基于计算流体力学的“虚拟飞行”技术及初步应用

STUDY ON CFD-BASED NUMERICAL VIRTUAL FLIGHT TECHNOLOGY AND PRELIMINARY APPLICATION

以动态混合网格技术为基础,通过耦合求解刚体动力学方程、流体力学控制方程以及飞行控制律,建立了适用于飞行器"虚拟飞行"过程研究的一体化数值模拟技术.通过典型的外挂物投放算例对流体力学控制方程/动力学方程的耦合算法进行了测试,并对某导弹的姿态角控制过程、过载控制过程以及变马赫数条件下的控制过程进行了数值模拟,得到了与实验非常一致的结果.这些算例证明该一体化算法已经初步具备了针对复杂飞行器"数值虚拟飞行"的应用能力.

Based on dynamic hybrid mesh and the coupling solver of N-S equations, rigid body dynamic equations and flight controlling law, a CFD-based numerical virtual flight technique is presented. A wing/store separation case is examined to validate the coupling solver. Finally, preliminary applications of this numerical method are carried out,including the attack angle controlling process, the acceleration load controlling process of a missile with and without Mach number varying. These cases demonstrate the robustness and accuracy of the present solver.