Underwater acoustics and cavitating flow of water entry

被引：11
作者：
Shi Honghui
Kume Makoto
机构：
[1] Chinese Academy of Sciences,State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics
[2] Zhejiang University of Sciences,College of Mechanical Engineering and Automatic Control
[3] Nagoya Institute of Technology,Department of Mechanical Engineering
来源：
Acta Mechanica Sinica | 2004年 / 20卷 / 4期
关键词：
water entry; underwater acoustics; supercavitation; PVDF hydrophone; high-speed photography;
D O I：
10.1007/BF02489375
中图分类号：
学科分类号：
摘要：
The fluid mechanics of water entry is studied through investigating the underwater acoustics and the supercavitation. Underwater acoustic signals in water entry are extensively measured at about 30 different positions by using a PVDF needle hydrophone. From the measurements we obtain (1) the primary shock wave caused by the impact of the blunt body on free surface; (2) the vapor pressure inside the cavity; (3) the secondary shock wave caused by pulling away of the cavity from free surface; and so on. The supercavitation induced by the blunt body is observed by using a digital high-speed video camera as well as the single shot photography. The periodic and 3 dimensional motion of the supercavitation is revealed. The experiment is carried out at room temperature.
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页码：374 / 382
页数：8
相关论文
共 16 条
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