首页|Energy partition in laser-induced cavitation bubbles near the rigid wall with a gas-containing hole
Energy partition in laser-induced cavitation bubbles near the rigid wall with a gas-containing hole
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To investigate the energy partition in laser-induced cavitation bubbles near the rigid wall with a gas-containing hole,we utilized a nanosecond resolution photography system based on a Q-switched Nd∶YAG laser and conventional industrial camera to carefully observe the transient process of bubble collapse near the rigid wall with a gas-containing hole.We analyzed the generation of collapse microjets and the emission of collapse shock waves.We found that the cavitation bubble near the rigid wall with a gas-containing hole collapsed at different times and space,and produced various types of shock waves.Based on the far field pressure information of the shock waves measured by hydrophone,the energy of the shock waves generated by the bubble collapse near the rigid wall with a gas-containing hole is calculated for the first time.The results show that the ratio of collapse shock wave energy to bubble energy is approximately between 0.7 and 0.8.
Energy partitionbubble collapselaser-inducedshock wavegas-containing hole
Dong-qiao He、Hai-gang Wen、Si-yuan Geng、Chen-xi Yang、Qiang Zhong、Zhi-feng Yao
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College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China
State Key Laboratory of Efficient Utilization of Agricultural Water Resources,Beijing 100083,China
Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System,China Agricultural University,Beijing 100083,China
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National Natural Science Foundation of ChinaNational Natural Science Foundation of China
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NSTL
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