弹壁开孔对迫弹飞行稳定性的影响  

Effects of Wall Openings on Mortar Flight Stability

作　　者：杨光晖[1] 曹红松[1] 张晓艳 李仁禧 刘务平 

机构地区：[1]中北大学机电工程学院,太原030051 [2]淮海工业集团,山西长治046012 [3]国营791厂,重庆400069

出　　处：《弹箭与制导学报》2014年第1期98-100,157,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：为了分析某迫弹圆柱部开孔后,对其气动特性和飞行稳定性的影响。文中根据实际情况建立了正常迫弹和开孔迫弹的模型,利用CFD软件对这两种外形迫弹的三维绕流流场进行了数值模拟计算,得到了这两种迫弹的气动参数,并进行了外弹道飞行试验。结果表明,在迫弹圆柱部开孔后,会使弹丸阻力系数增大,升力系数减小,稳定储备量降低,特别是在低马赫数情况下,可能使弹丸出现飞行不稳定。In order to analyze the effect of the holes in a mortar shell＇ s cylinder part on aerodynamic characteristics and flight stability, in this paper, the normal mortar model and the model with holes were built according to actual situation. The three-dimensional flow field was simulated around the two mortars using CFD software, the aerodynamic parameters of these two mortars were obtained, and the exterior bal- listics flight test was carried out. The result indicates that the model with holes in the cylinder part will increase the drag coefficient, de- crease the lift coefficient and lower the stability reserve. Flight instability will occur, especially at low Maeh number.

关 键 词：飞行稳定性 数值模拟 气动外形 稳定储备量 

分 类 号：TJ012.3[兵器科学与技术—兵器发射理论与技术]