Numerical Study on the Base Pressure Characteristics of Hybrid Projectile by Propulsion Conditions

There are two methods to increase the range of a projectile: a method of using an assisted rocket and a method of base bleeding. In this study, the characteristics of the base pressure of the hybrid projectile to which the assisted rocket and the base bleed were applied together were analyzed through CFD (Computational Fluid Dynamics) and a semi-empirical method. By this research, the base pressure characteristics depending on the conditions of rocket flame and base bleed through CFD result could be predicted, and the difference could be confirmed by comparing with the semi-empirical method result. This result can be used for performance prediction of similar weapon systems.