Some Observations of two Interfering VIV Circular Cylinders of Unequal Diameters in Tandem

Huang, Shan; Sworn, Andy

doi:10.1016/s1001-6058(10)60147-3

Cited by 22 publications

(1 citation statement)

References 14 publications

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“…By comparing with an isolated cylinder, they found that the suppression efficiency of the strakes was reduced due to the wake interference effect. Huang and Sworn 15 carried out the model test of a pair of elastically supported tandem cylinders of dissimilar diameters to investigate the hydrodynamic interaction between them, where the spacing between the two cylinders ranges from 1 to 10 times the larger cylinder diameter and found that both the lift and the cross-flow motion of the downstream cylinder were influenced by the vortex shedding behind the two cylinders and the spacing between the two cylinders. Huera-Huarte and Gharib 16 took a side-by-side arrangement of two vertical, high aspect ratio and low mass ratio cylinders as research object and performed the VIV model test in a free-surface water channel.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on coupled cross-flow and in-line vortex-induced vibration responses of two staggered circular cylinders

Zhang

Kang

Xiong

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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In order to better understand the vortex-induced vibration mechanism of multiple cylinders, this article takes a relatively simple case of two staggered circular cylinders as the embarkation point and investigates their vortex-induced vibration characteristics by model test. The experimental Reynolds number ranges from 22,000 to 88,000. The in-line gap L is set as 3.0 D, 3.6 D, 4.2 D and 5.5 D in turn, and the cross-flow gap T is set as 0.7 D, 1.1 D, 1.5 D, 1.9 D, 2.3 D and 2.7 D, respectively. By measuring the vibrating response in model test, the response differences between the two staggered cylinders and the isolated cylinder and the effects of the gaps are discussed. The results indicate that the variation trend of response of the upstream cylinder with reduced velocity is basically similar to that of the isolated cylinder. However, the downstream cylinder shows some great differences. When the in-line gap ratio L/ D is 3.6, the cross-flow amplitude curve of downstream cylinder changes from “single peak” to “double peaks” with the increase in cross-flow gap ratio T/ D, and in-line amplitude curve even shows four different kinds of forms. When L/ D is increasing, maximum amplitudes of the downstream cylinder in two directions also show an increasing trend, and the wake galloping phenomenon even appears in some conditions. Generally, the case of staggered cylinders is a generalized combination of two circular cylinders in tandem and side-by-side arrangements, and this article has extended the research scope of the double-cylinder vortex-induced vibration to arbitrary flow direction.

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Section: Introductionmentioning

confidence: 99%