摘要:针对特殊的旋翼倾转运动,建立了一个过渡状态的旋翼非定常气动力数值计算方法.为正确模拟旋翼倾转运动使桨叶受到的附加惯性力及哥氏力作用,重新推导了旋翼倾转时的桨叶气动力模型和挥舞运动方程;为了适合于旋翼倾转时的入流和气动力计算,入流模型中考虑了倾转运动引起的旋翼尾迹弯曲影响.应用建立的方法,首先进行了旋翼配平计算,以验证计算模型,并给出了倾转旋翼的操纵量.然后,着重计算了旋翼在倾转过渡时的拉力.俯仰和滚转力矩随倾转角的变化,分析了倾转飞行时的前飞速度.倾转时间等对旋翼气动力的影响,得出了一些新的结论.%A new method was developed for predicting the unsteady aerodynamic forces of a tiltrotor in tilting process. To consider rotor tilting motion and additional inertial and Coriolis forces, the blade flapping motion equation for tilting transitional flight was re-derived. The dynamic wake distortion effects were also included in the rotor inflow model for fitting the tiltrotor inflow and aerodynamic analysis in transitional flight. Using the developed method, the calculation on rotor trim was firstly carried out to give required control parameters and to validate the numerical method. Then, the variation of the rotor thrust, pitching and rolling moments with tilting angles was calculated. From the calculations, the effects of the forward velocity and tilting time on the unsteady aerodynamic forces of the tiltrotor were analyzed, and some new results were presented.