Experimental Study on the Influence of Underwater Explosion Depth on the Disintegration of Thin Resin Plate Attached Microbubbles
This paper reports on the influence of underwater explosion depth on the disintegration of thin polystyrene plate attached microbubbles subjected to the underwater shock wave and the primary bubble induced by the explosion. The underwater explosion is created by the electrical discharge. The thin plate motion caused by the interaction of underwater shock wave and primary bubble with the plate is experimentally investigated and visualized by the shadowgraph method. The effect of explosion depth on the disintegration of plate is discussed by comparing visualized images. It was found that the disintegration of plate was depended on the explosion depth. It was also confirmed that the fragmentation of plate was caused not by the overpressure from microbubble collapse by the underwater shock wave loading but by the interaction of rebounding primary bubble with the plate in the experimental conditions of this study.
Part of the work was carried out under JSPS KAKENHI Grant Number 15 K18300 and 17 K18066 and the Collaborative Research Project of the Institute of Fluid Science, Tohoku University.
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