THE COUNTER-JET FORMATION IN AN AIR BUBBLE INDUCED BY THE IMPACT OF SHOCK WAVES  

作　　者：BAI Li-xin XU Wei-lin LI Chao GAO Yan-dong 

机构地区：[1]Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China [2]State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065,China [3]School of Electronic and Information Engineering, Liaoning Technical University, Huludao 125105, China

出　　处：《Journal of Hydrodynamics》2011年第5期562-569,共8页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Science and Technology Support Plan of China (Grant No.2008BAB29B04);the National Basic Research Program of China (973 Program,Grant No. 2007CB714105);the National Natural Science Foundation of China (Grant No. 11174315);the National Science and Technology Major Project ofChina (Grant No. 2011ZX05032-003)

摘　　要：The interaction of an air bubble （isolated in water or attached to a boundary） with shock waves induced by electric sparks is investigated by high-speed photography. The interaction is closely related to the counter-jet induced by the impact of shock waves. The formation of a counter-jet in an air bubble is related to the liquid jet formed in the same air bubble, but the mechanism is different with that of the counter-jet formation in a collapsing cavitation bubble. The formation of a counter-jet in an air bubble is related to discharge energy, air bubble size and radius of shock wave. With a given energy of the spark discharge, the formation of a counter-jet in an air bubble is related to δ / ε （the ratio of the dimensionless bubble-bubble distance to the dimensionless air bubble radius）. The counter-jet will only be produced when δ / ε is in the range of 1.2-2.2. The counter-jet in an air bubble is of an important nuclei-generating mechanism.The interaction of an air bubble （isolated in water or attached to a boundary） with shock waves induced by electric sparks is investigated by high-speed photography. The interaction is closely related to the counter-jet induced by the impact of shock waves. The formation of a counter-jet in an air bubble is related to the liquid jet formed in the same air bubble, but the mechanism is different with that of the counter-jet formation in a collapsing cavitation bubble. The formation of a counter-jet in an air bubble is related to discharge energy, air bubble size and radius of shock wave. With a given energy of the spark discharge, the formation of a counter-jet in an air bubble is related to δ / ε （the ratio of the dimensionless bubble-bubble distance to the dimensionless air bubble radius）. The counter-jet will only be produced when δ / ε is in the range of 1.2-2.2. The counter-jet in an air bubble is of an important nuclei-generating mechanism.

关 键 词：cavitation bubble shock wave counter-jet high-speed photography 

分 类 号：O347.5[理学—固体力学] TJ510.36[理学—力学]