Collapsing characteristics of gas-bearing cavitation bubble  

作　　者：Ya-lei Zhang Wei-lin Xu Fa-xing Zhang Qi Zhang 

机构地区：[1]State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Journal of Hydrodynamics》2019年第1期66-75,共10页水动力学研究与进展B辑（英文版）

基　　金：the National Basic Research Development Program of China (973 Program,Grant No.2013CB035905);the National Natural Science Foundation of China (Grant Nos.51179114,51409180).

摘　　要：The cavitation is directly related to the safety of many large water conservancy projects.There are two types of cavitation bubbles,one is generated by the gas nucleus,called the non gas-bearing cavitation bubble,and another is generated by the gas bubble,called the gas-bearing cavitation bubble.They have significantly different collapsing characteristics.This paper studies the cavitation bubbles,generated by a high voltage pulse bubble generation system,and discusses the gas-bearing cavitation bubble's characteristics a from the aspects of the collapse process,the cycle,the size and the collapse strength.It is shown that:(1) the collapse of the gas-bearing cavitation bubbles can be divided into two types:the centripetal collapse and the bisected collapse,(2) the cycle period and the size of the gas-bearing cavitation bubble increase significantly,and the increase norm has a certain relationship with the bubble diameter ratio,(3) the collapse strength of the gas-bearing cavitation bubble decreases significantly.The larger the bubble diameter ratio,the greater the effect will be.

关 键 词：CAVITATION gas-bearing CAVITATION bubble COLLAPSE cycle COLLAPSE strength 

分 类 号：O3[理学—力学]