攻角对空空导弹与载机分离过程的影响

INFLUENCES OF ANGLES OF ATTACK DURING THE SEPARATION OF AN AIR-TO-AIR MISSILE FROM THE AIRCRAFT

为了保证空空导弹与载机的安全、稳定分离,对不同攻角下空空导弹与载机的分离过程进行研究具有重要意义。基于对计算流体力学控制方程与六自由度(6DOF)外弹道运动方程的耦合求解,对不同攻角下空空导弹与载机的分离过程进行了数值计算。结果表明:攻角对分离流场、导弹气动参数及导弹的运动规律都有影响。攻角阻碍导弹与载机分离,且攻角越大阻碍能力越强,导弹俯仰越剧烈。攻角较小时(α=0o、5o),导弹能够安全稳定的与载机分离;攻角较大时(α=10o、15o、20o),导弹与载机间距较小,对导弹的安全稳定分离产生威胁。

In order to ensure the safe separation of an air-to-air missile from the aircraft,it is of great importance to study the process of missile separation under different angles of attack.Based on the coupling solutions of the computational fluid dynamics governing equations and the six-degree of freedom(6DOF)exterior ballistic equations,the missile separating process of a typical air-to-air missile at different angles of attack have been calculated numerically.The results show that the angle of attack has influence on the separation flow field,the aerodynamic parameters of the missile,and the movement of the missile.The angle of attack has an effect of blocking the separation of the missile from the aircraft.A greater angle of attack leads to a stronger hindrance and an more intense missile pitching.When the angle of attack is small(α=0o,5o),the missile is safely and steadily separated from the aircraft.When the angle of attack is large(α=10o,15o,20o),the distance between the missile and the aircraft is small,which is a threat to the safe and stable separation process of the missile