Nikitas, N and Macdonald, JHG (2015) Aerodynamic forcing characteristics of dry cable galloping at critical Reynolds numbers. European Journal of Mechanics B: Fluids, 49 (Part A). 243 - 249. ISSN 0997-7546
Abstract
This article attempts to highlight characteristics of the aerodynamic forcing on a rigid circular cylinder experiencing dry galloping vibrations. Observations from a series of wind tunnel tests are studied comparatively with the literature on rain–wind cable vibrations and on flow past inclined lifting bodies such as missiles, for drawing similarities. Unsteadiness and spatial variation of the flow, both previously undermined, are significant during the large cylinder motions recorded. Thus, they are here suspected to play a role in triggering unstable behaviour. Instabilities were restricted to specific ranges of cable-wind angles and Reynolds numbers. The transitional features identified refute the view of simple bursting separation bubbles that rhythmically produce lift and suggest that there is a multitude of paths for energetically feeding dry galloping. Finally explanations are provided and a mechanism incorporating unstable features is proposed for future modelling.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014, Elsevier. This is an author produced version of a paper published in European Journal of Mechanics B: Fluids. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Cable vibrations; galloping; critical flow; Reynolds number; aerodynamic damping |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) > Institute for Resilient Infrastructure (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Nov 2014 11:36 |
Last Modified: | 21 Apr 2015 06:36 |
Published Version: | http://dx.doi.org/10.1016/j.euromechflu.2014.09.00... |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.euromechflu.2014.09.005 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:81008 |