入水速度对冰孔约束下圆柱体倾斜入水过程的影响分析  

Influence of Water Entry Speed on Oblique Water Entry Process of a Cylinder under Ice Hole Constraint

作　　者：鹿麟[1,2] 杨哲 陈凯敏 程勇东 杨帅 LU Lin;YANG Zhe;CHEN Kaimin;CHENG Yongdong;YANG Shuai(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China;Chongqing Changan Wangjiang Industry(Group)Co.,Ltd.,Chongqing 401120,China)

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]重庆长安望江工业(集团)有限责任公司,重庆401120

出　　处：《水下无人系统学报》2024年第3期474-481,共8页Journal of Unmanned Undersea Systems

基　　金：国家自然科学基金项目(52201385).

摘　　要：针对极地环境下超空泡圆柱体入水问题,基于雷诺平均方程引入流体体积模型,结合重叠网格技术建立了冰孔约束下圆柱体入水数值仿真方法。在此基础上,开展不同入水速度下圆柱体穿越冰孔入水过程仿真,分析了圆柱体入水过程中的空泡演化与载荷特性。研究结果表明:冰孔约束限制了孔内水域的流动,进而改变了表面喷溅的状态及空泡壁的形态,以至延迟了空泡表面闭合时间。随着入水速度的增大,冰孔约束对空泡形态的限制作用基本一致,圆柱体头部出现了更大范围的高压区域,且呈现出非对称分布;冰孔约束增大了圆柱体入水冲击载荷,使得圆柱体水下速度加快衰减,并促使圆柱体偏转角度大于无冰工况。研究结果可为极地超空泡武器入水稳定性提供参考。For the water entry problem of supercavitating cylinders in polar environments,a numerical simulation method for the water entry of the cylinder under ice hole constraint was established based on the Reynolds time-averaged Navier-Stokes equations,volume of fluid model,and overlapping mesh technique.On this basis,the simulation of the water entry process of the cylinder through the ice hole at different water entry speeds was carried out,and the cavity evolution and load characteristics of the cylinder in the water entry process were analyzed.The results show that ice hole constraint restricts the flow of water inside the ice hole,which in turn alters the surface splashing and the shape of the cavity wall,thus delaying the surface closing of the cavity.The limiting effect of the ice hole constraint on the cavity shape is essentially the same as the water entry speed increases.The cylinder head appears to have a larger area of high pressure,showing an asymmetric distribution.In addition,the ice hole constraint increases the water entry impact load of the cylinder,which accelerates the underwater speed decay of the cylinder and contributes to a larger deflection angle of the cylinder than in the ice-free condition.The research results can provide some reference for the water entry stability of polar supercavitating weapons.

关 键 词：超空泡 冰孔约束 倾斜入水 入水冲击载荷 空泡演化 

分 类 号：TJ630[兵器科学与技术—武器系统与运用工程] U647[交通运输工程—船舶及航道工程]