Abstract:
The present work reviews the progress of single bubble and multipe bubbles acoustic cavitation.The mechanism of sonoluminescence is actually the high temperature and high pressure gas light. However, if calculated according to the present theory, the ionization degree of the gas inside the bubble is not enough to achieve the luminous intensity observed in the experiment, and there is a large difference between the calculated value and the experimental observation, and the ionization process needs further study. Secondly, the research progress of cavitation phenomenon with multiple bubbles is introduced, especially gives the simplified formula for calculating the interaction between bubbles when bubbles line up and bubbles group form small spherical structure, and introduces the method for calculating the acoustic field of acoustic cavitation by using the average field theory. In the end, the phenomenon of band gap in the acoustic spectrum in the acoustic cavitation cloud is introduced. This effect can be reproduced by using the theoretical calculation of the average field of acoustic cavitation, and the reason of this phenomenon can be revealed by using the linear analysis method.