ispiv-39	246	21	found	find	VERB
ispiv-39	246	22	to	to	PART
ispiv-39	246	23	contract	contract	VERB
ispiv-39	246	24	radially	radially	ADV
ispiv-39	246	25	toward	toward	ADP
ispiv-39	246	26	the	the	DET
ispiv-39	246	27	axis	axis	NOUN
ispiv-39	246	28	of	of	ADP
ispiv-39	246	29	the	the	DET
ispiv-39	246	30	rotor	rotor	NOUN
ispiv-39	246	31	as	as	ADP
ispiv-39	246	32	the	the	DET
ispiv-39	246	33	flow	flow	NOUN
ispiv-39	246	34	convected	convect	VERB
ispiv-39	246	35	downstream	downstream	NOUN
ispiv-39	246	36	.	.	PUNCT
ispiv-39	247	1	for	for	ADP
ispiv-39	247	2	the	the	DET
ispiv-39	247	3	single	single	ADJ
ispiv-39	247	4	rotor	rotor	NOUN
ispiv-39	247	5	case	case	NOUN
ispiv-39	247	6	,	,	PUNCT
ispiv-39	247	7	while	while	SCONJ
ispiv-39	247	8	most	most	ADJ
ispiv-39	247	9	of	of	ADP
ispiv-39	247	10	the	the	DET
ispiv-39	247	11	regions	region	NOUN
ispiv-39	247	12	in	in	ADP
ispiv-39	247	13	the	the	DET
ispiv-39	247	14	wake	wake	NOUN
ispiv-39	247	15	were	be	AUX
ispiv-39	247	16	devoid	devoid	ADJ
ispiv-39	247	17	of	of	ADP
ispiv-39	247	18	flow	flow	NOUN
ispiv-39	247	19	structures	structure	NOUN
ispiv-39	247	20	,	,	PUNCT
ispiv-39	247	21	only	only	ADV
ispiv-39	247	22	the	the	DET
ispiv-39	247	23	region	region	NOUN
ispiv-39	247	24	near	near	ADP
ispiv-39	247	25	the	the	DET
ispiv-39	247	26	blade	blade	NOUN
ispiv-39	247	27	tips	tip	NOUN
ispiv-39	247	28	was	be	AUX
ispiv-39	247	29	characterized	characterize	VERB
ispiv-39	247	30	by	by	ADP
ispiv-39	247	31	elevated	elevated	ADJ
ispiv-39	247	32	inplain	inplain	NOUN
ispiv-39	247	33	tke	tke	NOUN
ispiv-39	247	34	(	(	PUNCT
ispiv-39	247	35	i.e.	i.e.	X
ispiv-39	247	36	,	,	PUNCT
ispiv-39	247	37	in	in	ADP
ispiv-39	247	38	x	x	ADJ
ispiv-39	247	39	-	-	PROPN
ispiv-39	247	40	z	z	ADJ
ispiv-39	247	41	plane	plane	NOUN
ispiv-39	247	42	)	)	PUNCT
ispiv-39	247	43	due	due	ADP
ispiv-39	247	44	to	to	ADP
ispiv-39	247	45	periodic	periodic	ADJ
ispiv-39	247	46	tip	tip	NOUN
ispiv-39	247	47	vortex	vortex	NOUN
ispiv-39	247	48	shedding	shedding	NOUN
ispiv-39	247	49	.	.	PUNCT
ispiv-39	248	1	a	a	DET
ispiv-39	248	2	similar	similar	ADJ
ispiv-39	248	3	phenomenon	phenomenon	NOUN
ispiv-39	248	4	was	be	AUX
ispiv-39	248	5	observed	observe	VERB
ispiv-39	248	6	for	for	ADP
ispiv-39	248	7	the	the	DET
ispiv-39	248	8	twin	twin	ADJ
ispiv-39	248	9	-	-	PUNCT
ispiv-39	248	10	rotor	rotor	NOUN
ispiv-39	248	11	case	case	NOUN
ispiv-39	248	12	,	,	PUNCT
ispiv-39	248	13	except	except	SCONJ
ispiv-39	248	14	that	that	SCONJ
ispiv-39	248	15	the	the	DET
ispiv-39	248	16	tke	tke	NOUN
ispiv-39	248	17	region	region	NOUN
ispiv-39	248	18	was	be	AUX
ispiv-39	248	19	significantly	significantly	ADV
ispiv-39	248	20	higher	high	ADJ
ispiv-39	248	21	at	at	ADP
ispiv-39	248	22	the	the	DET
ispiv-39	248	23	topright	topright	PROPN
ispiv-39	248	24	area	area	NOUN
ispiv-39	248	25	than	than	ADP
ispiv-39	248	26	that	that	PRON
ispiv-39	248	27	of	of	ADP
ispiv-39	248	28	single	single	ADJ
ispiv-39	248	29	rotor	rotor	NOUN
ispiv-39	248	30	case	case	NOUN
ispiv-39	248	31	.	.	PUNCT
ispiv-39	249	1	due	due	ADP
ispiv-39	249	2	to	to	ADP
ispiv-39	249	3	the	the	DET
ispiv-39	249	4	resultant	resultant	NOUN
ispiv-39	249	5	effect	effect	NOUN
ispiv-39	249	6	of	of	ADP
ispiv-39	249	7	upwash	upwash	NOUN
ispiv-39	249	8	and	and	CCONJ
ispiv-39	249	9	radial	radial	ADJ
ispiv-39	249	10	flows	flow	NOUN
ispiv-39	249	11	in	in	ADP
ispiv-39	249	12	the	the	DET
ispiv-39	249	13	near	near	ADJ
ispiv-39	249	14	wake	wake	NOUN
ispiv-39	249	15	of	of	ADP
ispiv-39	249	16	the	the	DET
ispiv-39	249	17	twin	twin	ADJ
ispiv-39	249	18	-	-	PUNCT
ispiv-39	249	19	rotor	rotor	NOUN
ispiv-39	249	20	case	case	NOUN
ispiv-39	249	21	,	,	PUNCT
ispiv-39	249	22	a	a	DET
ispiv-39	249	23	region	region	NOUN
ispiv-39	249	24	with	with	ADP
ispiv-39	249	25	a	a	DET
ispiv-39	249	26	flow	flow	NOUN
ispiv-39	249	27	separation	separation	NOUN
ispiv-39	249	28	was	be	AUX
ispiv-39	249	29	identified	identify	VERB
ispiv-39	249	30	in	in	ADP
ispiv-39	249	31	the	the	DET
ispiv-39	249	32	x	x	PROPN
ispiv-39	249	33	-	-	PROPN
ispiv-39	249	34	y	y	PROPN
ispiv-39	249	35	cross	cross	NOUN
ispiv-39	249	36	plane	plane	NOUN
ispiv-39	249	37	,	,	PUNCT
ispiv-39	249	38	which	which	PRON
ispiv-39	249	39	led	lead	VERB
ispiv-39	249	40	to	to	ADP
ispiv-39	249	41	significantly	significantly	ADV
ispiv-39	249	42	higher	high	ADJ
ispiv-39	249	43	tke	tke	NOUN
ispiv-39	249	44	distributions	distribution	NOUN
ispiv-39	249	45	and	and	CCONJ
ispiv-39	249	46	thrust	thrust	VERB
ispiv-39	249	47	fluctuations	fluctuation	NOUN
ispiv-39	249	48	behind	behind	ADP
ispiv-39	249	49	the	the	DET
ispiv-39	249	50	twin	twin	ADJ
ispiv-39	249	51	rotors	rotor	NOUN
ispiv-39	249	52	.	.	PUNCT
ispiv-39	250	1	it	it	PRON
ispiv-39	250	2	should	should	AUX
ispiv-39	250	3	also	also	ADV
ispiv-39	250	4	be	be	AUX
ispiv-39	250	5	noted	note	VERB
ispiv-39	250	6	that	that	SCONJ
ispiv-39	250	7	the	the	DET
ispiv-39	250	8	velocity	velocity	NOUN
ispiv-39	250	9	field	field	NOUN
ispiv-39	250	10	for	for	ADP
ispiv-39	250	11	the	the	DET
ispiv-39	250	12	twin	twin	ADJ
ispiv-39	250	13	-	-	PUNCT
ispiv-39	250	14	rotor	rotor	NOUN
ispiv-39	250	15	case	case	NOUN
ispiv-39	250	16	was	be	AUX
ispiv-39	250	17	found	find	VERB
ispiv-39	250	18	to	to	PART
ispiv-39	250	19	be	be	AUX
ispiv-39	250	20	attracted	attract	VERB
ispiv-39	250	21	and	and	CCONJ
ispiv-39	250	22	bent	bend	VERB
ispiv-39	250	23	toward	toward	ADP
ispiv-39	250	24	the	the	DET
ispiv-39	250	25	nearby	nearby	ADJ
ispiv-39	250	26	rotor	rotor	NOUN
ispiv-39	250	27	due	due	ADP
ispiv-39	250	28	to	to	ADP
ispiv-39	250	29	the	the	DET
ispiv-39	250	30	coanda	coanda	NOUN
ispiv-39	250	31	effect	effect	NOUN
ispiv-39	250	32	.	.	PUNCT
ispiv-39	251	1	in	in	ADP
ispiv-39	251	2	general	general	ADJ
ispiv-39	251	3	,	,	PUNCT
ispiv-39	251	4	the	the	DET
ispiv-39	251	5	measured	measure	VERB
ispiv-39	251	6	quantitative	quantitative	ADJ
ispiv-39	251	7	results	result	NOUN
ispiv-39	251	8	given	give	VERB
ispiv-39	251	9	in	in	ADP
ispiv-39	251	10	the	the	DET
ispiv-39	251	11	present	present	ADJ
ispiv-39	251	12	study	study	NOUN
ispiv-39	251	13	are	be	AUX
ispiv-39	251	14	believed	believe	VERB
ispiv-39	251	15	to	to	PART
ispiv-39	251	16	be	be	AUX
ispiv-39	251	17	very	very	ADV
ispiv-39	251	18	beneficial	beneficial	ADJ
ispiv-39	251	19	in	in	ADP
ispiv-39	251	20	understanding	understand	VERB
ispiv-39	251	21	how	how	SCONJ
ispiv-39	251	22	rotor	rotor	NOUN
ispiv-39	251	23	-	-	PUNCT
ispiv-39	251	24	rotor	rotor	NOUN
ispiv-39	251	25	interactions	interaction	NOUN
ispiv-39	251	26	affect	affect	VERB
ispiv-39	251	27	the	the	DET
ispiv-39	251	28	aerodynamic	aerodynamic	ADJ
ispiv-39	251	29	and	and	CCONJ
ispiv-39	251	30	aeroacoustic	aeroacoustic	ADJ
ispiv-39	251	31	performances	performance	NOUN
ispiv-39	251	32	of	of	ADP
ispiv-39	251	33	small	small	ADJ
ispiv-39	251	34	uavs	uavs	NOUN
ispiv-39	251	35	.	.	PUNCT
ispiv-39	252	1	it	it	PRON
ispiv-39	252	2	depicted	depict	VERB
ispiv-39	252	3	a	a	DET
ispiv-39	252	4	vivid	vivid	ADJ
ispiv-39	252	5	picture	picture	NOUN
ispiv-39	252	6	regarding	regard	VERB
ispiv-39	252	7	the	the	DET
ispiv-39	252	8	complex	complex	ADJ
ispiv-39	252	9	flow	flow	NOUN
ispiv-39	252	10	features	feature	NOUN
ispiv-39	252	11	behind	behind	ADP
ispiv-39	252	12	the	the	DET
ispiv-39	252	13	rotors	rotor	NOUN
ispiv-39	252	14	,	,	PUNCT
ispiv-39	252	15	which	which	PRON
ispiv-39	252	16	further	far	ADV
ispiv-39	252	17	explained	explain	VERB
ispiv-39	252	18	their	their	PRON
ispiv-39	252	19	correlations	correlation	NOUN
ispiv-39	252	20	with	with	ADP
ispiv-39	252	21	the	the	DET
ispiv-39	252	22	enhanced	enhanced	ADJ
ispiv-39	252	23	force	force	NOUN
ispiv-39	252	24	fluctuations	fluctuation	NOUN
ispiv-39	252	25	and	and	CCONJ
ispiv-39	252	26	noise	noise	NOUN
ispiv-39	252	27	levels	level	NOUN
ispiv-39	252	28	.	.	PUNCT
ispiv-39	253	1	such	such	ADJ
ispiv-39	253	2	quantitative	quantitative	ADJ
ispiv-39	253	3	information	information	NOUN
ispiv-39	253	4	is	be	AUX
ispiv-39	253	5	highly	highly	ADV
ispiv-39	253	6	desirable	desirable	ADJ
ispiv-39	253	7	to	to	PART
ispiv-39	253	8	elucidate	elucidate	VERB
ispiv-39	253	9	the	the	DET
ispiv-39	253	10	underlying	underlie	VERB
ispiv-39	253	11	physics	physics	NOUN
ispiv-39	253	12	pertinent	pertinent	NOUN
ispiv-39	253	13	to	to	ADP
ispiv-39	253	14	rotor	rotor	NOUN
ispiv-39	253	15	interactions	interaction	NOUN
ispiv-39	253	16	,	,	PUNCT
ispiv-39	253	17	and	and	CCONJ
ispiv-39	253	18	to	to	PART
ispiv-39	253	19	explore	explore	VERB
ispiv-39	253	20	/	/	SYM
ispiv-39	253	21	optimize	optimize	NOUN
ispiv-39	253	22	design	design	NOUN
ispiv-39	253	23	paradigms	paradigm	NOUN
ispiv-39	253	24	for	for	ADP
ispiv-39	253	25	better	well	ADJ
ispiv-39	253	26	commercial	commercial	ADJ
ispiv-39	253	27	uav	uav	PROPN
ispiv-39	253	28	designs	design	NOUN
ispiv-39	253	29	.	.	PUNCT
ispiv-39	254	1	acknowledgments	acknowledgment	NOUN
ispiv-39	254	2	the	the	DET
ispiv-39	254	3	supported	support	VERB
ispiv-39	254	4	of	of	ADP
ispiv-39	254	5	national	national	PROPN
ispiv-39	254	6	science	science	PROPN
ispiv-39	254	7	foundation	foundation	PROPN
ispiv-39	254	8	(	(	PUNCT
ispiv-39	254	9	usf	usf	PROPN
ispiv-39	254	10	)	)	PUNCT
ispiv-39	254	11	usa	usa	PROPN
ispiv-39	254	12	with	with	ADP
ispiv-39	254	13	grant	grant	NOUN
ispiv-39	254	14	numbers	number	NOUN
ispiv-39	254	15	of	of	ADP
ispiv-39	254	16	cbet	cbet	NOUN
ispiv-39	254	17	1438099	1438099	NUM
ispiv-39	254	18	is	be	AUX
ispiv-39	254	19	gratefully	gratefully	ADV
ispiv-39	254	20	acknowledged	acknowledge	VERB
ispiv-39	254	21	.	.	PUNCT
ispiv-39	255	1	references	reference	NOUN
ispiv-39	255	2	blackstock	blackstock	PROPN
ispiv-39	255	3	dt	dt	PROPN
ispiv-39	255	4	(	(	PUNCT
ispiv-39	255	5	2000	2000	NUM
ispiv-39	255	6	)	)	PUNCT
ispiv-39	255	7	fundamentals	fundamental	NOUN
ispiv-39	255	8	of	of	ADP
ispiv-39	255	9	physical	physical	ADJ
ispiv-39	255	10	acoustics	acoustic	NOUN
ispiv-39	255	11	.	.	PUNCT
ispiv-39	256	1	a	a	DET
ispiv-39	256	2	wiley	wiley	PROPN
ispiv-39	256	3	-	-	PUNCT
ispiv-39	256	4	interscience	interscience	NOUN
ispiv-39	256	5	bouabdallah	bouabdallah	VERB
ispiv-39	256	6	s	s	PROPN
ispiv-39	256	7	,	,	PUNCT
ispiv-39	256	8	becker	becker	PROPN
ispiv-39	256	9	m	m	PROPN
ispiv-39	256	10	,	,	PUNCT
ispiv-39	256	11	siegwart	siegwart	ADJ
ispiv-39	256	12	r	r	NOUN
ispiv-39	256	13	(	(	PUNCT
ispiv-39	256	14	2007	2007	NUM
ispiv-39	256	15	)	)	PUNCT
ispiv-39	256	16	autonomous	autonomous	ADJ
ispiv-39	256	17	miniature	miniature	ADJ
ispiv-39	256	18	flying	fly	VERB
ispiv-39	256	19	robots	robot	NOUN
ispiv-39	256	20	:	:	PUNCT
ispiv-39	256	21	coming	come	VERB
ispiv-39	256	22	soon	soon	ADV
ispiv-39	256	23	!	!	PUNCT
ispiv-39	257	1	research	research	NOUN
ispiv-39	257	2	,	,	PUNCT
ispiv-39	257	3	development	development	NOUN
ispiv-39	257	4	,	,	PUNCT
ispiv-39	257	5	and	and	CCONJ
ispiv-39	257	6	results	result	NOUN
ispiv-39	257	7	.	.	PUNCT
ispiv-39	258	1	ieee	ieee	NOUN
ispiv-39	258	2	robot	robot	PROPN
ispiv-39	258	3	autom	autom	PROPN
ispiv-39	258	4	mag	mag	PROPN
ispiv-39	258	5	14:88–98	14:88–98	NUM
ispiv-39	258	6	.	.	PUNCT
ispiv-39	259	1	https://doi.org/10.1109/mra.2007.901323	https://doi.org/10.1109/mra.2007.901323	ADJ
ispiv-39	259	2	brandt	brandt	PROPN
ispiv-39	259	3	j	j	PROPN
ispiv-39	259	4	,	,	PUNCT
ispiv-39	259	5	selig	selig	PROPN
ispiv-39	259	6	m	m	PROPN
ispiv-39	259	7	(	(	PUNCT
ispiv-39	259	8	2011	2011	NUM
ispiv-39	259	9	)	)	PUNCT
ispiv-39	259	10	propeller	propeller	NOUN
ispiv-39	259	11	performance	performance	NOUN
ispiv-39	259	12	data	datum	NOUN
ispiv-39	259	13	at	at	ADP
ispiv-39	259	14	low	low	ADJ
ispiv-39	259	15	reynolds	reynolds	PROPN
ispiv-39	259	16	numbers	number	NOUN
ispiv-39	259	17	.	.	PUNCT
ispiv-39	260	1	in	in	ADP
ispiv-39	260	2	:	:	PUNCT
ispiv-39	260	3	49th	49th	ADJ
ispiv-39	260	4	aiaa	aiaa	PROPN
ispiv-39	260	5	aerospace	aerospace	PROPN
ispiv-39	260	6	sciences	sciences	PROPN
ispiv-39	260	7	meeting	meeting	NOUN
ispiv-39	260	8	including	include	VERB
ispiv-39	260	9	the	the	DET
ispiv-39	260	10	new	new	ADJ
ispiv-39	260	11	horizons	horizon	NOUN
ispiv-39	260	12	forum	forum	NOUN
ispiv-39	260	13	and	and	CCONJ
ispiv-39	260	14	aerospace	aerospace	NOUN
ispiv-39	260	15	exposition	exposition	NOUN
ispiv-39	260	16	.	.	PUNCT
ispiv-39	261	1	american	american	PROPN
ispiv-39	261	2	institute	institute	PROPN
ispiv-39	261	3	of	of	ADP
ispiv-39	261	4	aeronautics	aeronautics	PROPN
ispiv-39	261	5	and	and	CCONJ
ispiv-39	261	6	astronautics	astronautics	PROPN
ispiv-39	261	7	bristeau	bristeau	PROPN
ispiv-39	261	8	p	p	PROPN
ispiv-39	261	9	,	,	PUNCT
ispiv-39	261	10	martin	martin	PROPN
ispiv-39	261	11	p	p	X
ispiv-39	261	12	,	,	PUNCT
ispiv-39	261	13	salaün	salaün	X
ispiv-39	261	14	e	e	X
ispiv-39	261	15	(	(	PUNCT
ispiv-39	261	16	2009	2009	NUM
ispiv-39	261	17	)	)	PUNCT
ispiv-39	261	18	the	the	DET
ispiv-39	261	19	role	role	NOUN
ispiv-39	261	20	of	of	ADP
ispiv-39	261	21	propeller	propeller	NOUN
ispiv-39	261	22	aerodynamics	aerodynamic	NOUN
ispiv-39	261	23	in	in	ADP
ispiv-39	261	24	the	the	DET
ispiv-39	261	25	model	model	NOUN
ispiv-39	261	26	of	of	ADP
ispiv-39	261	27	a	a	DET
ispiv-39	261	28	quadrotor	quadrotor	PROPN
ispiv-39	261	29	uav	uav	PROPN
ispiv-39	261	30	.	.	PUNCT
ispiv-39	262	1	in	in	ADP
ispiv-39	262	2	:	:	PUNCT
ispiv-39	262	3	control	control	NOUN
ispiv-39	262	4	conference	conference	PROPN
ispiv-39	262	5	(	(	PUNCT
ispiv-39	262	6	ecc	ecc	PROPN
ispiv-39	262	7	carolus	carolus	PROPN
ispiv-39	262	8	t	t	PROPN
ispiv-39	262	9	,	,	PUNCT
ispiv-39	262	10	schneider	schneider	PROPN
ispiv-39	262	11	m	m	PROPN
ispiv-39	262	12	,	,	PUNCT
ispiv-39	262	13	reese	reese	PROPN
ispiv-39	262	14	h	h	PROPN
ispiv-39	262	15	(	(	PUNCT
ispiv-39	262	16	2007	2007	NUM
ispiv-39	262	17	)	)	PUNCT
ispiv-39	262	18	axial	axial	ADJ
ispiv-39	262	19	flow	flow	NOUN
ispiv-39	262	20	fan	fan	PROPN
ispiv-39	262	21	broad	broad	ADJ
ispiv-39	262	22	-	-	PUNCT
ispiv-39	262	23	band	band	NOUN
ispiv-39	262	24	noise	noise	NOUN
ispiv-39	262	25	and	and	CCONJ
ispiv-39	262	26	prediction	prediction	NOUN
ispiv-39	262	27	.	.	PUNCT
ispiv-39	263	1	j	j	PROPN
ispiv-39	263	2	sound	sound	VERB
ispiv-39	263	3	vib	vib	PROPN
ispiv-39	263	4	300:50–70	300:50–70	PROPN
ispiv-39	263	5	.	.	PUNCT
ispiv-39	264	1	https://doi.org/10.1016/j.jsv.2006.07.025	https://doi.org/10.1016/j.jsv.2006.07.025	ADV
ispiv-39	264	2	ditmer	ditmer	PROPN
ispiv-39	264	3	ma	ma	PROPN
ispiv-39	264	4	,	,	PUNCT
ispiv-39	264	5	vincent	vincent	PROPN
ispiv-39	264	6	jb	jb	PROPN
ispiv-39	264	7	,	,	PUNCT
ispiv-39	264	8	werden	werden	PROPN
ispiv-39	264	9	lk	lk	PROPN
ispiv-39	264	10	,	,	PUNCT
ispiv-39	264	11	et	et	PROPN
ispiv-39	264	12	al	al	PROPN
ispiv-39	264	13	(	(	PUNCT
ispiv-39	264	14	2015	2015	NUM
ispiv-39	264	15	)	)	PUNCT
ispiv-39	264	16	bears	bear	NOUN
ispiv-39	264	17	show	show	VERB
ispiv-39	264	18	a	a	DET
ispiv-39	264	19	physiological	physiological	ADJ
ispiv-39	264	20	but	but	CCONJ
ispiv-39	264	21	limited	limited	ADJ
ispiv-39	264	22	behavioral	behavioral	ADJ
ispiv-39	264	23	response	response	NOUN
ispiv-39	264	24	to	to	ADP
ispiv-39	264	25	unmanned	unmanned	ADJ
ispiv-39	264	26	aerial	aerial	ADJ
ispiv-39	264	27	vehicles	vehicle	NOUN
ispiv-39	264	28	.	.	PUNCT
ispiv-39	265	1	curr	curr	PROPN
ispiv-39	265	2	biol	biol	PROPN
ispiv-39	265	3	25:2278–2283	25:2278–2283	PROPN
ispiv-39	265	4	.	.	PUNCT
ispiv-39	266	1	https://doi.org/10.1016/j.cub.2015.07.024	https://doi.org/10.1016/j.cub.2015.07.024	PROPN
ispiv-39	266	2	goebel	goebel	NOUN
ispiv-39	266	3	me	i	PRON
ispiv-39	266	4	,	,	PUNCT
ispiv-39	266	5	perryman	perryman	PROPN
ispiv-39	266	6	wl	wl	PROPN
ispiv-39	266	7	,	,	PUNCT
ispiv-39	266	8	hinke	hinke	PROPN
ispiv-39	266	9	jt	jt	PROPN
ispiv-39	266	10	,	,	PUNCT
ispiv-39	266	11	et	et	PROPN
ispiv-39	266	12	al	al	PROPN
ispiv-39	266	13	(	(	PUNCT
ispiv-39	266	14	2015	2015	NUM
ispiv-39	266	15	)	)	PUNCT
ispiv-39	266	16	a	a	DET
ispiv-39	266	17	small	small	ADJ
ispiv-39	266	18	unmanned	unmanned	ADJ
ispiv-39	266	19	aerial	aerial	ADJ
ispiv-39	266	20	system	system	NOUN
ispiv-39	266	21	for	for	ADP
ispiv-39	266	22	estimating	estimate	VERB
ispiv-39	266	23	abundance	abundance	NOUN
ispiv-39	266	24	and	and	CCONJ
ispiv-39	266	25	size	size	NOUN
ispiv-39	266	26	of	of	ADP
ispiv-39	266	27	antarctic	antarctic	ADJ
ispiv-39	266	28	predators	predator	NOUN
ispiv-39	266	29	.	.	PUNCT
ispiv-39	267	1	polar	polar	ADJ
ispiv-39	267	2	biol	biol	NOUN
ispiv-39	267	3	38:619–630	38:619–630	PROPN
ispiv-39	267	4	.	.	PUNCT
ispiv-39	268	1	https://doi.org/10.1007/s00300-014-1625-4	https://doi.org/10.1007/s00300-014-1625-4	NUM
ispiv-39	268	2	gur	gur	PROPN
ispiv-39	268	3	o	o	PROPN
ispiv-39	268	4	,	,	PUNCT
ispiv-39	268	5	rosen	rosen	PROPN
ispiv-39	268	6	a	a	DET
ispiv-39	268	7	(	(	PUNCT
ispiv-39	268	8	2009	2009	NUM
ispiv-39	268	9	)	)	PUNCT
ispiv-39	268	10	design	design	NOUN
ispiv-39	268	11	of	of	ADP
ispiv-39	268	12	quiet	quiet	ADJ
ispiv-39	268	13	propeller	propeller	NOUN
ispiv-39	268	14	for	for	ADP
ispiv-39	268	15	an	an	DET
ispiv-39	268	16	electric	electric	ADJ
ispiv-39	268	17	mini	mini	ADJ
ispiv-39	268	18	unmanned	unmanned	ADJ
ispiv-39	268	19	air	air	NOUN
ispiv-39	268	20	vehicle	vehicle	NOUN
ispiv-39	268	21	.	.	PUNCT
ispiv-39	269	1	j	j	PROPN
ispiv-39	269	2	propuls	propuls	PROPN
ispiv-39	269	3	power	power	PROPN
ispiv-39	269	4	25:717–728	25:717–728	PROPN
ispiv-39	269	5	.	.	PUNCT
ispiv-39	270	1	https://doi.org/10.2514/1.38814	https://doi.org/10.2514/1.38814	PROPN
ispiv-39	270	2	hu	hu	PROPN
ispiv-39	271	1	h	h	PROPN
ispiv-39	271	2	,	,	PUNCT
ispiv-39	271	3	wei	wei	PROPN
ispiv-39	271	4	t	t	PROPN
ispiv-39	271	5	,	,	PUNCT
ispiv-39	271	6	wang	wang	PROPN
ispiv-39	271	7	z	z	PROPN
ispiv-39	271	8	(	(	PUNCT
ispiv-39	271	9	2016	2016	NUM
ispiv-39	271	10	)	)	PUNCT
ispiv-39	271	11	an	an	DET
ispiv-39	271	12	experimental	experimental	ADJ
ispiv-39	271	13	study	study	NOUN
ispiv-39	271	14	on	on	ADP
ispiv-39	271	15	the	the	DET
ispiv-39	271	16	wake	wake	NOUN
ispiv-39	271	17	characteristics	characteristic	NOUN
ispiv-39	271	18	of	of	ADP
ispiv-39	271	19	dual	dual	ADJ
ispiv-39	271	20	-	-	PUNCT
ispiv-39	271	21	rotor	rotor	NOUN
ispiv-39	271	22	wind	wind	NOUN
ispiv-39	271	23	turbines	turbine	NOUN
ispiv-39	271	24	by	by	ADP
ispiv-39	271	25	using	use	VERB
ispiv-39	271	26	a	a	DET
ispiv-39	271	27	stereoscopic	stereoscopic	ADJ
ispiv-39	271	28	piv	piv	NOUN
ispiv-39	271	29	technique	technique	NOUN
ispiv-39	271	30	.	.	PUNCT
ispiv-39	272	1	34th	34th	ADJ
ispiv-39	272	2	aiaa	aiaa	PROPN
ispiv-39	272	3	appl	appl	PROPN
ispiv-39	272	4	aerodyn	aerodyn	PROPN
ispiv-39	272	5	conf	conf	PROPN
ispiv-39	272	6	intaratep	intaratep	PROPN
ispiv-39	272	7	n	n	CCONJ
ispiv-39	272	8	,	,	PUNCT
ispiv-39	272	9	alexander	alexander	PROPN
ispiv-39	272	10	wn	wn	PROPN
ispiv-39	272	11	,	,	PUNCT
ispiv-39	272	12	devenport	devenport	PROPN
ispiv-39	272	13	wj	wj	PROPN
ispiv-39	272	14	,	,	PUNCT
ispiv-39	272	15	et	et	PROPN
ispiv-39	272	16	al	al	PROPN
ispiv-39	272	17	(	(	PUNCT
ispiv-39	272	18	2016	2016	NUM
ispiv-39	272	19	)	)	PUNCT
ispiv-39	272	20	experimental	experimental	ADJ
ispiv-39	272	21	study	study	NOUN
ispiv-39	272	22	of	of	ADP
ispiv-39	272	23	quadcopter	quadcopter	NOUN
ispiv-39	272	24	acoustics	acoustic	NOUN
ispiv-39	272	25	and	and	CCONJ
ispiv-39	272	26	performance	performance	NOUN
ispiv-39	272	27	at	at	ADP
ispiv-39	272	28	static	static	ADJ
ispiv-39	272	29	thrust	thrust	ADJ
ispiv-39	272	30	conditions	condition	NOUN
ispiv-39	272	31	.	.	PUNCT
ispiv-39	273	1	in	in	ADP
ispiv-39	273	2	:	:	PUNCT
ispiv-39	273	3	22nd	22nd	NOUN
ispiv-39	273	4	aiaa	aiaa	PROPN
ispiv-39	273	5	/	/	SYM
ispiv-39	273	6	ceas	ceas	PROPN
ispiv-39	273	7	aeroacoustics	aeroacoustics	PROPN
ispiv-39	273	8	conference	conference	PROPN
ispiv-39	273	9	.	.	PUNCT
ispiv-39	274	1	american	american	PROPN
ispiv-39	274	2	institute	institute	PROPN
ispiv-39	274	3	of	of	ADP
ispiv-39	274	4	aeronautics	aeronautics	PROPN
ispiv-39	274	5	and	and	CCONJ
ispiv-39	274	6	astronautics	astronautics	PROPN
ispiv-39	274	7	,	,	PUNCT
ispiv-39	274	8	reston	reston	PROPN
ispiv-39	274	9	,	,	PUNCT
ispiv-39	274	10	virginia	virginia	PROPN
ispiv-39	274	11	leishman	leishman	PROPN
ispiv-39	274	12	g	g	PROPN
ispiv-39	274	13	(	(	PUNCT
ispiv-39	274	14	2006	2006	NUM
ispiv-39	274	15	)	)	PUNCT
ispiv-39	274	16	principles	principle	NOUN
ispiv-39	274	17	of	of	ADP
ispiv-39	274	18	helicopter	helicopter	NOUN
ispiv-39	274	19	aerodynamics	aerodynamic	NOUN
ispiv-39	274	20	.	.	PUNCT
ispiv-39	275	1	cambridge	cambridge	PROPN
ispiv-39	275	2	university	university	PROPN
ispiv-39	275	3	press	press	PROPN
ispiv-39	275	4	leslie	leslie	PROPN
ispiv-39	275	5	a	a	PROPN
ispiv-39	275	6	,	,	PUNCT
ispiv-39	275	7	wong	wong	PROPN
ispiv-39	275	8	kc	kc	PROPN
ispiv-39	275	9	,	,	PUNCT
ispiv-39	275	10	auld	auld	PROPN
ispiv-39	275	11	d	d	X
ispiv-39	275	12	(	(	PUNCT
ispiv-39	275	13	2008	2008	NUM
ispiv-39	275	14	)	)	PUNCT
ispiv-39	275	15	broadband	broadband	NOUN
ispiv-39	275	16	noise	noise	NOUN
ispiv-39	275	17	reduction	reduction	NOUN
ispiv-39	275	18	on	on	ADP
ispiv-39	275	19	a	a	DET
ispiv-39	275	20	mini	mini	ADJ
ispiv-39	275	21	-	-	ADJ
ispiv-39	275	22	uav	uav	ADJ
ispiv-39	275	23	propeller	propeller	NOUN
ispiv-39	275	24	.	.	PUNCT
ispiv-39	276	1	in	in	ADP
ispiv-39	276	2	:	:	PUNCT
ispiv-39	276	3	14th	14th	ADJ
ispiv-39	276	4	aiaa	aiaa	PROPN
ispiv-39	276	5	/	/	SYM
ispiv-39	276	6	ceas	ceas	PROPN
ispiv-39	276	7	aeroacoustics	aeroacoustics	PROPN
ispiv-39	276	8	conference	conference	PROPN
ispiv-39	276	9	(	(	PUNCT
ispiv-39	276	10	29th	29th	ADJ
ispiv-39	276	11	aiaa	aiaa	ADJ
ispiv-39	276	12	aeroacoustics	aeroacoustic	NOUN
ispiv-39	276	13	conference	conference	PROPN
ispiv-39	276	14	)	)	PUNCT
ispiv-39	276	15	.	.	PUNCT
ispiv-39	277	1	american	american	PROPN
ispiv-39	277	2	institute	institute	PROPN
ispiv-39	277	3	of	of	ADP
ispiv-39	277	4	aeronautics	aeronautics	PROPN
ispiv-39	277	5	and	and	CCONJ
ispiv-39	277	6	astronautics	astronautics	PROPN
ispiv-39	277	7	,	,	PUNCT
ispiv-39	277	8	reston	reston	PROPN
ispiv-39	277	9	,	,	PUNCT
ispiv-39	277	10	virigina	virigina	PROPN
ispiv-39	277	11	lucieer	lucieer	PROPN
ispiv-39	277	12	a	a	PROPN
ispiv-39	277	13	,	,	PUNCT
ispiv-39	277	14	turner	turner	PROPN
ispiv-39	277	15	d	d	PROPN
ispiv-39	277	16	,	,	PUNCT
ispiv-39	277	17	king	king	PROPN
ispiv-39	277	18	dh	dh	PROPN
ispiv-39	277	19	,	,	PUNCT
ispiv-39	277	20	robinson	robinson	PROPN
ispiv-39	277	21	sa	sa	PROPN
ispiv-39	278	1	(	(	PUNCT
ispiv-39	278	2	2014	2014	NUM
ispiv-39	278	3	)	)	PUNCT
ispiv-39	278	4	using	use	VERB
ispiv-39	278	5	an	an	DET
ispiv-39	278	6	unmanned	unmanned	ADJ
ispiv-39	278	7	aerial	aerial	ADJ
ispiv-39	278	8	vehicle	vehicle	NOUN
ispiv-39	278	9	(	(	PUNCT
ispiv-39	278	10	uav	uav	PROPN
ispiv-39	278	11	)	)	PUNCT
ispiv-39	278	12	to	to	PART
ispiv-39	278	13	capture	capture	VERB
ispiv-39	278	14	micro	micro	NOUN
ispiv-39	278	15	-	-	NOUN
ispiv-39	278	16	topography	topography	NOUN
ispiv-39	278	17	of	of	ADP
ispiv-39	278	18	antarctic	antarctic	ADJ
ispiv-39	278	19	moss	moss	NOUN
ispiv-39	278	20	beds	bed	NOUN
ispiv-39	278	21	.	.	PUNCT
ispiv-39	279	1	int	int	PROPN
ispiv-39	279	2	j	j	PROPN
ispiv-39	279	3	appl	appl	PROPN
ispiv-39	279	4	earth	earth	PROPN
ispiv-39	279	5	obs	obs	PROPN
ispiv-39	279	6	geoinf	geoinf	VERB
ispiv-39	279	7	27:53–62	27:53–62	NUM
ispiv-39	279	8	.	.	PUNCT
ispiv-39	280	1	https://doi.org/10.1016/j.jag.2013.05.011	https://doi.org/10.1016/j.jag.2013.05.011	PROPN
ispiv-39	280	2	merchant	merchant	PROPN
ispiv-39	280	3	m	m	PROPN
ispiv-39	280	4	,	,	PUNCT
ispiv-39	280	5	miller	miller	PROPN
ispiv-39	280	6	ls	ls	PROPN
ispiv-39	280	7	(	(	PUNCT
ispiv-39	280	8	2006	2006	NUM
ispiv-39	280	9	)	)	PUNCT
ispiv-39	280	10	propeller	propeller	NOUN
ispiv-39	280	11	performance	performance	NOUN
ispiv-39	280	12	measurement	measurement	NOUN
ispiv-39	280	13	for	for	ADP
ispiv-39	280	14	low	low	ADJ
ispiv-39	280	15	reynolds	reynolds	PROPN
ispiv-39	280	16	number	number	PROPN
ispiv-39	280	17	uav	uav	PROPN
ispiv-39	280	18	applications	application	NOUN
ispiv-39	280	19	.	.	PUNCT
ispiv-39	281	1	in	in	ADP
ispiv-39	281	2	:	:	PUNCT
ispiv-39	281	3	44th	44th	ADJ
ispiv-39	281	4	aiaa	aiaa	PROPN
ispiv-39	281	5	aerospace	aerospace	PROPN
ispiv-39	281	6	sciences	sciences	PROPN
ispiv-39	281	7	meeting	meeting	NOUN
ispiv-39	281	8	and	and	CCONJ
ispiv-39	281	9	exhibit	exhibit	VERB
ispiv-39	281	10	.	.	PUNCT
ispiv-39	282	1	american	american	PROPN
ispiv-39	282	2	institute	institute	PROPN
ispiv-39	282	3	of	of	ADP
ispiv-39	282	4	aeronautics	aeronautics	PROPN
ispiv-39	282	5	and	and	CCONJ
ispiv-39	282	6	astronautics	astronautics	PROPN
ispiv-39	282	7	,	,	PUNCT
ispiv-39	282	8	reston	reston	PROPN
ispiv-39	282	9	,	,	PUNCT
ispiv-39	282	10	virigina	virigina	PROPN
ispiv-39	282	11	otsuka	otsuka	PROPN
ispiv-39	282	12	h	h	PROPN
ispiv-39	282	13	,	,	PUNCT
ispiv-39	282	14	nagatani	nagatani	PROPN
ispiv-39	282	15	k	k	PROPN
ispiv-39	282	16	(	(	PUNCT
ispiv-39	282	17	2016	2016	NUM
ispiv-39	282	18	)	)	PUNCT
ispiv-39	282	19	thrust	thrust	VERB
ispiv-39	282	20	loss	loss	NOUN
ispiv-39	282	21	saving	saving	NOUN
ispiv-39	282	22	design	design	NOUN
ispiv-39	282	23	of	of	ADP
ispiv-39	282	24	overlapping	overlap	VERB
ispiv-39	282	25	rotor	rotor	NOUN
ispiv-39	282	26	arrangement	arrangement	NOUN
ispiv-39	282	27	on	on	ADP
ispiv-39	282	28	small	small	ADJ
ispiv-39	282	29	multirotor	multirotor	NOUN
ispiv-39	282	30	unmanned	unmanned	ADJ
ispiv-39	282	31	aerial	aerial	ADJ
ispiv-39	282	32	vehicles	vehicle	NOUN
ispiv-39	282	33	.	.	PUNCT
ispiv-39	283	1	in	in	ADP
ispiv-39	283	2	:	:	PUNCT
ispiv-39	283	3	2016	2016	NUM
ispiv-39	283	4	ieee	ieee	NOUN
ispiv-39	283	5	international	international	ADJ
ispiv-39	283	6	conference	conference	NOUN
ispiv-39	283	7	on	on	ADP
ispiv-39	283	8	robotics	robotic	NOUN
ispiv-39	283	9	and	and	CCONJ
ispiv-39	283	10	automation	automation	NOUN
ispiv-39	283	11	(	(	PUNCT
ispiv-39	283	12	icra	icra	PROPN
ispiv-39	283	13	)	)	PUNCT
ispiv-39	283	14	.	.	PUNCT
ispiv-39	284	1	ieee	ieee	PROPN
ispiv-39	284	2	,	,	PUNCT
ispiv-39	284	3	pp	pp	PROPN
ispiv-39	284	4	3242–3248	3242–3248	NUM
ispiv-39	284	5	russell	russell	PROPN
ispiv-39	284	6	c	c	PROPN
ispiv-39	284	7	,	,	PUNCT
ispiv-39	284	8	jung	jung	PROPN
ispiv-39	284	9	j	j	PROPN
ispiv-39	284	10	,	,	PUNCT
ispiv-39	284	11	willink	willink	VERB
ispiv-39	284	12	g	g	NOUN
ispiv-39	284	13	,	,	PUNCT
ispiv-39	284	14	glasner	glasner	NOUN
ispiv-39	284	15	b	b	PROPN
ispiv-39	284	16	(	(	PUNCT
ispiv-39	284	17	2016	2016	NUM
ispiv-39	284	18	)	)	PUNCT
ispiv-39	284	19	wind	wind	NOUN
ispiv-39	284	20	tunnel	tunnel	NOUN
ispiv-39	284	21	and	and	CCONJ
ispiv-39	284	22	hover	hover	NOUN
ispiv-39	284	23	performance	performance	NOUN
ispiv-39	284	24	test	test	NOUN
ispiv-39	284	25	results	result	NOUN
ispiv-39	284	26	for	for	ADP
ispiv-39	284	27	multicopter	multicopter	PROPN
ispiv-39	284	28	uas	uas	PROPN
ispiv-39	284	29	vehicles	vehicle	NOUN
ispiv-39	284	30	.	.	PUNCT
ispiv-39	285	1	in	in	ADP
ispiv-39	285	2	:	:	PUNCT
ispiv-39	285	3	ahs	ahs	PROPN
ispiv-39	285	4	72nd	72nd	PROPN
ispiv-39	285	5	annual	annual	ADJ
ispiv-39	285	6	forum	forum	NOUN
ispiv-39	285	7	.	.	PUNCT
ispiv-39	286	1	fl	fl	ADP
ispiv-39	286	2	sinibaldi	sinibaldi	ADJ
ispiv-39	286	3	g	g	PROPN
ispiv-39	286	4	,	,	PUNCT
ispiv-39	286	5	marino	marino	PROPN
ispiv-39	286	6	l	l	PROPN
ispiv-39	286	7	(	(	PUNCT
ispiv-39	286	8	2013	2013	NUM
ispiv-39	286	9	)	)	PUNCT
ispiv-39	286	10	experimental	experimental	ADJ
ispiv-39	286	11	analysis	analysis	NOUN
ispiv-39	286	12	on	on	ADP
ispiv-39	286	13	the	the	DET
ispiv-39	286	14	noise	noise	NOUN
ispiv-39	286	15	of	of	ADP
ispiv-39	286	16	propellers	propeller	NOUN
ispiv-39	286	17	for	for	ADP
ispiv-39	286	18	small	small	PROPN
ispiv-39	286	19	uav	uav	PROPN
ispiv-39	286	20	.	.	PUNCT
ispiv-39	287	1	appl	appl	PROPN
ispiv-39	287	2	acoust	acoust	PROPN
ispiv-39	287	3	74:79–88	74:79–88	NUM
ispiv-39	287	4	.	.	PUNCT
ispiv-39	288	1	https://doi.org/10.1016/j.apacoust.2012.06.011	https://doi.org/10.1016/j.apacoust.2012.06.011	ADJ
ispiv-39	288	2	wang	wang	PROPN
ispiv-39	288	3	z	z	PROPN
ispiv-39	288	4	,	,	PUNCT
ispiv-39	288	5	tian	tian	PROPN
ispiv-39	288	6	w	w	PROPN
ispiv-39	288	7	,	,	PUNCT
ispiv-39	288	8	ozbay	ozbay	VERB
ispiv-39	288	9	a	a	PRON
ispiv-39	288	10	,	,	PUNCT
ispiv-39	288	11	et	et	PROPN
ispiv-39	288	12	al	al	PROPN
ispiv-39	288	13	(	(	PUNCT
ispiv-39	288	14	2016	2016	NUM
ispiv-39	288	15	)	)	PUNCT
ispiv-39	288	16	an	an	DET
ispiv-39	288	17	experimental	experimental	ADJ
ispiv-39	288	18	study	study	NOUN
ispiv-39	288	19	on	on	ADP
ispiv-39	288	20	the	the	DET
ispiv-39	288	21	aeromechanics	aeromechanic	NOUN
ispiv-39	288	22	and	and	CCONJ
ispiv-39	288	23	wake	wake	VERB
ispiv-39	288	24	characteristics	characteristic	NOUN
ispiv-39	288	25	of	of	ADP
ispiv-39	288	26	a	a	DET
ispiv-39	288	27	novel	novel	ADJ
ispiv-39	288	28	twin	twin	ADJ
ispiv-39	288	29	-	-	PUNCT
ispiv-39	288	30	rotor	rotor	NOUN
ispiv-39	288	31	wind	wind	NOUN
ispiv-39	288	32	turbine	turbine	NOUN
ispiv-39	288	33	in	in	ADP
ispiv-39	288	34	a	a	DET
ispiv-39	288	35	turbulent	turbulent	ADJ
ispiv-39	288	36	boundary	boundary	ADJ
ispiv-39	288	37	layer	layer	NOUN
ispiv-39	288	38	flow	flow	NOUN
ispiv-39	288	39	.	.	PUNCT
ispiv-39	289	1	exp	exp	NOUN
ispiv-39	289	2	fluids	fluid	NOUN
ispiv-39	289	3	57:150	57:150	PROPN
ispiv-39	289	4	.	.	PUNCT
ispiv-39	289	5	https://doi.org/10.1007/s00348-016-2233-6	https://doi.org/10.1007/s00348-016-2233-6	VERB
ispiv-39	290	1	yoon	yoon	PROPN
ispiv-39	290	2	s	s	PROPN
ispiv-39	290	3	,	,	PUNCT
ispiv-39	290	4	lee	lee	PROPN
ispiv-39	290	5	hch	hch	PROPN
ispiv-39	290	6	,	,	PUNCT
ispiv-39	290	7	pulliam	pulliam	PROPN
ispiv-39	290	8	th	th	PROPN
ispiv-39	290	9	(	(	PUNCT
ispiv-39	290	10	2016	2016	NUM
ispiv-39	290	11	)	)	PUNCT
ispiv-39	290	12	computational	computational	ADJ
ispiv-39	290	13	analysis	analysis	NOUN
ispiv-39	290	14	of	of	ADP
ispiv-39	290	15	multi	multi	ADJ
ispiv-39	290	16	-	-	ADJ
ispiv-39	290	17	rotor	rotor	ADJ
ispiv-39	290	18	flows	flow	NOUN
ispiv-39	290	19	.	.	PUNCT
ispiv-39	291	1	in	in	ADP
ispiv-39	291	2	:	:	PUNCT
ispiv-39	291	3	54th	54th	ADJ
ispiv-39	291	4	aiaa	aiaa	PROPN
ispiv-39	291	5	aerospace	aerospace	PROPN
ispiv-39	291	6	sciences	sciences	PROPN
ispiv-39	291	7	meeting	meeting	NOUN
ispiv-39	291	8	.	.	PUNCT
ispiv-39	292	1	american	american	PROPN
ispiv-39	292	2	institute	institute	PROPN
ispiv-39	292	3	of	of	ADP
ispiv-39	292	4	aeronautics	aeronautics	PROPN
ispiv-39	292	5	and	and	CCONJ
ispiv-39	292	6	astronautics	astronautics	PROPN
ispiv-39	292	7	,	,	PUNCT
ispiv-39	292	8	reston	reston	PROPN
ispiv-39	292	9	,	,	PUNCT
ispiv-39	292	10	virginia	virginia	PROPN