Numerical investigation on hydrodynamic characteristics of underwater vehicle in the vertical launch tube

Abstract:

The multiphase flow characteristics and hydrodynamic evolution during the rise of underwater vehicle in the vertical launch tube have been researched with numerical simulation method. The multiphase mixture model, Singhal cavitation model and a standard k-8 turbulence model with a dynamic mesh technique were adopted to solve RANS equation in conjunction. The fluid-solid coupling problem of moving boundary of missile body and multiphase flow field was solved and the axial symmetric gravity flow field and hydrodynamic character- istics of underwater vehicle were derived by using the numerical simulation. The results show that the gaseous fluid affects on trajectory of underwater vehicle and hydrodynamic load. The volatility reason of different pressure coefficient and viscous force coefficient and toll force coefficient were derived by analyzing simulation results