超空泡航行体纵向平面动力学行为的CFD分析

摘要

超空泡航行体稳定性及弹道特性的仿真研究是设计超空泡航行体控制和制导系统的基础。文章基于多相流URANS（Unsteady Reynolds Averaged Navier-Stokes）方程和刚体纵向平面运动学方程，建立了三维超空泡航行体动力学仿真模型，对纵向平面内超空泡航行体巡航状态的动力学行为进行了仿真研究。仿真结果表明，超空泡航行体在无控条件下仍具有一定的稳定性；尾部控制面可以有效缩短航行体达到稳定所需要的时间，并且能使航行体稳定于空泡中心构成理想的稳定模式。%Numerical simulation research on the stability of supercavitating vehicle and trajectory is the basis of designing control and guidance system of supercavitating vehicle. In this paper, based on the mul-tiphase flow URANS (Unsteady Reynolds Averaged Navier-Stokes) equations and the kinematical equation of the rigid body in the longitudinal plane, the three-dimensional dynamics simulation model of supercavi-tating vehicle is established. On this basis, the dynamic behavior of supercavitating vehicle is simulated in the cruising state. The results show that the supercavitating vehicle without control may still be stable to some extent, and fins can effectively decrease the time which the vehicles take to be stable and make the vehicle locate in supercavity as a stable motion mode.