The effect of fins on vortex shedding from a cylinder in cross-flow

Ziada, Samir; Jebodhsingh, Damon; Weaver, David; Eisinger, Frantisek L.

doi:10.1016/j.jfluidstructs.2004.12.003

Cited by 25 publications

(25 citation statements)

References 20 publications

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“…The span of the tube is 500 mm. The fins are distributed regularly along the tube axis, which have not the irregular wavy pattern like the serrated fin distribution along the tube axis (10) . These fin tubes have the same geometry as those The other hot-wire probe is installed when the cross correlation between the velocity fluctuations at two different locations is measured.…”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 98%

“…It is understood that the fin increase the spanwise scale of vortex compared with the case of the bare tube of D=31.8mm. Therefore it is considered that the vortex shedding from the fin tube has large scale structure in Z-direction regardless of the presence of the fins which has not the irregular wavy pattern like the serrated fin distribution along the tube axis (10) . The existence of a three-dimensional vortex structure corresponding to the fin position is not clear.…”

Section: Spanwise Vortex Structurementioning

confidence: 99%

“…Nemoto et al (3)~ (5) suggested that the acoustic resonance was generated even in fin tube banks. Chen (6) , Kouba (7) , Hamakawa et al (8) , Kawaguchi et al (9) and Ziada et al (10) have shown that the vortex shedding was remarkably observed in fin tube banks or in the wake of a single fin tube. Mair et al (11) , Suzuki et al (12) , Hamakawa et al (13) and Ziada et al (10) have reported that the vortex shedding frequency was correlated with the tube effective diameter.…”

Section: Introductionmentioning

confidence: 99%

“…Hamakawa et al (13) found that the spanwise scale of the vortex to be considerably larger than the pitch of the fins. Ziada et al (10) have shown that the correlation length in the wake of the serrated fin tube was found to change with angular rotation of the tube around its axis. This phenomenon seems to be related to an irregular wavy pattern of the serrated fin distribution along the tube axis.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Vortex Shedding from a Circular Cylinder with Spiral Fin

Hamakawa

Nakashima

Kudo

et al. 2008

JFST

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The effect of simple spiral fin around a bare tube on Karman vortex shedding was experimentally investigated. We measured the distributions of the mean velocity, the intensity of velocity fluctuation, the spectrum of velocity fluctuation and the coherence distribution of Karman vortex in the spanwise direction. And the flow around a fin tube was visualized by using smoke wire technique. As a result it was made clear that the periodic velocity fluctuation caused by Karman vortex was remarkably observed in the wake of the fin tube although the fin was mounted around a bare tube with a large pitch along the tube axis. The vortices in the near-wake of the fin tube make cells structure with the scale of the pitch length of the fins. The rotation axis of each vortex was inclined against the tube axis. The large scale vortex was formed by the coalescence of the vortex cells. Therefore, the spanwise scale of the vortex in the wake of the fin tube was larger than one pitch of the fins.

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Section: Experimental Apparatus and Proceduresmentioning

confidence: 98%

Section: Spanwise Vortex Structurementioning

confidence: 99%