��������������������������������ܵķ����о�

基于介质阻挡放电等离子体体积力气动激励机理,数值研究了两种等离子体流动控制方案对螺旋桨桨径根部处于负攻角工况下叶素气动性能的改善效果.结果显示,激励器布置在下翼面时等离子体体积力大于其布置在叶素前后缘时的情况；激励器布置在下翼面时,可抑制流动分离,使得螺旋桨桨根部位叶素产生更大的负拉力,但会减小螺旋桨的扭矩；激励器布置在前后缘时,会使螺旋桨根部叶素拉力增大,提高螺旋桨总拉力,但不能抑制流动分离,所以会增大螺旋桨的扭矩.

Numerical study on plasma flow control to enhance the aerodynamic characteristic of the aerofoil on propeller root region

Based on the body force aerodynamic actuation mechanism of dielectric barrier discharge(DBD) plasma,the effect of DBD plasma flow control to enhance the aerodynamic characteristics of aerofoil on propeller root region under the negative angle of attack condition was numerically studied at two kinds of actuator location schemes.The results show that the plasma induce body force imparted by the actuator located at down surface of the aerofoil is bigger than that imparted by the actuator located at front or behind of the aerofoil.When DBD actuator is located at down surface of the aerofoil,the separate flow phenomenon can be entirely restrained,but the negative thrust of propeller will increase,so the torque of propeller will decrease.When the actuator is located at front and behind of the aerofoil,the thrust generated by the aerofoil of propeller root region under the negative angle of attack condition will increase,but the separate flow phenomenon cannot be restrained,so the torque of propeller will also increase.