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对某一固定翼微型飞行器进行了桨翼气动干扰数值模拟研究,采用作用盘理论模拟真实桨盘的工作状态,通过时间平均稳态处理将非定常流场简化为准定常流场计算。利用FLUENT的用户自定义函数UDF实现作用盘前后压力、速度的变化。通过与无滑流影响下单独机身数值计算结果的比较,结果显示螺旋桨滑流延缓了机体上表面的气流分离,增强气流再附着能力,飞机的失速迎角增加2°,升力、阻力、俯仰力矩系数增加2%～5%,升阻比减小2%～3%。
A numerical simulation study on aerodynamic interference of a fixed-wing micro-aircraft is carried out. The working disk theory is simulated by the action disk theory, and the unsteady flow field is simplified to the quasi-steady flow field by time-averaged steady state processing. The use of FLUENT user-defined function UDF effect disk before and after the pressure and speed changes. Comparing with the numerical results of the single fuselage under the effect of no slip, the results show that the slipstream of the propeller slows the flow separation on the upper surface of the fuselage and enhances the airflow reattachment ability. The angle of attack of the airplane increases by 2 °, lift, drag, pitch Torque coefficient increased by 2% to 5%, lift resistance ratio decreased by 2% to 3%.