不同入射角下圆柱涡激振动的数值研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (6) : 289-297.

论文

不同入射角下圆柱涡激振动的数值研究

姜泽成，高云，刘磊，柴盛林

作者信息 +

Numerical study on the vortex-induced vibration of a circular cylinder at different incidences

JIANG Zecheng, GAO Yun, LIU Lei, CHAI Shenglin

Author information +

文章历史 +

摘要

采用二维非定常雷诺平均N-S方程和剪应力运输k-ω模型，结合四阶龙格库塔法，选取四种不同入射角(α)对二自由度圆柱涡激振动响应影响进行数值研究。比较了不同来流角度下圆柱涡激振动幅值、结构振动频率、锁定区间、漩涡脱落模式、斯特劳哈尔数、水动力系数和捕能效率的影响。数值结果表明，来流角度变化会使圆柱涡激振动响应产生多频率特性，且随着来流角度的增加y方向振幅逐渐减小，x方向振幅逐渐增大。不同来流角度下涡激振动响应均产生明显的锁定现象，锁定区间宽度随来流角度的变化不明显。但随着来流角度的增加，y方向力系数均方根与x方向力系数均值均有下降的趋势。

Abstract

The effects of four different inflow angles (α) on the vortex-induced vibration response of a two-degree-of-freedom cylinder were studied using the two-dimensional unsteady Reynolds-averaged N-S equation and shear stress transport k-ω model, combined with the fourth-order Runge-Kutta method. The effects of different incoming flow angles on the amplitude of vortex-induced vibration, structural vibration frequency, locking interval, vortex shedding mode, Strouhal number, hydrodynamic coefficient and energy capture efficiency are compared. The numerical results show that the change of the incoming flow angle will make the vortex-induced vibration response of the cylinder produce multi-frequency characteristics, and with the increase of the incoming flow angle, the amplitude in the y direction gradually decreases and the amplitude in the x direction gradually increases. Different incoming flow angles have obvious locking phenomenon, but the width of locking interval has no obvious change on incoming flow angle. With the increase of inflow angle, the root mean square of force coefficient in y direction and the mean value of force coefficient in x direction both tend to decrease.

导出引用

姜泽成，高云，刘磊，柴盛林. 不同入射角下圆柱涡激振动的数值研究[J]. 振动与冲击, 2023, 42(6): 289-297

JIANG Zecheng, GAO Yun, LIU Lei, CHAI Shenglin. Numerical study on the vortex-induced vibration of a circular cylinder at different incidences[J]. Journal of Vibration and Shock, 2023, 42(6): 289-297

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