Effect of Flame Inhibitor of the Muzzle Flame of Large Caliber Gun

doi:10.3969/j.issn.1000-1093.2022.02.004

Abstract

Abstract: Because of the complexity of charge components and large charge weight of the large caliber gun, the muzzle flame is more serious during firing, which is easy to bring threat to personnel or battlefield camouflage. A chemical reaction model considering flame inhibitor for a 155 mm gun is established to study the generation and evolution of muzzle flame. PISO algorithm is used to simulate the muzzle flow field of gun with or without adding flame inhibitor. The simulated results show that the mass fractions of combustible components ( C and CO) in the gun muzzle decrease obviously and the maximum temperature outside the muzzle decreases from 3 000 K to 2 200 K after 1.5% K₂SO₄ is added into the propellant. This explains that the flame inhibitor can effectively inhibit the generation and evolution of muzzle flame. By comparing the simulated results with the experimental images, it can be seen that the shapes and sizes of simulated and experimental muzzle flame profiles are consistent. Also, it is found that the error is less than 5% after using the element grid to estimate the fireball area outside the muzzle.

Key words: largecalibergun, flameinhibitor, muzzleflame, PISOalgorithm, numericalsimulation

CLC Number:

TJ012.1⁺3

WANG Danyu, NAN Fengqiang, LIAO Xin, XIAO Zhongliang, DU Ping, WANG Binbin. Effect of Flame Inhibitor of the Muzzle Flame of Large Caliber Gun[J]. Acta Armamentarii, 2022, 43(2): 273-278.

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