航行体出水过程头部流场载荷特性分析

航行体高速出水过程中流场变化剧烈且复杂,为研究其水动力载荷变化,采用均质多相流模型及空化模型,开展了出水过程的数值模拟研究.通过数值模拟分析了不同头部形状及出水攻角对航行体出水过程流场的影响.分析结果表明:空化性能较强的头形能产生头部空泡,并在穿越水面时溃灭,引起较为强烈的流场变化并产生较高压强作用于航行体壁面.而空泡溃灭过程也会因头形的不同而略有差别.有攻角出水时空泡溃灭呈现非对称性,因此形成了较大的力矩.而力矩的变化情况也受攻角影响较大. 

Characteristic analysis of flow load around head during vehicles exit of water

During water-exit of underwater vehicle,the violent change of flow field is very complex.In order to investigate the variation of hydrodynamic load,the water-exit of underwater vehicles was simulated by a viscous flow solver with homogeneous multiphase flow model and cavitaion model.The effect of different head shape and pitching angle on the water-exit flow field was analyzed by the numerical method.The analysis result indicates that the head shape with stronger cavitation capability,which maintains local ...