Research On The Influence Of Muzzle Chamfer Angle On Muzzle Flow Field

In order to investigate the pattern of the asymmetric muzzle flow field,Simulation of asymmetric flow fields of muzzle devices with different chamfered angles.Investigate the effect of chamfered angle muzzle device on the flow field and hit point by performing the experiment with 03 rifle.The characteristics of the muzzle flow field was captured by the high-speed camera.The main research contents are as follows:(1)Muzzle flow field models with different chamfered angles were established,and turbulence models,governing equations and discrete methods suitable for the model were applied.(2)According to the internal ballistic calculation model,the variation law of the gas parameters in the bore during the internal ballistic period is obtained,and a calculation program was written for the initial conditions of the numerical calculation of the muzzle flow field.(3)The two-dimensional and three-dimensional about the process of projectiles ejecting from the muzzle device with different chamfering angles were simulated.Morphology of asymmetrical muzzle flow field with initial flow field was obtained.The pressure difference between the up and down sides of the bullet and the muzzle device were plotted.(4)The firing experiments were carried out by installing muzzle devices with different chamfered angles;and the relationship between the different chamfered angles and the impact point offset was obtained.The gas characteristics of the muzzle with a high-speed camera was photographed.The numerical results and experimental results are roughly similar.(5)The gas jet,bottle-shaped shock wave and shock wave in the asymmetric flow field are discussed and analyzed,and the influence of the asymmetric flow field on the average impact point is explored.