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单窄条控制件对横向振荡柱体尾流 2P模式 旋涡脱落的改变

曹梦圆 金华斌 邵传平

曹梦圆, 金华斌, 邵传平. 单窄条控制件对横向振荡柱体尾流 2P模式 旋涡脱落的改变[J]. 力学学报, 2018, 50(4): 734-750. doi: 10.6052/0459-1879-18-005
引用本文: 曹梦圆, 金华斌, 邵传平. 单窄条控制件对横向振荡柱体尾流 2P模式 旋涡脱落的改变[J]. 力学学报, 2018, 50(4): 734-750. doi: 10.6052/0459-1879-18-005
Cao Mengyuan, Jin Huabin, Shao Chuanping. THE SINGLE STRIP-INDUCED CHANGE OF 2P-MODE VORTEX SHEDDING IN THE WAKE OF A TRANSVERSELY OSCILLATING CYLINDER[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 734-750. doi: 10.6052/0459-1879-18-005
Citation: Cao Mengyuan, Jin Huabin, Shao Chuanping. THE SINGLE STRIP-INDUCED CHANGE OF 2P-MODE VORTEX SHEDDING IN THE WAKE OF A TRANSVERSELY OSCILLATING CYLINDER[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 734-750. doi: 10.6052/0459-1879-18-005

单窄条控制件对横向振荡柱体尾流 2P模式 旋涡脱落的改变

doi: 10.6052/0459-1879-18-005
基金项目: 国家自然科学基金资助项目(11172286, 11572305).
详细信息
    作者简介:

    *邵传平,教授,主要研究方向:流动控制,植物力学. E-mail: shaocp@cjlu.edu.cn

    通讯作者:

    邵传平

  • 中图分类号: O35;

THE SINGLE STRIP-INDUCED CHANGE OF 2P-MODE VORTEX SHEDDING IN THE WAKE OF A TRANSVERSELY OSCILLATING CYLINDER

  • 摘要: 横向强迫振荡柱体尾流控制是柱体涡激振动控制的基础,在海洋、土木等工程中具有重要意义. 横向强迫振荡柱体尾流中存在一种锁频旋涡脱落模式,即在一个振荡周期内柱体上、下侧各脱落旋转方向相反的一对涡,称为2P模式. 本文将相对宽度b/D=0.32的窄条控制件置于横向强迫振荡柱体下游,对振幅比A/D=1.25, 无量纲振频f_e D/V_∞=0.22,雷诺数Re=1 200的2P模式旋涡脱落进行干扰,并通过改变控制件位置,研究旋涡的变化规律. 采用二维大涡模拟和实验验证方法进行研究,在控制件位置范围0.8≤X/D≤3.2, 0.4≤Y/D≤3.2内,得到了2P, 2S, P+S和另外6种新发现的旋涡脱落模式,并对各模式旋涡的形成过程作了详细描述. 在控制件位置平面上给出了各旋涡模式的存在区域,画出了旋涡脱落强度的等值线图,并发现在一个相当大的区域内,旋涡脱落强 度可减小一半以上,尾流变窄. 发现柱体大幅振荡引起的横向剪切流在旋涡生成中起关键作用. 探讨了控制件对横向剪切流的影响,分析了控制件在每种旋涡模式形成中的作用机制.

     

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出版历程
  • 收稿日期:  2018-01-01
  • 刊出日期:  2018-07-18

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