Abstract
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.
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Project supported by the National Basic Research Development Program of China (973 Program, Grant No. 2013CB035905), the National Natural Science Foundation of China (Grant Nos. 51179114, 51409180).
Biography: Ya-lei Zhang (1988-), Male, Ph. D.
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Zhang, Yl., Xu, Wl., Zhang, Fx. et al. Collapsing characteristics of gas-bearing cavitation bubble. J Hydrodyn 31, 66–75 (2019). https://doi.org/10.1007/s42241-018-0094-6
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DOI: https://doi.org/10.1007/s42241-018-0094-6