Analysis of the bubble-pulsation process of underwater high current pulsed discharge

The bubble of underwater high current pulsed discharge forms after the pre-breakdown process, and the change in electrical loop parameters will affect its pulsation characteristics. The relationship between loop electrical parameters and the bubble-pulsation process is unclear, and its influence on the acoustic characteristics of the bubble-pulsation is not apparent. In order to quantitatively analyze the bubble-pulsation characteristics, a comprehensive experimental platform of underwater high current pulsed discharge is built. Under different loop electrical parameters, with the help of experimental data of electrical signals and optical images, the variation characteristics of the bubble-pulsation period and energy are analyzed. The acoustic characteristics of the bubble-pulsation process are analyzed, and the correctness of acoustic characteristic analysis is verified by experimental results. The comparison between experimental and theoretical data shows that the analysis of bubble-pulsation period and energy is correct. The bubble-pulsation characteristics can be predicted utilizing the deposition energy of the plasma channel. The results provide a basis for the quantitative analysis of the bubble-pulsation characteristics and strengthen the connection between the three underwater high current pulsed discharge processes.