Simulation of pressure field near canister outlet for underwater-launched emulated missile

The fluid field near canister outlet for underwater-launched emulating missile was simulated by using a 3D symmetric model based on dynamic meshing technology and VOF with phase transfer. The characteristics of bubble pulsation near canister outlet, pressure-time curves and moment-time curve over the cover were achieved through several simulation cases; also effects of water compressibility and the initial temperature of work gas on load characteristics over cover system were analyzed and compared. The simulation results agreed with the test data very well in several key bubble pulsation characteristics. The simulations also show that the initial temperature of work gas has great effect on the load pulsation duration over the cover and water compressibility is an un-negligible factor for simulation creditability. It provides a new kind of reference standard for load analysis of the cover system and the cover system design.