抄録
To improve the aerodynamic performance of half-ducted propeller fans, it is important to reduce the separation zone, because it leads to energy loss. There is often a big separation zone downstream of the rotor blade root. A rotor blade, with tangential lean angle, has a blade force effect in the radial direction. It is found that the blade force in the inward radial direction is effective to reduce the separation zone and improve the aerodynamic performance of half-ducted propeller fans.
