A Study on the Tube-exit Cavity Surrounding Submarine-launched Missile

Abstract

The gas-steam ejection dynamic system is usually employed by submarine launched missile. In the separating process of missile tail and canister outlet, cavity formed by Interaction between gas and water has influence on the load of launch platform and missile trajectory. The mixture multiphase flow model, RNG k-ε turbulence model combined with the dynamic mesh model were adopted to simulate the tube-exit cavity and missile trajectory. The results show that in the process of missile bottom leaving tube, the high pressure gas pours out and forms cavity in missile bottom. With the missile moving and hydrostatic pressure impacting, the cavity will expand, shrink and break and its effects on trajectory of missile and loads on deck are presented. In addition, the natural cavitation of missile shoulder because of high speed movement of missile is analyzed.