关键词: 流体力学, 底排弹, 数值模拟, 气动力, 能量

Abstract: The long range neutralization weapons play an important role in modern war. The extended range technology has become an important developmental direction of modern artillery technology. Base bleed technology is one of the important methods. The gas generated by grain burning contains high energy. This paper focuses on the effect of energy of base bleed gas on the aerodynamic properties. The base bleed boundary condition of energy was found. The three-dimensional Euler equations were solved with MacCormack scheme to obtain the flow field parameters and aerodynamic coefficients, such as the base drag coefficient. The results show that energy is one of the important factors, which has an effect on the aerodynamic properties of base bleed projectile, affecting the drag reduction and the extended range. Higher base bleed gas temperature leads to longer range under the certain conditions. The results can be used in the further improvement of the base bleed projectiles for reference.

Key words: fluid mechanics, base bleed projectile, numerical simulation, aerodynamics, energy