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Flow interaction between a streamwise oscillating cylinder and a downstream stationary cylinder

Xu, S.J.; Gan, L.; Zhou, Y.

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Authors

S.J. Xu

Y. Zhou



Abstract

In this paper, we present some experimental results about the physical effects of a cylinder’s streamwise oscillation motion on a downstream one in a tandem arrangement. The upstream cylinder undergoes a controlled simple harmonic oscillation at amplitudes A/d = 0.2–0.8, where d is the cylinder diameter, and the frequency ratio of fe/fsfe/fs = 0–3.0, where fefe is the cylinder oscillation frequency and fsfs is the natural frequency of vortex shedding from a single stationary cylinder. Under these conditions, the vortex shedding is locked to the controlled oscillation motion. Flow visualisation using the planar laser-induced fluorescence and qualitative measurements using hot-wire anemometry reveal three distinct flow regimes behind the downstream cylinder. For fe/fs>(fe/fs)cfe/fs>(fe/fs)c , where (fe/fs)c(fe/fs)c is a critical frequency ratio which depends on A/d and Reynolds number Re, a so-called SA-mode occurs. The upstream oscillating cylinder generates binary vortices symmetrically arranged about the centreline, each containing a pair of counter-rotating vortices, and the downstream cylinder sheds vortices alternately at 0.5fe0.5fe . For 0.7–1.0

Citation

Xu, S., Gan, L., & Zhou, Y. (2016). Flow interaction between a streamwise oscillating cylinder and a downstream stationary cylinder. Experiments in Fluids, 57(11), Article 173. https://doi.org/10.1007/s00348-016-2265-y

Journal Article Type Article
Acceptance Date Oct 11, 2016
Online Publication Date Oct 22, 2016
Publication Date Nov 1, 2016
Deposit Date Oct 12, 2016
Publicly Available Date Mar 28, 2024
Journal Experiments in Fluids
Print ISSN 0723-4864
Electronic ISSN 1432-1114
Publisher Springer
Peer Reviewed Peer Reviewed
Volume 57
Issue 11
Article Number 173
DOI https://doi.org/10.1007/s00348-016-2265-y

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