利用雷诺平均可压缩N-S方程和可实现K-ε模型,对飞翼布局无人机进行了内外流场的气动耦合计算,研究分析了进排气系统对飞翼动布局气动特性的影响。数值模拟结果表明,进排气效应明显影响了前后机身一定范围内的压力分布,使得全机升力、阻力和俯仰力矩增加,纵向静安定度有所减小;另外,低速比高速时的影响尤为明显,低速时进排气效应使得最大升阻比降低4左右,而高速时最大升阻比降低2左右。 Based on the Reynolds average compressible N-S equation and the K-ε model, the aerodynamic coupling of the internal and external flow field of the flying wing UAV is studied. The influence of the intake and exhaust system on the aerodynamic characteristics of the flying wing is analyzed. The numerical simulation results show that the intake and exhaust effects obviously affect the pressure distribution within a certain range of the front and rear fuselages, which increases the lift, drag and pitching moment of the whole machine and decreases the vertical stability. In addition, the effects of low speed ratio and high speed ratio Especially, the effect of intake and exhaust at low speed reduces the maximum lift-drag ratio by about 4, while the maximum lift-drag ratio decreases about 2 at high speed.