摘要
为了研究高速旋转弹丸在飞行过程中产生马格努斯效应的气动机理,本文以三维N-S方程为基本方程,采用滑移网格技术,对弹丸在高速旋转状态下的绕流场进行了数值模拟。给出了马格努斯力和力矩系数随攻角的变化规律,所得结果与实验数据符合很好,并从流场结构对马格努斯效应产生的机理进行了分析。结果表明,弹体周向压力和切应力分布的畸变、边界层畸变、大攻角下涡的非对称畸变是马格努斯效应产生的主要原因,且船尾对弹体马格努斯力和力矩的影响很大。
Based on projectile was carrie implemented through angle of attack were date. The generated presented. mechanism The computation results have a good agreement of Magnus effect were analyzed by the flow field show that asymmetric distortion of circumferential layer distortion, distortional eddy generated Magnus effect. Boat-tail has a great influence surface pres high angle Magnus with the structure. experimental The results sure and shear stress distribution, boundary of attack are the fundamental reasons for force and moment.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2013年第6期718-725,共8页
Acta Armamentarii
关键词
流体力学
滑移网格
高速旋转弹丸
马格努斯效应
数值模拟
fluid mechanics
sliding mesh
high-speed spinning projectile
Magnus effect
numericalsimulation
