A Numerical Simulation of Gas Gun Performance

Résumé du livre

A quasi one-dimensional Lagrangian compressible flow solver was used to simulate the gas dynamics of the DSTO transonic gas gun at Port Wakefield. The practice of initially locating the projectile partway down the barrel, in a bid to reduce muzzle velocity, was also investigated. We find excellent agreement between simulated and measured muzzle velocity, for both the case of full barrel-length projectile travel and reduced projectile travel. While the reduction in projectile travel is shown to be a valid means to significantly reduce muzzle velocity, we also show that this configuration results in shock loading to the projectile and increased barrel pressure.