鱼雷小角度入水过程仿真

针对鱼雷小角度入水问题，采用多相流混合模型及动网格方法，分析了鱼雷在小入水角条件下的入水空泡形成过程，以及雷体外形与入水空泡壁的相互作用特点，获得了不同入水角、入水攻角条件下俯仰力矩及力矩作用点位置在入水过程中的变化规律。仿真结果表明，减小入水攻角、延迟动力点火将有助于避免发动机失速、鱼雷跳水等异常现象，采用泵喷射推进器有利于鱼雷入水过程的稳定。

Simulation on Small-Angle Water Entry Process of Torpedo

The multiphase mixture model and the dynamic mesh method are used to analyze the forming process of cavity in torpedo water entry with small angle, and the characteristics of interaction between torpedo shape and water entry cavity wall to achieve the change rules of pitch torque and torque action point for different water entry angle and water entry angle of attack. Simulations show that reducing angle of attack or delaying ignition can avoid such abnormal phenomena as engine＇s stalling and torpedo＇s broaching, and pump jet configuration facilitates stable water entry process of a torpedo.