螺旋桨旋转速度对机翼气动力影响的数值模拟

为了研究螺旋桨滑流中的旋转速度对机翼气动力的影响,分别采用非定常方法和桨盘理论两种方式对螺旋桨/机翼构型进行模拟。与非定常方法对比,桨盘理论足以模拟螺旋桨滑流对机翼的影响,并能降低计算要求,缩短计算时间。因此,采用桨盘理论研究桨盘扭矩载荷对应的旋转速度增量对机翼气动力的影响。计算结果表明,桨盘旋转速度对机翼升力影响不大,但是对零攻角时的机翼阻力存在特殊的影响。发现了这一影响,并对其原因进行了说明。

Numerical Simulation of Propeller Swirl Velocity Effects to Wing Aerodynamic Features

In order to research the propeller slipstream swirl velocity effects to the wing aerodynamic features,unsteady approach and actuator disk theory are adopted respectively.The geometric configuration is a propeller installed on the wing.Compared with the unsteady method,actuator disk theory is accurate enough to simulate the interactions of slipstream and wing with lower cost demand and less computational time.Thus,the simulations of swirl velocity increment corresponding propeller torque load are conducted using actuator disk theory.The results show that propeller swirl velocity has little effect on the wing lift while it has a special impact on the wing drag at 0° angle of attack.This impact has been found,and its causes have been explained.