气泡弹性对同心筒水下发射影响研究

On the effect of bubble elasticity to sub-launch process using concentric canister launcher

潜射导弹自同心筒装置发射过程中在筒口处会形成燃气泡,由于气泡在水下的弹性效应,水气耦合作用导致气泡周期性地膨胀压缩,会对导弹弹道参数、受载特性产生一定影响。以CFD为技术手段,建立了导弹水下发射动态仿真模型,通过数值模拟获得了发射过程中多相流场、导弹弹道参数及受力的时间历程曲线,分析了气体弹性效应对参数变化的影响;并针对发射深度及其发射艇速对气泡弹性效应的影响进行了仿真分析,给出了其影响规律。仿真方法和结果对工程研究有一定参考价值。

A bubble will come into existence at the tube outlet during the launch process of sub-launched missile being launched from a concentric canister launcher. Due to the elastic effect,the bubble underwa- ter will expand and be compressed periodically,and it will affect the motion parameters and loads acting on the missile. In aid of the CFD technique,a dynamic simulation model of the launch process of the sub- launch missile was set up, through which the multiphase flow field, the motion parameters and loads with time were obtained, furthermore, the effects of bubble elastic feature to the parameters were analyzed. The influences of launch depth and submarine velocity to the bubble elastic features were also investiga- ted, followed by the effect law. The simulation method and results have a certain reference value for engi- neering studies.