id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ap-776	Tesař, V.	Time-Mean Helicity Distribution in Turbulent Swirling Jets	2005	10	.pdf	application/pdf	6877	367	52	The profile shape may be improved by a long nozzle exit channel, but this generates a thick boundary layer (degrading the outer parts of the profile) and the inevitable fast dissipation of the swirl decreases the achiev- able magnitude of nozzle exit helicity. In practical flowfield studies, the variable of interest is the local quantity, helicity density � (m/s2) as defined in Fig.	cache/ap-776.pdf	txt/ap-776.txt