Numerical simulation of peak pressure in near-field underwater explosion

GONG Xiangfei; LIU Wentao; ZHANG Shudao; YANG Jiming

doi:10.11883/bzycj-2017-0262

Volume 39 Issue 4

Mar. 2019

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Article Navigation > Explosion And Shock Waves > 2019 > 39(4): 041409

GONG Xiangfei, LIU Wentao, ZHANG Shudao, YANG Jiming. Numerical simulation of peak pressure in near-field underwater explosion[J]. Explosion And Shock Waves, 2019, 39(4): 041409. doi: 10.11883/bzycj-2017-0262

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GONG Xiangfei, LIU Wentao, ZHANG Shudao, YANG Jiming. Numerical simulation of peak pressure in near-field underwater explosion[J]. Explosion And Shock Waves, 2019, 39(4): 041409. doi: 10.11883/bzycj-2017-0262

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Numerical simulation of peak pressure in near-field underwater explosion

doi: 10.11883/bzycj-2017-0262

1.
Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui China
2.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

Received Date: 2017-07-13
Rev Recd Date: 2018-10-10

Available Online: 2019-03-25

Publish Date: 2019-04-01

Abstract

Abstract

In this work, to obtain the pressure state of underwater explosion in near-field, we numerically simulated the whole process of underwater explosion using the smoothed particle hydrodynamics and adopting the C-J detonation model, and following the empirical formulas, confirmed the laws of the peak pressure, thereby verifying the effectiveness of the numerical program. We also analyzed the waves' propagation in underwater explosion and compared it with the numerical results of underwater explosion in various dimensions. The results show that the distance ratio R/a=6 is a demarcation point in the waves structure, and in the R/a＜6 near-field range the fitted peak pressure curve should be divided into two sections. Further, we performed segmented fitting of the numerical results with power function, and found the fitted curve in good agreement with the numerical results.
- underwater explosion,
- peak pressure,
- near-field,
- smoothed particle hydrodynamics,
- dimension effect,
- power fitting

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References(14)

References

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