Numerical Research on Secondary Muzzle Flash Using Gridless Method

doi:10.3969/j.issn.1000-1093.2014.12.009

Abstract

Abstract: The secondary muzzle flash, involving high-speed projectile, is numerically studied using a least-square gridless method. The fluid dynamics is modeled by arbitrary Lagrangian-Eulerian equations with chemical source term. The numerical flux and chemical kinetics are dealt with by multi-component HLLC scheme and the finite rate chemical model. A restructuring technique is adopted to dispose the freaky clouds due to the moving boundaries. The full flow fields are simulated to examine the effects of potassium salt flame suppressors and muzzle pressure on the muzzle flash. The computational shadowgraph is in good agreement with experimental shadowgraph. The results show that 2% addition in potassium salt or 30% reduction in muzzle pressure may inhibit the secondary muzzle flash effectively.

Key words: ordnance science and technology, gridless method, chemical non-equilibrium flow, dynamic cloud, muzzle flow field

CLC Number:

TJ25

WU Wei, XU Hou-qian, WANG Liang, XUE Rui. Numerical Research on Secondary Muzzle Flash Using Gridless Method[J]. Acta Armamentarii, 2014, 35(12): 1991-1997.

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