Numerical Simulation of Muzzle Blast Flow and Performance of Muzzle Brake
The muzzle brake was selected as the subject of investigation.A finite volume method was employed to discretize the numerical values,utilizing a computational fluid dynamics approach.Mathe-matical and physical models of diverse muzzle fields were constructed for numerical simulation.The primary distinction between the two brake structures lies in the impact edge of the internal chamber.The simulation enabled an investigation of the distribution characteristics of parameters such as velocity and pressure within the muzzle field.It also facilitated an analysis of the principle of the muzzle brake and a study of the stress conditions associated with the different structures of the muzzle brake.Subse-quently,the resultant force of the muzzle brake in the aftereffect process was calculated,and the brake efficiency of each scheme was obtained.The following conclusions were reached upon comparing the calculation results of the various schemes.The impact edge effectively enhances the force by modifying the powder gas flow distribution and the underlying pressure,thereby improving the overall effect.The muzzle brake efficiency is increased from 35.18％to 53.35％.The research provides a theoretical foundation for the structural design of the muzzle brake.
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