高速气流作用下两级飞行器动态分离过程研究

为研究超声速气流对分离过程的影响，开展了两级飞行器高速气流下动态分离过程的数值模拟，建立了高速气流环境下含空气阻力内弹道模型；基于嵌套网格技术，分析了不同高速气流来流速度及攻角下前级的气动与运动特性，得到了前级典型气动参数、动态分离速度及静动态分离速度差异变化规律.结果表明:在本文研究范围内，静动态分离速度差异在不同高速气流来流速度和攻角条件下变化明显.随高速气流来流速度增大，前级分离结束时刻的阻力系数、升力系数和动态分离速度减小，速度差异因子增大；随攻角增大，阻力系数、升力系数和分离速度增大，速度差异因子减小. 

Dynamic Separation Process of Tandem Flyers Under High Velocity Airflow

In order to study the influence of supersonic flow on the separation process of flyers,numerical simulation of the dynamic separation process of tandem flyers was carried out. The internal ballistic model with air resistance in high-speed airflow environment was established. The dynamic separation processes of the front flyer under different inflow velocities and attack angles were analyzed. The typical aerodynamic parameters,dynamic separation speed and difference between dynamic and static separation speed of the front flyer were obtained. The results show that,the difference between dynamic and static separation speeds varies significantly under different inflow speeds and attack angles. The drag and lift coefficient and dynamic separation speed decrease as inflow velocity increases. The speed difference factor increases as inflow velocity increases. The drag and lift coefficient and dynamic separation speed increase as the attack angle increases. The speed difference factor decreases as the attack angle increases.