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兵工学报 ›› 2017, Vol. 38 ›› Issue (9): 1705-1715.doi: 10.3969/j.issn.1000-1093.2017.09.006

• 论文 • 上一篇    下一篇

小攻角下船尾外形对旋转弹丸马格努斯效应影响的数值研究

雷娟棉1, 张嘉炜1, 谭朝明2   

  1. (1.北京理工大学 宇航学院, 北京 100081; 2.中国船舶工业系统工程研究院, 北京 100036)
  • 收稿日期:2016-11-14 修回日期:2016-11-14 上线日期:2017-11-03
  • 作者简介:雷娟棉(1968—),女,教授,博士生导师。E-mail:leijm@bit.edu.cn
  • 基金资助:
    国家自然科学基金项目(11372040)

Influence of Boattail on the Magnus Effect of Spinning Non-finned Projectile at Small Angles of Attack

LEI Juan-mian1, ZHANG Jia-wei1, TAN Zhao-ming2   

  1. (1.School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China; 2.Systems Engineering Research Institute, China State Shipbuilding Corporation, Beijing 100036, China)
  • Received:2016-11-14 Revised:2016-11-14 Online:2017-11-03

摘要: 为了研究小攻角下船尾外形对旋转弹丸马格努斯效应的影响,对不同船尾外形的旋转弹丸进行了数值模拟,得到了气动力及力矩随马赫数Ma、船尾角θt和船尾长度Lt与弹径D的比值Lt/D的变化。根据气动特性及流场结构,分析了船尾及马赫数对旋转弹丸马格努斯效应的影响,并研究了旋转弹丸马格努斯效应的产生机理。结果表明:在船尾段,由边界层位移厚度的非对称畸变所产生的沿z轴负方向的力随θt和Lt /D的增大而逐渐增大;由周向切应力非对称畸变所产生的沿z轴正方向的力沿x轴逐渐增大,随Ma的增大而逐渐增大,随θt和Lt/D的增大而逐渐减小;由沿弹体轴向和周向压力分布的非对称性所产生的沿z轴负方向的力随θt和Lt/D的增大而逐渐增大,并且在超声速时随Ma的增大而逐渐减小,在亚跨声速时随Ma的增大而逐渐增大。

关键词: 兵器科学与技术, 马格努斯效应, 船尾角, 船尾长度

Abstract: In order to study the influence of boattail on the Magnus effect of spinning projectile at small angles of attack, the configurations with various boattail angles (θt ) and lengths (Lt/D) are numerically simulated. The variations of the aerodynamic force and moment with Ma, θt and Lt/D are obtained. According to the aerodynamic characteristics and flow field structure, the effects of boattail on Magnus effect are studied in details,and the mechanism of the Magnus effect for spinning projectile is analyzed. The results show that component of Magnus force along -z direction increases with θt and Lt/D due to the asymmetric distortion of the boundary layer. Meanwhile, the force along z-direction due to the asymmetric circumferential shear stress distortion decreases gradually with θt and Lt/D, while increasing with Ma. The force along -z direction due to the asymmetric distortion of axial and circumferential pressures increases with θt , Lt/D, and Ma for Ma≥1, while decreasing with Ma for Ma<1. Key

Key words: ordnancescienceandtechnology, Magnuseffect, angleofboattail, lengthofboattail

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