基于尾流数值模拟的受油机气动影响建模研究

Research on aerodynamic effect modelling of receiver based on numerical simulation of wake vortex

为解决空中加油过程中加油机尾流场对受油机造成的扰动问题,结合计算流体力学和等效气动效应法进行了受油机尾流干扰下的气动影响建模研究。采用计算流体力学进行了空中加油机尾流场的数值模拟,得到了精确的尾流速度分布数据。利用加权平均和逐步积分方法将尾流对受油机的不均匀气动作用转化为受油机运动方程可直接使用的等效风速度和风梯度,进而计算出受油机所受到的力和力矩系数,完成受油机气动影响建模。通过仿真验证了该方法的可行性和有效性。

To solve the disturbance problems of receiver aircraft caused by tanker＇ s wake in aerial refueling, the aerodynamic model of the receiver is derived by combination of computational fluid dynamics and equivalent aerodynamic effects. The computational fluid dynamics is used to simulate the wake vortex of tanker, and the accurate wake velocity distribution is acquired. The step by step integration and weighted averaging method are used to convert the non-uniform aerodynamic effect acting on receiver by wake to the equivalent wind speed and wind gradient which can be directly used in the motion equation of the receiver. Then calculate the force and moment coefficient of the receiver so as to complete the aerodynamic effect modeling. Effectiveness and feasibility of the proposed method is proved by computer simulation.