Characteristics of velocity attenuation and cavity expansion induced by horizontal water-entry of truncated-ogive nosed projectiles

Guo Zitao; Zhang Wei; Guo Zhao; Ren Peng

doi:10.11883/1001-1455(2017)04-0727-07

Volume 37 Issue 4

May 2017

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LI Xiao-jie, XIE Xing-hua, LI Rui-yong. Detonation synthesis for nano-metallic oxide powders[J]. Explosion And Shock Waves, 2005, 25(3): 271-275. doi: 10.11883/1001-1455(2005)03-0271-05

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Guo Zitao, Zhang Wei, Guo Zhao, Ren Peng. Characteristics of velocity attenuation and cavity expansion induced by horizontal water-entry of truncated-ogive nosed projectiles[J]. Explosion And Shock Waves, 2017, 37(4): 727-733. doi: 10.11883/1001-1455(2017)04-0727-07

LI Xiao-jie, XIE Xing-hua, LI Rui-yong. Detonation synthesis for nano-metallic oxide powders[J]. Explosion And Shock Waves, 2005, 25(3): 271-275. doi: 10.11883/1001-1455(2005)03-0271-05

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Characteristics of velocity attenuation and cavity expansion induced by horizontal water-entry of truncated-ogive nosed projectiles

doi: 10.11883/1001-1455(2017)04-0727-07

Guo Zitao¹,
Zhang Wei^{2
,
,},
Guo Zhao¹,
Ren Peng³

1.
School of Civil Engineering & Urban Construction, Jiujiang University, Jiujiang 332005, Jiangxi, China
2.
Hypervelocity Impact Research Center, Harbin Institute of Technology, Harbin 150080, Heilongjiang, China
3.
School of Naval Architecture & Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, Jiangsu, China

Received Date: 2015-06-29
Rev Recd Date: 2015-10-08
Publish Date: 2017-07-25

Abstract

Abstract

In this paper, the horizontal water-entry experiments of truncated-ogive projectiles at the velocity range of 100~150 m/s were conducted using a light-gas gun and a high-speed camera to record the whole water-entry process. The characteristics of the velocity attenuation and the drag coefficients of truncated-ogive projectiles were obtained, and the trajectory stability and the characteristics of velocity attenuation for the flat-nosed, the ogive-nosed and the truncated ogive-nosed projectiles were compared and analyzed. The cavity expanding behaviors induced by the truncated ogive-nosed projectile's water entry were studied and a theoretical model of the cavity expansion was established. The relationships between the radial cavity radius, cavity wall velocity and time, penetration distance at fixed locations and fixed times were obtained, and good agreements were found between the experimental observations and the theoretical analysis.
- truncated-ogive projectile,
- water-entry,
- drag coefficient,
- velocity attenuation,
- cavity expansion

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References(11)

References

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