| In this paper, the muzzle flow field has been numerically simulated by using the computational fluid dynamics simulation software. The main researches include:the 2D muzzle flow field numerical simulation without the muzzle brake, which takes both projectile and ignoring the projectile in account; the 3D muzzle flow field numerical simulation with a muzzle brake, which takes both projectile and ignoring the projectile in account; the 3D numerical simulation of the stabilizing device in the muzzle flow field with a muzzle brake.The muzzle flow field study is in the first place, in which the factor of considering and ignoring the projectile has been included. In order to simulate the projectile movement in the muzzle flow field, the structured dynamic grid based on local layering method is used in this paper. The simulation results clearly show the formation and development process of muzzle blast wave, and the influences to muzzle flow field caused by muzzle brake. The result has guiding significance to the research of muzzle flow field, and provides the foundation to the stabilizer research below.Then the stabilizing device has been analyzed in the flow field with muzzle brake. It has described that the mutual effect between empennage and flow field, the flow field formation and developing process of moderately under-expanded supersonic impinging jet, and the structure and properties of flow field with complex blast wave. It has also analyzed the distribution characteristics and size of aerodynamics load that empennage device encountered in the muzzle flow field. |
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