Abstract：The cavity mixed with air will collapse during water exit, which leads to the dramatic change of flow field. The cavity collapse property has been analyzed using spherical air-involved bubble model. Then, based on homogenous multiphase flow model, numerical simulation of the cavity collapse filled with air has been conducted. The result shows that the rebound phenomenon will occur in the cavity water exit collapse process, and causing strong impact on vehicle surface. The analysis also presents that cavity inside pressure rising causes the growing of cavity size and reduces the inside and outside pressure difference, which eases the water impact.
1 Knapp R T, Daily J W, and Hammitt F G. Cavitation. Mcgraw-Hill book company, 1970: 63-139.
2 Waugh J. G. and Stubstad G. W. Water-exit behavior of missiles part 1. preliminary studies.[R] Underwater Ordance Department, China Lake, California, 1961.
3 权晓波，李岩，魏海鹏等. 航行体出水过程空泡溃灭特性研究[J]. 船舶力学. 2008, 4(12): 545-549
4 Christopher Earls Brennen. Cavitation and Bubble Dynamics[M]. Oxford University Press 1995.
5 P.R.Williams, P.M.Williams, and S.W.J.Brown. A study of liquid jets formed by bubble collapse under shock waves in elastic and Newtonian liquids[J]. J. Non-Newtonian Fluid Mech. 1998, 76: 307-325.
6 A.M.Zhang, X.L.Yao, and L.H.Feng. The dynamic behavior of a gas bubble near a wall[J]. Ocean Engineering. 2009, 36: 295-305.
7 Luo Jing, and Li Jian. Two-dimensional Simulation of the collapse of vapor bubbles near a wall[J]. Journal of Fluids Engineering. 2008, 130: 091301-1.
8 Liu Zhiyong, Yi Shuqun, Yan Kai. Numerical Simulation of Water-Exit Cavity[C]. //Fifth International Symposium on Cavitation, Osaka, Japan, 2003: CAV03-0S-7-018.
9 王一伟, 黄晨光, 杜特专, 等. 航行体有攻角出水全过程数值模拟[J]. 水动力学研究与进展, 2011, 26: 48-57.
10 Harrison M. An experimental study of single bubble cavitation noise[J]. The Journal of the Acoustical Society of America, 1952, 24(6): 776-782.
