波浪相位对航行体出水姿态影响数值仿真研究

Research on Gesture of Vehicle Exiting from Different Phase Position of Wave by Numerical Simulation Method

水下航行体的出水过程是一个穿越不同介质面,运动速度等参数剧烈变化的非定常、非线性气液两相运动的过程。在此过程中将引起流体动力和运动载荷的大幅变化,从而影响水下航行体的出水姿态、运动稳定性以及在空中的正常飞行等问题。为了准确的对上述问题进行深入研究,提出了依据Stokes波理论运用边界条件造波方法对海面波浪环境进行了数值仿真;并基于RANS方程,运用CFD动网技术实现了对水下航行体出水运动的数值仿真,重点研究了出水相位的改变对航行体出水姿态的影响。计算得出了在相同波浪参数条件下(浪高、周期、波长)对航行体出水姿态影响最严重的波浪相位。研究结论为水下航行体出水弹道的参数设计提供了理论参考。

The underwater vehicle exiting from wave is an unsteady and non -linear moving process. It contains passing through the different material faces and the dramatically changed motion parameters. The fluid dynamics and dramatic loading change can impact the gesture of underwater vehicle exiting from wave and moving in the air. Direct at these problem, this paper made use of boundary condition to simulate the Stokes wave theory firstly. On this foundation, based on the RANS equation, we made use of dynamic mesh technique to simulate the gesture of underwater vehicle exiting from wave, analyzed the influence by the changed of the phase position of wave particularly, and obtained the phase position of wave that influence the gesture of underwater vehicle most seriously on the same wave parameter. The research conclusion can make reference to the parameter design for the trajectory of underwater vehicle.