Three Dimensional Numerical Simulation On Vertical Launch Of Underwater Vehicle

The environment of submarine-launched vehicle is extremely intricate, as multiple influential factors involves in the whole process, the research value is significant. In the past, the studies mainly focus on two dimension axis symmetry model, ignore the differences between 2D and 3D in tail cavity retro-reflection, ventilation and cavity evolution. This article which is aimed at vehicle hydrokinetic characteristics influenced by different ventilation factors, launches three dimension numerical simulation and study. The following is the detail contents:Based on numerical simulation method of RANS, the passage uses VOF multiple phases model and k ?? turbulence model, takes three dimension numerical simulation and study on the underwater launch process of submarine-launched vehicle. The article analyzes the development and evolution process of ventilation cavity, tail cavity retroreflection disciplines, and vehicle hydrokinetic characteristics which is influenced by submarine velocity under different ventilation parameters and launch parameters.The research is aimed at ventilation vehicle hydrokinetic characteristics, achieves the cavity development, tail cavity retro-reflection and the variation laws of pressure on the surface of vehicle.The research is launched on the trajectory and dynamic characteristics of vehicle under the influence by submarine velocity, obtains the laws of cavity development, angle of pitch out of water and the loads under different launch velocity, submarine velocity and the launch deep, a discussion is also spread on different ventilation styles.