Dependence of vortex shedding on inclination of a stationary cylinder

T. Zhou, Siti Fatin Mohd Razali, L. Cheng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Three-dimensional velocity in the wake of an inclined stationary circular cylinder was measured simultaneously using a multi-hot wire vorticity probe at x/d = 10, 20 and 40. The study aimed to examine the dependence of the wake characteristics on cylinder inclination angle α (= 0°∼45°). The validity of the independence principle (IP) for vortex shedding was also examined. It was found that the spanwise mean velocity Wβ, which represents tie three-dimentionality of the wake flow, increases monotonically with α. The vortex shedding frequency decreases with the increase of α. The Strouhal number (StN), obtained by using the velocity component normal to the cylinder axis, remains approximately a constant within the experimental uncertainly (±8%) when α is smaller than about 40°. The autocorrelation coefficients of the u and v velocity signals show apparent periodicity for all inclination angles. With increasing α, these coefficients decrease and approach zero quickly. In contrast, the autocorrelation coefficient of w increases with α, implying an enhanced three-dimensionality of the wake.

Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Asian and Pacific Coasts, APAC 2009
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages259-266
Number of pages8
Volume2
ISBN (Print)9814287970, 9789814287975
Publication statusPublished - 2010
Externally publishedYes
Event5th International Conference on Asian and Pacific Coasts, APAC 2009 - Singapore
Duration: 13 Oct 200916 Oct 2009

Other

Other5th International Conference on Asian and Pacific Coasts, APAC 2009
CitySingapore
Period13/10/0916/10/09

Fingerprint

Vortex shedding
Autocorrelation
Strouhal number
Circular cylinders
Vorticity
Wire

ASJC Scopus subject areas

  • Ocean Engineering

Cite this

Zhou, T., Mohd Razali, S. F., & Cheng, L. (2010). Dependence of vortex shedding on inclination of a stationary cylinder. In Proceedings of the 5th International Conference on Asian and Pacific Coasts, APAC 2009 (Vol. 2, pp. 259-266). World Scientific Publishing Co. Pte Ltd.

Dependence of vortex shedding on inclination of a stationary cylinder. / Zhou, T.; Mohd Razali, Siti Fatin; Cheng, L.

Proceedings of the 5th International Conference on Asian and Pacific Coasts, APAC 2009. Vol. 2 World Scientific Publishing Co. Pte Ltd, 2010. p. 259-266.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zhou, T, Mohd Razali, SF & Cheng, L 2010, Dependence of vortex shedding on inclination of a stationary cylinder. in Proceedings of the 5th International Conference on Asian and Pacific Coasts, APAC 2009. vol. 2, World Scientific Publishing Co. Pte Ltd, pp. 259-266, 5th International Conference on Asian and Pacific Coasts, APAC 2009, Singapore, 13/10/09.
Zhou T, Mohd Razali SF, Cheng L. Dependence of vortex shedding on inclination of a stationary cylinder. In Proceedings of the 5th International Conference on Asian and Pacific Coasts, APAC 2009. Vol. 2. World Scientific Publishing Co. Pte Ltd. 2010. p. 259-266
Zhou, T. ; Mohd Razali, Siti Fatin ; Cheng, L. / Dependence of vortex shedding on inclination of a stationary cylinder. Proceedings of the 5th International Conference on Asian and Pacific Coasts, APAC 2009. Vol. 2 World Scientific Publishing Co. Pte Ltd, 2010. pp. 259-266
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