Numerical simulation of subsonic and transonic water entry with compressibility effect considered

被引：9

作者：

Wu, Qin ^{[1
]}

Wang, Kai ^{[1
]}

Kong, Decai ^{[3
]}

Zhang, Jiayue ^{[4
]}

Liu, Taotao ^{[1
,2
]}

机构：

[1] Beijing Inst Technol, Sch Mech Engn, 5 South Zhongguancun St, Beijing 100081, Peoples R China

[2] Beijing Inst Technol, Chongqing Innavat Ctr, Chongqing 401120, Peoples R China

[3] China Acad Launch Vehicle Technol, Syst Engn Div, Beijing 100076, Peoples R China

[4] China Acad Aerosp Aerodynam, 17 West Yungang Rd, Beijing 10074, Peoples R China

来源：

OCEAN ENGINEERING | 2023年 / 281卷

关键词：

Water entry; Cavity; Subsonic; Transonic; Compressibility; CAVITY DYNAMICS; IMPACT; PRESSURE; EMPHASIS; SPHERES; FORCES; FLOW;

D O I：

10.1016/j.oceaneng.2023.114984

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

The purpose of this study is to analyze the subsonic and transonic water entry of the axisymmetric body with compressibility effect considered. The water-entry processes of axisymmetric body are numerically investigated, with Tait state equation and energy equation used to describe the compressibility of the liquid. Reasonable agreement has been obtained between the numerical results and the experimental measurements of trajectory, velocity and acceleration. The cavity evolution and dynamic characteristics of subsonic cases are investigated for vertical and oblique water-entry. The results show that the maximum drag coefficient of the oblique water entry is lower, and it is affected by a large moment which causes pitch angle and trajectory inclination angle to change significantly. In the oblique transonic conditions, the effect of compressibility of the liquid on the dynamic flow characteristics is analyzed. On this basis, the influence of entry angle on the hydrodynamic characteristics is investigated. It is concluded that the water-entry angle has a more significant influence on the trajectory characteristics.

引用

页数：15

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