基于尾流效应的编队飞行优化分析

针对如何利用前机尾涡的上洗气流来达到减小后机飞行阻力的问题,进行了基于尾流效应的编队飞行优化分析。首先,通过分析后机在尾涡上洗气流中的受力情况,建立了尾流效应相关模型;然后,通过计算诱导滚转力矩系数评估后机飞行的安全性,通过阻力系数的变化判定诱导减阻效果;最后,建立多目标优化评价模型,以后机的安全性和诱导减阻效果为优化目标来确定后机在编队飞行中的最佳位置。研究结果表明,最佳编队位置并不是固定的,飞行高度、飞行速度等外部因素都会对编队飞行中后机的最佳编队位置产生一定的影响。

Analysis of wake effect based formation flight optimization

How to use the wake vortex up wash of the forward aircraft to reduce the flight resistance of the following aircraft, the formation flight optimization analysis based on wake effect is carried out. Firstly, the stress of the aircraft in the wake vortex up wash is analyzed, and the model of wake vortex is established. Secondly, the flight safety of following aircraft is evaluated by calculating the coefficient of induced roll moment. The effect of induced drag reduction is determined by the change of drag coefficient. Finally, a multi-objective optimization evaluation model is established. The safety and drag reduction effect of the following aircraft are optimized to determine the best position of the following aircraft in formation flight. The study results show that the optimal formation position is not fixed, and the external factors such as flying altitude and flying speed will have a certain influence on the optimal formation position of the following aircraft in formation flight.