Interaction Study Of Interior Ballistics Flow Of Gun's Chamber And Muzzle Flowfield

In recent years, the modem war requires continuous improvement of the firing precision. Among a great deal of effects that affect the firing precision of gun, the muzzle blast wave is an important factor. So it is important to make research on muzzle flowfield, and analyze the effects of muzzle blast wave on the firing precision of gun. It has vital significance to instruct experiment and improve the firing precision of gun. This paper main include four points:(1) The model of interior ballistics is established, and it is numerically simulated by Runge-Kutta scheme while the pressure ahead the projectile is taken into consideration. Computational results are consistent with experimental ones. It is shown that the simulation of the interior ballistic process is successful.(2) The model of two-dimensional muzzle flow of 7.62mm rifle is established. The FLUENT which uses the Finite volume method is used to solve the muzzle flow model on the 2d unstructured grids, and satisfactory result is obtained, which proves that the method is successful.(3) The model of two-dimensional muzzle flow of single-barrel is established while interior ballistics process and muzzle flow process are coupled, and the curves of p-t,v-t are obtained. The effects of different loading conditions on the shape of muzzle flowfield and on the force of the load on the projectile are analyzed.(4) The model of two-dimensional muzzle flow of double-barrel is established while interior ballistics process and muzzle flow process are coupled, and the curves of p-t,v-t are obtained. The effects of different distance of barrel and launch time on the shape of muzzle flowfield and on the force of the load on the projectile are analyzed.