id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-11157		cet-11157		6	.pdf	application/pdf	3176	122	49	The numbers of propeller blades, propeller installation method and propeller diameter are selected according to the working conditions and the characteristic of the engine. Figure 5: Optimization flow chart As shown in Figure 6, contrasting the original and optimized chord length of propeller blades, the viscosity effect and the drag of blade element let the chord length distribution move inward, the chord length in the middle area increases, and the plane shape of the blades become full.	cache/cet-11157.pdf	txt/cet-11157.txt