Cavitation characteristics of pit structure in ultrasonic field

被引：27

作者：

Bai LiXin ^{[1
]}

Xu WeiLin ^{[1
]}

Zhang FaXing ^{[1
]}

Li NaiWen ^{[1
]}

Zhang YiChi ^{[1
]}

Huang DeFa ^{[1
]}

机构：

[1] Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China

来源：

SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES | 2009年 / 52卷 / 07期

基金：

中国国家自然科学基金;

关键词：

cavitation bubble; ultrasonic cavitation; erosion pit; high-speed photography; SURFACE-ROUGHNESS; RIGID BOUNDARY; EROSION; COLLAPSE; BUBBLES;

D O I：

10.1007/s11431-009-0132-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

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 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.

引用

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