Numerical Investigations on Acceleration of Projectile in Post-Effect Period

After exiting the muzzle, the projectile continues being accelerated to maximum velocity by the propellant flow. The increasing of velocity in post-effect period has a great influence in the design of weapons and weapon firing precision. The process of firing under different conditions was numerically studied using finite volume method based on moving grids. Force on the projectile and the movement of the projectile were discussed. When and where the projectile reach its maximum velocity as well as the velocity increasing rate and the factors influences it was analyzed in detail. The result shows that the rate of increasing velocity may be over 3%, and is hardly affected by bullet mass and explosive charge.