Analysis of Muzzle Flow Field Characteristic of Machine Gun in Different Environments

Abstract To study the distribution characteristics of muzzle flow field underwater sealed launch in different environments, a two-dimensional axisymmetric multiphase numerical model was established. The VOF model, Standard k-ε turbulence user-defined function (UDF), and dynamic mesh technology are used to simulate evolution process air launch. calculation results show that is significantly from air. initial velocity projectile for 64 m/s, lower than air, while pressure temperature increased. Mach disk initially formed at about 145μs launched underwater, it 240μs When launching linear attenuation after leaves muzzle, first accelerates then slowly decays Compared with core area shock wave smaller, warhead relatively higher, there no crown front head.