侧倾底凹结构对火炮弹丸阻力的影响  

Research on Shrinkage Shape of Base Cavity Upon Aerodynamic Drag of Projectile

作　　者：陆海波[1] 高洁[2] LU Haibo;GAO Jie(Artillery Military Theory Innovation and Operation Experiment Center,Army Academy of Artillery and Air Defense, Nanjing 211132, China;Foreign Language Department, Jiangyin Polytechnic College, Jiangyin 214433, China)

机构地区：[1]南京炮兵学院炮兵军事理论创新与作战实验中心,南京211132 [2]江阴职业技术学院外语系,江苏江阴214433

出　　处：《兵器装备工程学报》2019年第6期5-9,共5页Journal of Ordnance Equipment Engineering

摘　　要：建立了火炮底凹弹丸的数值计算模型,基于Navier-Stokes方程对底凹弹的超声速绕流流场进行了求解,得到了弹丸的流场参数与阻力系数,探讨了不同底凹侧壁倾斜角度对底凹结构减阻性能的影响。研究发现:就提高弹丸底压以减小其气动阻力而言,带有“收缩角”的底凹结构优于传统的圆柱状底凹结构;底凹结构的“收缩角”存在最优值。Focuses on the drag reducing efficiency of the base cavity,the projectile with the base cavity was investigated numerically.The supersonic flow field of the projectile with base cavity was simulated with the Navier-Stokes(N-S)equations,the flow field parameters and the aerodynamic drag were obtained.The influence of the slope angle upon the base cavity upper wall on the drag reducing efficiency of the base cavity was discussed.The numerical results show that,compared with the traditional cylinder base cavity shape,the projectile with a base cavity which is shrinkage shape has better drag reducing efficiency.There is optimal slope angle upon upper wall of the base cavity.

关 键 词：弹药增程 火炮 底凹结构 气动阻力 数值优化 

分 类 号：TJ410[兵器科学与技术—火炮、自动武器与弹药工程]