关键词: 压气机叶片;压气机叶栅;叶型;气动特性

Abstract: To investigate the influence of the blade positive curved angle on the performance of compressor cascade, experiments were conducted in a low speed wind tunnel with planar cascade Rectangle compressor stator cascades consisting of four types of blades with controlled diffusion airfoils were tested These include: straight blades, positive curved angle 15°, 20°, and 25° blades The distribution of energy loss coefficient and vorticity at all cascade exits and static pressure coefficient on blade surface are acquired The results show that the loss of the curved blade cascade is reduced When the degree of curved angle is 20°, the loss of the cascade is least, and it is 16 15% less than the straight blade cascade On suction surface of positive curved blade, the "C" type static pressure distribution is created, and this distribution is enhanced with the increase of the blade curved angle

Key words: Compressor blade;Compressor cascade;Blade airfoil;Aerodynamic characteristic