In order to inhibit the flow separation on blade surface and improve the aerodynamic performance of the blade

the design scheme of installing vortex generator on the blade surface is proposed. Taking DU97-W-300blade section with vortex generator as the research object

the orthogonal experimental design method is used to investigate the influences of height

length

installation angle

chord installation position

spacing and pitch of the vortex generator on the aerodynamic performance of the blade section

so as to determine the basic law of vortex generator parameter design. The results show that

the vortex generator parameters that affect the magnitude of aerodynamic performance of the blade are as follows: spacing

pitch

length

height

chord installation position

and installation angle of the vortex generator. The optimal vortex generator parameter combination law is: height of 0.75ξ(ξ is blade boundary layer thickness)

length of 1.6ξ

installation angle of 20°

chord installation position is 10% blade chord length

spacing of 1.6ξ

pitch of 0.8ξ

which can increase the maximum lift coefficient of this blade by 40% and the maximum stall angle of attack by 9.5°.