航行体出水过程头部流场载荷特性分析  

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

作　　者：尤天庆[1] 张嘉钟[1] 王聪[1] 曹伟[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《北京航空航天大学学报》2011年第5期610-614,共5页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目(10802026);中国博士后科学基金资助项目(20080440884)

摘　　要：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.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 cavity,can cause more severe flow field change and produce massive pressure on the hull of vehicle.The result also indicates the flow field of water-exit process with pitching angle is asymmetric which forms the powerful moment applied on the vehicle.And the pitching angle has a great impact on the variation of moment.

关 键 词：空化 出水 多相流 水下航行体 

分 类 号：TJ760.9[兵器科学与技术—武器系统与运用工程]