Experiment research of low-speed oblique water-entry of truncated cone-shaped projectile

LUO Yuchuan; HUANG Zhengui; GAO Jianguo; CHEN Zhihua; HOU Yu; GUO Zeqing

doi:10.11883/bzycj-2018-0498

Volume 39 Issue 11

Nov. 2019

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LUO Yuchuan, HUANG Zhengui, GAO Jianguo, CHEN Zhihua, HOU Yu, GUO Zeqing. Experiment research of low-speed oblique water-entry of truncated cone-shaped projectile[J]. Explosion And Shock Waves, 2019, 39(11): 113902. doi: 10.11883/bzycj-2018-0498

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LUO Yuchuan, HUANG Zhengui, GAO Jianguo, CHEN Zhihua, HOU Yu, GUO Zeqing. Experiment research of low-speed oblique water-entry of truncated cone-shaped projectile[J]. Explosion And Shock Waves, 2019, 39(11): 113902. doi: 10.11883/bzycj-2018-0498

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Experiment research of low-speed oblique water-entry of truncated cone-shaped projectile

doi: 10.11883/bzycj-2018-0498

National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2018-12-13
Rev Recd Date: 2019-03-19

Available Online: 2019-10-25

Publish Date: 2019-11-01

Abstract

Abstract

In this work we conducted comparative experiments of different truncated cone-nosed projectiles entering water at low-speed and oblique inclination to investigate the influence of the size of the head diameter on water-entry cavity and ballistic characteristics using high-speed photography. We observed and recorded the effects of the size of the head diameter on the cavitational evolution, velocity and pitch angle of the truncated cone-nosed projectiles. The following results were achieved: the larger the truncated cone head projectile diameter, the earlier the tail collides with the low surface cavity; the size of the head diameter has little effect on the cavity deep closure moment; the cavity of projectile increases with the increase of the head diameter; an excessively large or small head diameter is not conducive to the stability of water entry; when the water entry velocity of the projectile is below the critical velocity, the velocity shows an upward trend, while when it is above the critical velocity, it will show a downward trend.
- truncated cone,
- cavity,
- ballistic characteristics,
- water entry stability

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