A study on the cavitation expansion related characteristics induced by horizontal water entry of projectiles
GUO Zitao1，CHEN Tuo2，GUO Zhao1，ZHANG Wei2
1.School of Civil Engineering & Urban Construction,Jiujiang University,Jiujiang 332005,China;
2.School of Astronautics,Harbin Institute of Technology,Harbin 150001,China
Abstract：In this paper,the horizontal water-entry experiments of flat,hemispherical,truncated-ogival and spherical projectiles at the velocity range of 100—300 m/s have been conducted with a light-gas gun.The whole water entry and cavitation expansion processes were recorded by a high-speed camera.Variation laws of the pressure difference Δp along the penetration distance were indirectly investigated by the principle of energy conservation.Moreover,the average cavity wall velocity at different cavity sections which are along the penetration distance was also studied.Two variation laws were found for the pressure difference Δp,and results show that the average cavity wall velocity remains consistent basically for different cavity sections along the ballistic trajectory which is in the same water-entry condition.Good agreements were observed between experimental and analytical results.
郭子涛1，陈拓2，郭钊1，张伟 . 弹体水平入水的空泡扩展相关特性研究[J]. 振动与冲击, 2019, 38(4): 90-94.
GUO Zitao1，CHEN Tuo2，GUO Zhao1，ZHANG Wei2. A study on the cavitation expansion related characteristics induced by horizontal water entry of projectiles. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(4): 90-94.
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