空射导弹发射初始弹道数值仿真

导弹从载机上发射时,载机对导弹的流场存在干扰,从而影响导弹在发射初始阶段的姿态和运动轨迹。为了确定导弹的初始弹道参数,本文利用CFD商业软件Fluent6.1计算导弹发射时的非定常流场,并通过该软件的接口嵌入导弹的六自由度弹道方程,同时计算了导弹在载机流场干扰下的非定常气动力和初始弹道。计算结果清晰地表现出导弹与载机的分离过程和载机流场的干扰形式,并可估算出载机的流场干扰范围。

The initial trajectory numerical simulation of air launched missile

When a missile is launched from aircraft,its flow field will be disturbed,so its initial attitude and trajectory are influenced.To determine its initial trajectory parameters,this paper uses CFD software to compute the unsteady flow field of the missile at the beginning of launch from aircraft and embed six degree of freedom ballistic equation through the software's interface.So,we have computed the missile's both unsteady aerodynamic force and initial trajectory at the same time.The result shows clearly the separate course of aircraft and missile,and an interfered flow field range can be estimated assumably.