Cavitation characteristics of pit structure in ultrasonic field

查看全文 作　　者：BAI [1]LiXin;XU [1]WeiLin;ZHANG [1]FaXing;LI [1]NaiWen;ZHANG [1]YiChi;HUANG [1]DeFa

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

出　　处：《Science China(Technological Sciences)》索引2009年第52卷第7期,共7页

基　　金：Supported by the National Basic Research Program of China('973'Program)(Grant No.2007CB714105);the National Natural Science Foundation of China(Grant No.50539060) 摘　　要：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 highspeed 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. 关键词：CAVITATION BUBBLE ultrasonic CAVITATION EROSION PIT HIGH-SPEED PHOTOGRAPHY

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Cavitation characteristics of pit structure in ultrasonic field

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