不同入射角下圆柱涡激振动的数值研究

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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.

Key words： vortex-induced vibration incidence trajectory flow pattern fourth-order runge kutta method

Received: 08 November 2021 Published: 28 March 2023

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	Articles by authors
	JIANG Zecheng
	GAO Yun
	LIU Lei
	CHAI Shenglin

Cite this article:

JIANG Zecheng,GAO Yun,LIU Lei, et al. 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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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I6/289

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