期刊
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES
卷 52, 期 7, 页码 1974-1980出版社
SCIENCE PRESS
DOI: 10.1007/s11431-009-0132-2
关键词
cavitation bubble; ultrasonic cavitation; erosion pit; high-speed photography
资金
- National Basic Research Program of China (973 Program) [2007CB714105]
- National Natural Science Foundation of China [50539060]
Bubble collecting, bubble holding and micro-bubble ejecting characteristics of pit structure and the influence of cavitation bubble on the development of erosion pit are investigated by means of high-speed photography experiments. Pits tend to collect and hold wandering cavitation bubbles. The air holding phenomenon of pits can be a destination of the incubation period in the process of cavitation erosion. The holding bubble tends to eject micro-bubbles from the top of holding cavitation bubble, making the pit a source of nuclei. With bubbles being held in pits, the diameters of pits increase rapidly. But in the given experiment condition, there is a specific stable value beyond which the diameter of pits will not increase. This characteristic will be helpful in understanding and predicting the cavitation erosion process.
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