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为研究倾转涵道动力装置在倾转过渡阶段的非定常气动力,使用基于滑移网格技术的非定常计算方法,利用基于内场信息和叶素理论的压力盘模型模拟风扇螺旋桨,通过求解Navier-Stokes(N-S)方程,对涵道风扇俯仰拉起过程进行数值模拟.结果表明:在倾转过程中涵道风扇非定常气动力的迟滞特性明显,俯仰角速度延迟了流场分离,增加了涵道风扇的升力和阻力;低速飞行时,涵道风扇在整个倾转过渡阶段气动性能优良;在高速大迎角飞行时,涵道风扇气动性能恶化,俯仰力矩曲线紊乱,不利于进行倾转过渡飞行.
In order to study the unsteady aerodynamic force of tilting tunnel power plant in the transitional phase of tilting, a non-steady-state calculation method based on slip-grid technique was used to simulate the fan propeller by using the pressure plate model based on the infield information and the blade element theory Navier-Stokes (NS) equations are solved to simulate the fan-up process of ducted fans.The results show that the hysteresis characteristics of unsteady aerodynamics of ducted fans during tilting are obvious, and the pitch velocity delays the flow field separation and increases The ductile fan’s aerodynamic performance is deteriorated and the pitching torque curve is disordered during the flight at high speed and high angle of attack, Turn the transition flight.