Abstract
The development of advanced artillery needs to be combined with simulation means, so, traditional calculation method and the flow field simulation method was employed to calculate the efficiency of a largecaliber muzzle brake we designed, and the results achieved by these two methods were 47.8% and 49.3%, respectively. Further, the overpressure value 1 m away from the muzzle was obtained through flow field simulation, and the far-field overpressure value was calculated using blast wave attenuation equations. The result suggests that the blast wave from the designed muzzle brake has little harmful impact. This paper provides an intuitive calculation method of muzzle brake efficiency, also, it provides theoretical support for research of high efficiency muzzle brake and personnel protection onboard.
Highlights
The artillery, as major arms engaged in firepower coverage and firepower suppression, is hailed as “the god of war”
Muzzle brakes can be divided into three types by structure — impact muzzle brakes, reaction muzzle brakes, and impact-reaction muzzle brakes
Most of the active artillery is equipped with impactreaction muzzle brakes, which possess characteristics of both impact muzzle brakes and reaction muzzle brakes
Summary
The artillery, as major arms engaged in firepower coverage and firepower suppression, is hailed as “the god of war”. Impact-reaction muzzle brakes have chambers that expand with a certain angle and retroverted side holes. Once the explosive gas enters the chamber, it expands and flows fast, and holes on both sides of the chambers play a role in flow distribution and gas expansion for the second time, so as to significantly reduce the recoil. The more efficient the muzzle brake is, the more recoil of the artillery will be reduced. There is conflicts between the muzzle brake’s efficiency and the intensity of the muzzle blast wave. Simulation of the flow field of muzzle brakes by ANSYS Fluent cannot only present the intensity of blast waves near the muzzle, but obtain the extent of force of the artillery barrel and the muzzle brake to calculate the efficiency of the muzzle brake
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