Wake structures and vortex-induced vibrations of a long flexible cylinder -— Part 1: Dynamic response
- Creators
- Huera-Huarte, F. J.
- Bearman, P. W.
Abstract
Results showing the dynamic response of a vertical long flexible cylinder vibrating at low mode numbers are presented in this paper. The model had an external diameter of 16 mm and a total length of 1.5 m giving an aspect ratio of about 94, with Reynolds numbers between 1200 and 12 000. Only the lower 40% of its length was exposed to the water current in the flume and applied top tensions varied from 15 to 110 N giving fundamental natural frequencies in the range from 3.0 to 7.1 Hz. Reduced velocities based on the fundamental natural frequency up to 16 were reached. The mass ratio was 1.8 and the combined mass–damping parameter about 0.05. Cross-flow and in-line amplitudes, x–y trajectories and phase synchronisation, dominant frequencies and modal amplitudes are reported. Cross-flow amplitudes up to 0.7 diameters and in-line amplitudes over 0.2 were observed with dominant frequencies given by a Strouhal number of 0.16.
Additional Information
Copyright © 2009 Elsevier. Received 29 September 2008; accepted 24 March 2009. Available online 26 May 2009. This work was funded by Universitat Rovira i Virgili through Grant 2006AIRE-03. Special thanks are due to the Department of Aeronautics of Imperial College London.Additional details
- Eprint ID
- 16429
- DOI
- 10.1016/j.jfluidstructs.2009.03.007
- Resolver ID
- CaltechAUTHORS:20091021-114846068
- 2006AIRE-03
- Universitat Rovira i Virgili
- Created
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2009-10-21Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field