Abstract
The knowledge of the behavior of a cavitation bubble in a narrow space, such as a cylinder liner, is still very scanty. In this study, the behavior of a spark-induced bubble between parallel walls is photographed by a high-speed camera, and the generated impulsive pressure waves are detected by piezo-type transducers. The experiment is carried out by changing the distance between the walls and the location of the bubble formation, and it is made clear that when the non-dimensional wall distance is small, the collapsing bubble becomes gourd shaped and at the final stage of the collapse, the bubble is broken down into two small bubbles, and their sizes depend on the initial bubble location. Moreover, such behavior of the bubble is simulated by the numerical method of Plesset-Chapman.
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