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低雷诺数下串列三圆柱涡激振动中的弛振现象及其影响因素

陈威霖 及春宁 许栋

陈威霖, 及春宁, 许栋. 低雷诺数下串列三圆柱涡激振动中的弛振现象及其影响因素[J]. 力学学报, 2018, 50(4): 766-775. doi: 10.6052/0459-1879-18-057
引用本文: 陈威霖, 及春宁, 许栋. 低雷诺数下串列三圆柱涡激振动中的弛振现象及其影响因素[J]. 力学学报, 2018, 50(4): 766-775. doi: 10.6052/0459-1879-18-057
Chen Weilin, Ji Chunning, Xu Dong. GALLOPING IN VORTEX-INDUCED VIBRATION OF THREE TANDEM CYLINDERS AT LOW REYNOLDS NUMBERS AND ITS INFLUENCING FACTORS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 766-775. doi: 10.6052/0459-1879-18-057
Citation: Chen Weilin, Ji Chunning, Xu Dong. GALLOPING IN VORTEX-INDUCED VIBRATION OF THREE TANDEM CYLINDERS AT LOW REYNOLDS NUMBERS AND ITS INFLUENCING FACTORS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 766-775. doi: 10.6052/0459-1879-18-057

低雷诺数下串列三圆柱涡激振动中的弛振现象及其影响因素

doi: 10.6052/0459-1879-18-057
基金项目: 国家自然科学基金(51579175, 51779172), NSFC-广东联合基金 (第二期) 超级计算科学应用研究专项资助(U1501501)和国家超级计算广州中心支持项目.
详细信息
    作者简介:

    *及春宁, 教授, 主要研究方向为流固耦合, 涡激振动, 泥沙运动. E-mail:cnji@tju.edu.cn

    通讯作者:

    及春宁

  • 中图分类号: P751,TV131.2;

GALLOPING IN VORTEX-INDUCED VIBRATION OF THREE TANDEM CYLINDERS AT LOW REYNOLDS NUMBERS AND ITS INFLUENCING FACTORS

  • 摘要: 对间距比为1.2和雷诺数为100的串列三圆柱涡激振动进行数值模拟, 发现在某个折合流速之后, 三圆柱的响应均呈现为随着折合流速增大而增大的弛振现象, 平衡位置偏移、低频振动以及旋涡脱落与圆柱运动之间的时机三个因素共同决定了弛振现象的出现. 进一步的研究发现, 串列三圆柱的弛振现象仅出现在质量比不大于2.0和雷诺数不大于100的工况下. 当质量比较大时, 串列三圆柱的平衡位置固定不变, 且圆柱的振动不规律, 使得旋涡脱落与圆柱运动的时机处于变化之中. 当雷诺数较高时, 最上游圆柱的平衡位置在折合流速较大时回到初始位置, 不再参与对圆柱振动的调节, 使得圆柱的振动响应不再规律, 旋涡脱落与圆柱运动的时机也一直处于变化之中.

     

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  • 刊出日期:  2018-07-18

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