锥头圆柱体高速入水空泡数值模拟

马庆鹏; 魏英杰; 王聪; 曹伟

锥头圆柱体高速入水空泡数值模拟

哈尔滨工业大学航天学院, 哈尔滨 150001

基金项目: 哈尔滨市科技创新人才专项基金资助项目（2013RFLXJ007）；中央高校基本科研业务费专项资金资助项目（HIT.NSRIF.201159）

详细信息

中图分类号: TV131.2
计量
- 文章访问数: 1628
- HTML全文浏览量: 292
- PDF下载量: 544
- 被引次数: 0
出版历程
- 收稿日期: 2013-03-29
- 网络出版日期: 2014-02-20

Numerical simulation of high-speed water-entry cavity of cone cylinder

School of Astronautics, Harbin Institute of Technology, Harbin 150001, China

摘要

摘要: 采用流体体积法（VOF，Volume of Fluid）多相流模型，引入动网格技术，对锥头圆柱体垂直自由高速入水问题开展了数值模拟研究，分析了航行体入水后速度及入水空泡形态的发展规律，并与文献基于能量守恒定律的理论结果进行比较，两者吻合较好.研究结果表明，高速入水初期，结构受到极高的冲击载荷，导致速度迅速衰减；随着入水深度的增加，空泡不断拉长并向径向扩张，空泡内空化现象明显，空泡内混合相对空泡壁及空泡分离点附近压力分布影响显著.对于不同速度入水的研究结果表明，入水速度越高，航行体头部压力峰值越大，相同时刻入水空泡最大直径也越大.
- 流体力学 /
- 高速入水 /
- 空泡 /
- 锥头圆柱体 /
- 数值模拟
Abstract: Numerical simulation for modeling the cavity formation induced by the high-speed water-entry of a cylinder body with a cone head was performed. Volume of fluid (VOF) model and dynamic mesh were introduced for the multiphase flow and the movement of the body. The velocity attenuation and induced cavity shape were obtained with an initial velocity of 500 m/s. Good agreements were obtained compared with the theoretical results. During the early period of the water entry, the penetrating velocity decreased rapidly because of the high impact load affected on the cone which can be thousand times atmospheric pressure. The maximum cavity diameters of the water-entry cavity get larger when the initial velocity is higher. As the rigid body moves deeper, there is more vapor than air; the multiphase affects the stability of the cavity markedly.
- fluid mechanics /
- high-speed water-entry /
- cavity /
- cone cylinder /
- numerical simulation

HTML全文

参考文献(12)

[1]	Worthington A M, Cole R S.Impact with a liquid surface studied by the aid of instantaneous photography[J].Philosophical Transactions of the Royal Society, 1900, 194(A):175-200
[2]	Gilbarg D, Anderson R A.Influence of atmospheric pressure on the phenomena accompanying the entry of spheres into water[J].Journal of Applied Physics, 1948, 9(2):127-139
[3]	May A, Woodhull J C.Drag coefficients of steel spheres entering water vertically[J].Journal of Applied Physics, 1948, 19(12):1109-1121
[4]	May A, Woodhull J C.The virtual mass of a sphere entering water vertically[J].Journal of Applied Physics, 1950, 21(12): 1285- 1289
[5]	May A.Effect of surface condition of a sphere on its water-entry cavity[J].Journal of Applied Physics, 1951, 22(10):1219-1222
[6]	National Defense Research Committee.Mathematical studies relating to military physical research[R].AD221604, 1946
[7]	Lee M, Longoria R G, Wilson D E.Cavity dynamics in high-speed water entry[J].Physics of Fluids, 1997, 9(3):540-550
[8]	何春涛, 王聪, 魏英杰, 等.圆柱体垂直入水空泡形态试验研究[J].北京航空航天大学学报, 2012, 38(11):1542-1546 He Chuntao, Wang Cong, Wei Yingjie, et al.Vertical water entry cavity of cylinder body[J].Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(11):1542-1546(in Chinese)
[9]	王聪, 何春涛, 权晓波, 等.空气压强对垂直入水空泡影响的数值研究[J].哈尔滨工业大学学报, 2012, 44(5):14-19 Wang Cong, He Chuntao, Quan Xiaobo, et al.Numerical simulation of the influence of atmospheric pressure on water-cavity formed by cylinder with vertical water-entry[J].Journal of Harbin Institute of Technolody, 2012, 44(5):14-19(in Chinese)
[10]	Sedov L I. Two-dimensional problems in hydrodynamics and aerodynamics[M].New York:John Wiley & Sons Inc, 1965: 1- 427
[11]	Lundstrom E A. Fluid dynamic analysis of hydraulic ram[R].NWC TP 5227, 1971
[12]	May A. Water entry and the cavity-running behavior of missiles[R].AD A020429, 1975