Numerical analysis of projectile-based low overload launch model

Abstract

In modern war, the special ammunition launched by mortars contains photoelectric components, which can’t bear high overload, so low overload launching is required. This paper creatively conceives the integrated structure of projectile and inverted high-pressure chamber without changing the mortar tube’s original structure design. The flow field in the bore is modeled and simulated by using classical interior ballistics and FLUENT, and the difference between the chamber pressure of the inverted high-pressure chamber structure and the traditional structure are analyzed. The simulation results show that the initial motion law of the projectile launched by the inverted high-pressure chamber structure is different from that launched by the original structure. Chamber pressure has two peaks, the peak value decreases by 25 %, the velocity increases by 5 %, and the displacement increases by 60 %.