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

被引：0

作者：

Zhang J. ^{[1
]}

Yu Y. ^{[1
]}

机构：

[1] School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing

来源：

Baozha Yu Chongji/Explosion and Shock Waves | 2020年 / 40卷 / 10期

关键词：

Ballistic gun; Evolutionary characteristics; Mach disk; Muzzle flow field; Submerged launch; Underwater launching;

D O I：

10.11883/bzycj-2019-0478

中图分类号：

学科分类号：

摘要：

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. © 2020, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.

引用

共 12 条

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