Abstract:
The phenomenon of cavitation damage to material surface widely exists in nuclear engineering, fluid machinery and other fields, which seriously affects the safe and stable operation of the system. The jet impact formed by the collapse of cavitation bubble near the boundary is one of the main mechanisms of cavitation damage. This paper reviews the existing study on the interaction between cavitation bubble and boundary from both theoretical and experimental aspects. Firstly, the theoretical system composed of the Kelvin impulse and image method is sorted out and optimized, and the general calculation process of Kelvin impulse of cavitation bubble near the boundary is sorted out. Taking four typical boundary conditions of the horizontal wall, free surface, angular wall and spherical particle as examples, the analysis process and calculation results of Kelvin impulse on cavitation bubble are introduced in detail. In addition, the study progress of high-speed photography experiment on the interaction between cavitation bubble and the above typical wall is shown. Finally, suggestions are given for the deeper combination of the Kelvin impulse theory and high-speed photography experiment, and the applicable conditions are given.