鸭式布局低旋制导迫弹气动特性数值研究  

Research on Aerodynamic Characteristics of Guided Mortar Projectile with Canards Under Low-Speed Rotation

作　　者：周强 姚文进 贾方秀 ZHOU Qiang;YAO Wenjing;JIA Fangxiu(Minsterial Key Laboratory of Intelligent Ammunition,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学智能弹药国防重点学科实验室,南京210094

出　　处：《兵器装备工程学报》2019年第5期66-69,共4页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金项目(61201391)

摘　　要：基于3D N-S方程和k-ω湍流模型,并结合overset重叠动网格技术,在亚、跨声速范围内,对不同攻角和不同转速下的制导迫弹的流场进行了数值模拟,以美国空军改进的计算标模验证该文算法的有效性。计算结果发现:制导迫弹的阻力、升力和俯仰力矩与转速无关,滚转力矩随转速的增大而增大,俯仰力矩和滚转力矩随马赫数先增大后减小且均在0. 7Ma处达到最大值。In order to research the effect of canards on the aerodynamic characteristics of low-spin guided mortar projectile,the flow field around the projectile under different attack angles and rotating speeds was simulated at subsonic and transonic by applying 3D N-S equations,k-ωturbulence model and overset dynamic mesh technology.The validity of the numerical method was verified by the Modified Basic Finner model.According to the calculation results under different Mach number,angle of attack and speed,it is found that:the drag,lift and pitch moment are independent of the rotation speed.The rolling moment increases with the increasing of the rotation speed.The pitch moment and rolling moment first increase and then decrease with the Mach number and both reach the maximum value at 0.7 Ma.

关 键 词：迫弹 气动特性 重叠网格 流场 

分 类 号：TJ410[兵器科学与技术—火炮、自动武器与弹药工程]