大攻角水下航行体侧面空化特性的数值分析  

Numerical Analysis on the Characteristics of Side Cavitation Around Submerged Vehicle With Large Attack Angle

作　　者：陈瑛[1] 鲁传敬[1,2] 郭建红[1] 曹嘉怡[1] 

机构地区：[1]上海交通大学工程力学系,上海200240 [2]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《弹道学报》2011年第1期45-49,共5页Journal of Ballistics

基　　金：国家自然科学基金重点项目(10832007);上海市重点学科建设项目(B206)

摘　　要：为了考察水下航行体在大攻角下出现的侧面空化现象,建立了基于输运方程型空化模型和非线性涡粘湍流模式的空泡流数学模型和数值算法,自主开发了适用于复杂流场的三维空泡流计算程序,对水下航行体空泡流进行了数值模拟.计算得到了与试验一致的空泡形态,模拟出了实验所发现的大攻角航行体侧面空化的现象及其变化规律.航行体横截面内速度分布及表面压力分布的定量分析结果表明,在大攻角条件下侧面空化攻角增大到一定程度时,横向速度分量足够大将导致空化区范围剧烈增大,侧面空泡突然爆发.To investigate the side cavitation phenomenon occurring around submerged vehicle at large attack angle,the mathematical model and numerical methods for cavitating flow based on the transport-equation typed cavitation model and non-linear eddy-viscosity turbulence model were established.A computer code for the computation of complicated three-dimensional cavitating flow was developed.The cavitating flow around submerged vehicle was numerically simulated.The computed cavity shapes are consistent with experimental ones,and the side cavitation phenomenon,which was observed in experiments on submerged vehicle with large attack angle,was successfully simulated.The velocity distribution on cross section and the pressure distribution on vehicle surface,were quantitatively analyzed.The result shows that under the conditions of large attack angle,the enough component of lateral velocity can bring about the sharp increase of cavitation area while the attack angle increasing to a certain extent.

关 键 词：水下航行体 空泡 攻角 数值模拟 

分 类 号：TJ762.4[兵器科学与技术—武器系统与运用工程] O359.1[理学—流体力学]