Numerical investigation on the muzzle flow field of an underwater submerged launched ballistic gun  at different water depths

ZHANG Jinghui; YU Yonggang

doi:10.11883/bzycj-2019-0478

Volume 40 Issue 10

Oct. 2020

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ZHANG Jinghui, YU Yonggang. Numerical investigation on the muzzle flow field of an underwater submerged launched ballistic gun at different water depths[J]. Explosion And Shock Waves, 2020, 40(10): 104201. doi: 10.11883/bzycj-2019-0478

Citation:

ZHANG Jinghui, YU Yonggang. Numerical investigation on the muzzle flow field of an underwater submerged launched ballistic gun at different water depths[J]. Explosion And Shock Waves, 2020, 40(10): 104201. doi: 10.11883/bzycj-2019-0478

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Numerical investigation on the muzzle flow field of an underwater submerged launched ballistic gun at different water depths

doi: 10.11883/bzycj-2019-0478

ZHANG Jinghui,
YU Yonggang^,

School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2019-12-25
Rev Recd Date: 2020-03-02
Publish Date: 2020-10-05

Abstract

Abstract

To investigate the influence of water depth on the evolution characteristics of the muzzle flow field of an underwater submerged launched ballistic gun, a two-dimensional axisymmetric transient muzzle flow field model was established. The fluid volume function multiphase flow model, standard k-ε turbulence model, Schnerr-Sauer cavitation model, combined with dynamic grid and user-defined function technology, are used to numerically simulate the evolution process of underwater muzzle flow field. An underwater visualized shooting experimental platform for a ballistic gun was built. The evolution process of the muzzle flow field when the 12.7 mm ballistic gun was fully submerged in water was observed, and the rationality of the numerical model was verified. Based on this, the evolution characteristics of the muzzle flow field at different water depths (h=1−100 m) are analyzed and compared. Through comparison, it is found that within the range of the muzzle flow field, the projectile displacement meets the exponential function with time under different water depths; the deeper the water, the longer it takes for the typical wave structure of the muzzle flow field to form, and the lower the peak temperature and pressure of the gas at the axial Mach disc, the smaller the pressure oscillation amplitude, the faster it stabilizes. but in the radial direction, the deeper the water depth, the longer the duration of pressure oscillations.
- ballistic gun,
- submerged launch,
- underwater launching,
- muzzle flow field,
- Mach disk,
- evolutionary characteristics

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References(12)

References

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