Experimental investigation on vertical water-entry cavity of sphere

Ma Qing-peng; He Chun-tao; Wang Cong; Wei Ying-jie; Lu Zhong-lei; Sun Jian

doi:10.11883/1001-1455(2014)02-0174-07

Volume 34 Issue 2

May 2014

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Ma Qing-peng, He Chun-tao, Wang Cong, Wei Ying-jie, Lu Zhong-lei, Sun Jian. Experimental investigation on vertical water-entry cavity of sphere[J]. Explosion And Shock Waves, 2014, 34(2): 174-180. doi: 10.11883/1001-1455(2014)02-0174-07

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Experimental investigation on vertical water-entry cavity of sphere

doi: 10.11883/1001-1455(2014)02-0174-07

1.
School of Astronautics, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
2.
Beijing Mechanical Equipment Institute, Beijing 100854, China

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Corresponding author: Ma Qing-peng, qingpengma@gmail.com
Received Date: 2012-09-12
Rev Recd Date: 2012-12-24
Publish Date: 2014-03-25

Abstract

Abstract

Experimental investigations and analysis were carried out on the vertical water-entry of the spheres.The development process of the cavities induced by the vertical water-entry of the spheres was discussed including the formation, open, closure and collapse of the cavities.The influences of the water-entry velocities and surface conditions of the spheres on the cavities were experimentally obtained.And the displacements, velocities, accelerations and drag coefficients of the spheres during the water entry were analyzed.The investigated results show that the motion parameters of the spheres present highly nonlinear characteristics.And there are obvious fluctuations of the motion parameters and the drag coefficients during the closed-cavity phase if the water-entry velocities are high.
- fluid mechanics,
- water-entry cavity,
- vertical water-entry,
- sphere,
- motion parameter

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References(18)

References

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