高速旋转弹丸马格努斯效应数值研究
A Numerical Investigation of Magnus Effect for High-speed Spinning Projectile
查看参考文献17篇
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文摘
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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。 |
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其他语种文摘
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Based on the 3-dimensional N-S equations,simulation of flow field over a high-speed spinning projectile was carried out to investigate the generated mechanism of Magnus effect. Spinning was implemented through sliding mesh method. The Magnus force and moment coefficients variation with angle of attack were presented. The computation results have a good agreement with the experimental date. The generated mechanism of Magnus effect were analyzed by the flow field structure. The results show that asymmetric distortion of circumferential surface pressure and shear stress distribution,boundary layer distortion,distortional eddy generated at high angle of attack are the fundamental reasons for Magnus effect. Boat-tail has a great influence on the Magnus force and moment. |
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来源
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兵工学报
,2013,34(6):718-725 【核心库】
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DOI
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10.3969/j.issn.1000-1093.2013.06.010
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关键词
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流体力学
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滑移网格
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高速旋转弹丸
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马格努斯效应
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数值模拟
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地址
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北京理工大学宇航学院, 北京, 100081
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-1093 |
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学科
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航空 |
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文献收藏号
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CSCD:4886418
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