Influence of Explosion Depth on Bubble Pulsation in Shallow Water Explosion

DONG Qi; WEI Zhuobin; TANG Ting; ZHANG Ning

doi:10.11858/gywlxb.20170580

Volume 32 Issue 2

Jan 2018

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Chinese Journal of High Pressure Physics > 2018 > 32(2): 024102.

DONG Qi, WEI Zhuobin, TANG Ting, ZHANG Ning. Influence of Explosion Depth on Bubble Pulsation in Shallow Water Explosion[J]. Chinese Journal of High Pressure Physics, 2018, 32(2): 024102. doi: 10.11858/gywlxb.20170580

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DONG Qi, WEI Zhuobin, TANG Ting, ZHANG Ning. Influence of Explosion Depth on Bubble Pulsation in Shallow Water Explosion[J]. Chinese Journal of High Pressure Physics, 2018, 32(2): 024102. doi: 10.11858/gywlxb.20170580

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Influence of Explosion Depth on Bubble Pulsation in Shallow Water Explosion

doi: 10.11858/gywlxb.20170580

DONG Qi^{1, 2
,},
WEI Zhuobin²,
TANG Ting^{2,*
,
,},
ZHANG Ning³

1.
Naval University of Engineering, Wuhan 430033, China
2.
Naval Logistics College of PLA, Tianjin 300450, China
3.
Naval Submarine Academy, Qingdao 266071, China

Received Date: 08 May 2017
Rev Recd Date: 22 May 2017

Abstract

Abstract

Based on the numerical model established using the ALE algorithm in consideration of the influencing factors of the water surface and the water bottom, the shallow water explosion in different explosion depths was simulated using LS-DYNA, and the credibility of the simulation results were verified by the comparison of numerical results and empirical formula.Then the bubble pulsation's form and loading characteristics in different explosion depths were explored, and the influence of the explosion depth on the bubble pulsation in shallow water explosion was analyzed.The results show that with the increase of the explosion depth, the influence of the free surface and gravity diminish, the influence of the hydrostatic pressure and the boundary surface rise up, the jet flow direction constantly changes from downward to upward during the bubble shrinkage process, and the times of the maximum bubble radius and pulsation period also gradually increase; that the specific impulse-water depth curve increases at first and then decreases, and the load distributions are basically consistent with each other when the explosion depth is close to the water bottom; the decline of the load slows down with the explosion's spreading distance; and that the growing trend of hazard explosion depth tends to slow down after rising steeply along with the increase of the depth measured, becoming stable towards the water bottom.
- shallow water explosion,
- numerical simulation,
- bubble pulsation,
- detonation depth

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References(22)

References

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Influence of Explosion Depth on Bubble Pulsation in Shallow Water Explosion

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