Effect of Base Cavity to Projectile Drag Coefficient
For putting up the range of fire, improving the firing accuracy and enlarging the breaking brisance of the projectile, use Fluent software to research the effect of the base cavity to drag coefficient of the projectile. Based on 122 mm base cavity projectile, use UG to establish 3D model of 122 mm common projectile and 122 mm projectile with base cavity, carry out simulation comparison analysis under different Mach number and different base cavity depth conditions. The result showed that the reducing percentage of the drag coefficient was the largest when the Mach number less than 1; at the same time, when the base cavity depth was 100 mm, the projectile had the best effect of reducing the drag coefficient. The simulation result unfolded that the base cavity had the effect of reducing the drag coefficient and putting up the range of fire to a certain degree, especially, on condition of the subsonic speed; at the same time, putting up the base cavity depth could raised the effect of reducing the drag coefficient, while, the base cavity depth had a best value.
国家科技期刊平台
NSTL
万方数据
维普
