Numerical simulation analysis of the flow field in the bore of a two-stage light gas gun

Abstract In order to study the effect of different launch tube diameters gas-driven two-stage light gas guns on flow field during process, a model piston movement in pump projectile was established using Fluent. Using dynamic mesh technology and 6DOF model, numerical simulation process gun carried out, effects tubes velocity bore were obtained. The results show that when mass difference between is large, appropriately increasing diameter conducive high-pressure cone increases launching speed. analysis provides basis for design optimization gun.