Numerical Simulation and Experimental Test on Muzzle Brake Efficiency

Numerical simulation and firing test of a gun was performed to give the muzzle brake efficiency and pressure of muzzle blast wave for evaluating the muzzle brake performance. Two models of muzzle flow were given respectively with Euler equations ignore initial flow field and Navier-Stokes equations with turbulence model consider initial flow field. Numerical simulation was carried out and simulation results were contrasted with experimental ones. The property of the two models, differences between the results and the causation were discussed. Experimental data such as pressure-time curves of P1 chamber and P3 chamber, recoil displacement-time curve and pressure-time curve near the muzzle were collected to calculate the muzzle brake efficiency with recoil resistance work method. The theoretic muzzle brake efficiency was also calculated to be compared which makes good consistency.