Abstract
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.
基金项目
National Natural Science Foundation of China(52179092)
National Natural Science Foundation of China(52222904)
NETL
NSTL
万方数据