低速旋转弹丸偏流现象数值模拟  

Numerical Simulation of Deflective Flow for the Low-Speed Revolving Cannonball

作　　者：何颖[1] 胡金波[1] 邹亚[1] 孙凯[1] 

机构地区：[1]南京理工大学瞬态物理重点实验室,南京210094

出　　处：《兵器装备工程学报》2016年第1期18-22,30,共6页Journal of Ordnance Equipment Engineering

基　　金：总装基金(9140C3007081005)

摘　　要：以三维N-S方程为基础,运用滑移网格技术,采用标准k-ε湍流模型,对低速旋转弹丸在不同转速和攻角条件下的绕流流场进行了数值模拟,从流场结构和气动特性方面对低旋弹丸的偏流现象产生机理进行了分析,给出了弹丸侧向受力及周向压力分布规律,并对影响偏流现象的因素进行了验证。Based on the 3-dimension N-S equation, simulation of flow field over a low-speed spinning projectile at different rotate speed and angle of attack were carried out by using the standard k - ε turbulence model. Spinning was implemented through sliding mesh method, the generated mechanism of deflective flow for the low-speed revolving cannonball were analyzed by the flow field structure. Through numerical simulation, the lateral force and pressure coefficient along the cylinder＇ s surface were presented, and at last the influential factors of the deflective flow phenomenon were analyzed.

关 键 词：低速旋转炮弹 偏流 数值模拟 滑移网格 

分 类 号：TJ156[兵器科学与技术] TJ4