Cavitation bubbles collapse characteristics behind a convex body

Cavitation bubbles behind a convex body were experimentally studied by a high speed camera and a hydrophone synchronously. The experiments were conducted in a circulating water tunnel with five various contraction ratios: β = 0.497, β = 0.6, β = 0.697, β = 0.751, and β = 0.799. The distributions of...

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Bibliographic Details
Published in	Journal of hydrodynamics. Series B Vol. 25; no. 6; pp. 886 - 894
Main Author	李瑶许唯临张亚磊张敬威）陈春祺阿蓉
Format	Journal Article
Language	English
Published	Singapore Elsevier Ltd 01.12.2013 Springer Singapore
Subjects	Bubbles Cavitation cavitation bubble cavitation noise Circulating Collapse convex body energy conversion Engineering Engineering Fluid Dynamics high speed camera High speed cameras hydrodynamics Hydrology/Water Resources Hydrophones Numerical and Computational Physics photography Simulation Tunnels (transportation) Walls 凸体孔板消能崩塌气泡水头损失特性空化泡高速摄像机 high speed camera cavitation bubble convex body cavitation noise collapse
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ISSN	1001-6058 1878-0342
DOI	10.1016/S1001-6058(13)60437-0

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Summary:	Cavitation bubbles behind a convex body were experimentally studied by a high speed camera and a hydrophone synchronously. The experiments were conducted in a circulating water tunnel with five various contraction ratios: β = 0.497, β = 0.6, β = 0.697, β = 0.751, and β = 0.799. The distributions of the cavitation bubble collapse positions behind the five different convex bodies were obtained by combining the images taken by the high speed camera. According to the collapse positions, it was found that no cavitation bubble was collapsed in the region near the wall until the ratio of the water head loss over the convex body height was larger than 20, which can be used to predict if the cavitation damage would occur in the tunnel with orifice energy dissipaters.
Bibliography:	31-1563/T convex body, cavitation bubble, collapse, high speed camera, cavitation noise Cavitation bubbles behind a convex body were experimentally studied by a high speed camera and a hydrophone synchronously. The experiments were conducted in a circulating water tunnel with five various contraction ratios： β = 0.497, β= 0.6, β= 0.697, β= 0.751, and β= 0.799. The distributions of the cavitation bubble collapse positions behind the five different convex bodies were obtained by combining the images taken by the high speed camera. According to the collapse positions, it was found that no cavitation bubble was collapsed in the region near the wall until the ratio of the water head loss over the convex body height was larger than 20, which can be used to predict if the cavitation damage would occur in the tunnel with orifice energy dissipaters. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1001-6058 1878-0342
DOI:	10.1016/S1001-6058(13)60437-0