摘要
为了研究超高射频武器高频连发时膛口流场形成机理和对弹丸飞行的影响,基于ALE方程和嵌入网格技术,结合动网格方法进行数值仿真分析。数值结果清晰地揭示了高频连发时火药气体相互叠加形成的复杂流场的结构。在相同装药量下,高频连发时后续弹丸膛内加速度远小于首发弹丸;后续弹丸出膛口后,弹前火药燃气膨胀形成低压区,而弹后压力高于首发弹丸弹后压力,使其加速度大于首发弹丸。仿真结果为研究超高射频武器高频连发时弹丸受力分析提供一些理论依据。
A study is made of the muzzle flow field and the influence on the projectile flying of the su-per-high firing-rate series launched weapon based on the ALE equation and chimera grids technology, in combination with dynamic grid method. The result clearly reveals that complex muzzle flow field structure of complicated gunpowder gas was formed in the process of the high firing-rate. In addition, under the same explosive charge,on the high firing-rate,the acceleration of the following projectile is far less than that of the first one. The following projectile outside the barrel,the gunpowder gas before the projectile expansion formed a low pressure area,while the pressure after the projectile is higher than the first,so that acceleration for the following projectile is greater than that for the first projectile. The simulation results provide some theoretical basis for the study of the rapid-fire strong coupling launch projectile force analysis.
出处
《火炮发射与控制学报》
北大核心
2016年第2期10-13,共4页
Journal of Gun Launch & Control
基金
基础科研(A0820132003)
关键词
膛口流场
动网格
强耦合
后随弹丸
muzzle flow field
dynamic grid
strong coupling
following projectile
