排气能量对底部排气弹气动特性影响的数值模拟

远程压制武器在现代战争中的作用越发凸显,各种增程技术成为现代火炮技术研究的重要方向,而底排减阻是重要的方法之一。底排药剂燃烧产生的气体含有相对较高的能量,重点研究底排气体能量对底部排气弹气动力特性的影响。建立底排能量边界条件,采用添加人工粘性项的MacCormack差分格式求解三维Euler方程组,数值求解绕底部排气弹弹丸流场,得到底部阻力等气动力系数。分析表明,能量是影响底部排气弹气动力特性进而影响减阻增程效果的重要因素之一,在一定条件下提高底排气体温度,有利于增大弹丸射程。研究结果可为进一步研究底部排气弹减阻增程提供参考。

Numerical Simulation of Base Bleed Energy Affecting Aerodynamic Performance of Base Bleed Projectiles

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.