Near wake behind circular cylinder of finite length on ground plane

Shiki Okamoto, Kazumi Tsunoda, Eiji Okada, Junichi Fujita

Research output: Contribution to journalArticle

Abstract

We describe an experimental study on the process involved in the disappearance of arch vortices shed from a circular cylinder of finite length, and the accompanying changes in the turbulent near wake, as a function of the aspect ratio of a circular cylinder. The experiment was carried out in a circuit-type wind tunnel having a 200 mm×200 mm working section of 2 000 mm length at the Reynolds number Re of 9 200. The time-mean velocity and turbulence intensities were measured by use of a laser Doppler velocimeter. Vortex formation was observed by flow visualization in a water channel at Re = 4 600. Consequently, details of the flow pattern in the turbulent near wake behind a circular cylinder were revealed, including information on shedding arch vortices.

Original languageEnglish
Pages (from-to)2923-2929
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume63
Issue number613
Publication statusPublished - 1997 Sep
Externally publishedYes

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near wakes
circular cylinders
Circular cylinders
turbulent wakes
Vortex flow
arches
Arches
vortices
laser doppler velocimeters
Laser Doppler velocimeters
flow visualization
wind tunnels
Flow visualization
Flow patterns
Wind tunnels
aspect ratio
Aspect ratio
Reynolds number
flow distribution
Turbulence

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Near wake behind circular cylinder of finite length on ground plane. / Okamoto, Shiki; Tsunoda, Kazumi; Okada, Eiji; Fujita, Junichi.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 63, No. 613, 09.1997, p. 2923-2929.

Research output: Contribution to journalArticle

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