Collapse characteristics of the cavitation bubble near free surface

被引：0
|
作者：
Zhang Y. [1 ]
Xu W. [1 ]
Zhang Q. [1 ]
Zhai Y. [1 ]
机构：
[1] State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu
来源：
Xu, Weilin (xuwl@scu.edu.cn) | 1600年 / International Research and Training Center on Erosion and Sedimentation and China Water and Power Press卷 / 48期
关键词：
Air bubble; Cavitation bubble; Collapse characteristics; Direction of collapse; Free surface;
D O I：
10.13243/j.cnki.slxb.20160449
中图分类号：
学科分类号：
摘要：
Study of collapse characteristics of the cavitation bubble near free surface has important significance in knowing cavitation erosion mechanism in water conservancy and hydropower project. To further understanding collapse characteristics of the cavitation bubble near free surface, experiments the spark-induced cavitation bubbles were carried out and the results show that:(1) Cavitation bubbles near free surface always deviate from the free surface when collapsing, the critical condition of deviating from the free surface is that the distance between the cavitation bubble and the free surface is about five times of the maximum radius of the cavitation bubble. The larger the size of the cavitation bubble or the closer the cavitation bubble away from the free surface, the more obvious the phenomenon will be. (2) Double cavitation bubbles near free surface collapse towards each other and fuse together and the fusion body deviates from the free surface. (3) Under the influence of the free surface and the air bubble, the direction of collapse of the cavitation bubble is vector sum of the respective effect of the free surface and the air bubble. A quantitative knowledge of cavitation bubbles near free surface was developed in this study and collapse directions of cavitation bubbles could be predicted under certain conditions. © 2017, China Water Power Press. All right reserved.
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页码：127 / 134
页数：7
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