The performance of the water-entry cavity on a high-pressure gas-driven projectile

9th International Symposium on Cavitation

Gong, Z.X.^1 ; Ma, L.^1 ; Fang, Y.L.^1 ; Liu, H.^1 ; Chen, Y.^1

Department of Mechanics, MOE Key Laboratory of Hydrodynamics, Shanghai Jiao Tong University, Shanghai, China^1

关键词: High pressure gas;    Pinchoff;    Supercavity;    Trailing cavity;    Water entry;    Weber numbers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012152/pdf
DOI  :  10.1088/1742-6596/656/1/012152

来源: IOP

【 摘 要 】

We present the experimental results of water-entry cavity on a slender projectile, which moves in the opposite direction of gravity. The regime of the cavity including sheet cavity, supercavity and trailing cavity is exhibited and its relevance to Euler and Weber numbers are illuminated. Meanwhile, various pinch-off performances of the supercavity are analysed and the resulting re-entrance jet or cavity ripples are presented.