The simulation of the artillery interior and intermediate ballistics problem is performed to investigate the influence of a gas dynamics device, muzzle brake, on the muzzle hazard phenomena, such as flash and blast waves. The correlation of the chemical reactions with the characteristics of the muzzle flow field is analyzed by the simulation for a further understanding of the secondary combustion phenomenon of the muzzle flow. The novel structure of muzzle flow caused by the muzzle brake is presented by the simultaneous solution of the interior ballistics model and multi-species Navier-Stokes equations in order to analyze the influence of the muzzle brake structure on the chemical reactions. The secondary combustion of the muzzle flow due to the oxygen-supplement chemical reactions is obtained by the chemical reaction kinetic model. The interaction of the blast waves released from the muzzle brake is illustrated in detail and the mechanism of the formation of muzzle flash is analyzed. This research provides a reference for the studies on the suppression of the muzzle flash.

对火炮内部和中间弹道问题进行了模拟，以研究气体动力学装置、枪口制动器对枪口危险现象（如闪光和冲击波）的影响。通过仿真分析化学反应与枪口流场特性的相关性，以进一步了解枪口流的二次燃烧现象。通过内弹道模型和多物种Navier-Stokes方程的联立解法，提出了由枪口制动器引起的枪口流的新结构，以分析枪口制动器结构对化学反应的影响。由化学反应动力学模型得到了由于补氧化学反应引起的炮口流二次燃烧。详细说明了枪口制动器释放的冲击波的相互作用，分析了枪口闪光的形成机制。该研究为抑制枪口闪光的研究提供了参考。