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带扰动块的细长旋成体背部绕流数值模拟

刘克奇 李国辉 张浩南 张宴嘉

刘克奇, 李国辉, 张浩南, 等 . 带扰动块的细长旋成体背部绕流数值模拟[J]. 北京航空航天大学学报, 2021, 47(7): 1495-1504. doi: 10.13700/j.bh.1001-5965.2020.0676
引用本文: 刘克奇, 李国辉, 张浩南, 等 . 带扰动块的细长旋成体背部绕流数值模拟[J]. 北京航空航天大学学报, 2021, 47(7): 1495-1504. doi: 10.13700/j.bh.1001-5965.2020.0676
LIU Keqi, LI Guohui, ZHANG Haonan, et al. Numerical simulation of flow around slender body with disturbing block[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(7): 1495-1504. doi: 10.13700/j.bh.1001-5965.2020.0676(in Chinese)
Citation: LIU Keqi, LI Guohui, ZHANG Haonan, et al. Numerical simulation of flow around slender body with disturbing block[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(7): 1495-1504. doi: 10.13700/j.bh.1001-5965.2020.0676(in Chinese)

带扰动块的细长旋成体背部绕流数值模拟

doi: 10.13700/j.bh.1001-5965.2020.0676
详细信息
    通讯作者:

    李国辉, E-mail: ghleeauaf@sina.com

  • 中图分类号: V221;TJ760

Numerical simulation of flow around slender body with disturbing block

More Information
  • 摘要:

    为了更好地了解细长旋成体背部绕流非对称涡的形成机理,研究了头部带扰动块对细长旋成体背部绕流结构的影响,通过雷诺平均Navier-Stokes(RANS)法对细长旋成体模型在攻角5°~60°范围内进行仿真。在攻角分别为20°和30°时对是否添加扰动块模型进行对比,分析了不同截面绕流沿轴向位置的发展,提出了验证拓扑结构的一种方法,找到了各流态下奇点的位置,通过涡核位置对模型背部绕流的发展进行了分析。研究表明:添加已知规则扰动块可以加快各绕流结构间的转换速度,使非对称涡产生的攻角减小。

     

  • 图 1  尖拱-圆柱形细长旋成体模型

    Figure 1.  Pointed arch-cylindrical elongated slender body model

    图 2  计算域及网格划分

    Figure 2.  Computational domain and mesh division

    图 3  截面侧向力系数对比

    Figure 3.  Comparison of lateral force coefficients

    图 4  平均x涡量等值线

    Figure 4.  Mean x vorticity contour

    图 5  截面侧向力系数曲线

    Figure 5.  Cross-section lateral force coefficient curves

    图 6  物面压力轴向分布曲线

    Figure 6.  Axial distribution curves of surface pressure

    图 7  速度矢量分布

    Figure 7.  Velocity vector distribution

    图 8  细长旋成体绕流拓扑结构

    Figure 8.  Topological structure of flow around slender body

    图 9  壁面切向速度曲线

    Figure 9.  Tangential speed curves

    图 10  空间鞍点的纵向与横向位置

    Figure 10.  Vertical and horizontal positions of saddle point in space

    图 11  涡核位置

    Figure 11.  Vortex core position

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出版历程
  • 收稿日期:  2020-12-02
  • 录用日期:  2021-01-30
  • 网络出版日期:  2021-07-20

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