乘波体飞行器气动布局优化设计

Aerodynamic Shape Optimization of a Wave-Rider Vehicle

摘要:

由于具有高升阻比,乘波体是高超声速巡航飞行器气动布局的首选方案。文章在求解圆锥激波流场精确解的基础上,应用流线追踪方法,建立了乘波体飞行器气动布局的参数化模型。在此基础上,对飞行器的气动力特性进行了估算。最后,以气动布局参数为设计变量,升阻比最大化为设计目标,对乘波体飞行器进行气动布局优化设计,应用改进的粒子群优化算法(Particle Swarm Optimization,PSO),对优化模型进行求解,得到了优化的气动布 局设计方案。

Abstract:

The best aerodynamic shape for hypersonic cruis vehicle is the waverider which has a high lift-to-drag ratio. The accurate solutions of the flow field with conical shock wave were evaluated by Taylor-Maccoll equation, and then the parametric geometry of the wave-rider vehicle was generated with the reverse design method by tracking the streamlines of the flow field. With the flow solutions behind the conical shock wave, the reference temperature method was applied to compute the aerodynamic force coefficients of the wave-rider vehicle. The geometric parameters of the wave-rider vehicle were optimized with respect to the lift-to-drag ra. tio. In order to enhance the computation efficiency and the local searching ability of the optimization procedure, the improved Particle Swarm Optimization(PSO) algorithm was employed to obtain the optimal aerodynamic con. figuration of the waverider vehicle with the maximized lift-to-drag ratio.