Aeroelastic effects on externally forced circular cylinders and their analytical acquisition by coupled-oscillator models

G. Sedlacek, C. Butz, C. Gromke

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademic

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ABSTRACT: Experimental results of a rigid, smooth-surfaced circular cylinder forced to oscillate in turbulent flow (I = 5%) are presented. A large influence of the turbulence of the oncoming flow is cognizable. The characteristic flow field corresponding to the critical Reynolds’ number range is shifted to smaller flow velocities than the Reynolds’ number criterion indicates. However, aeroelastic effects are measured. Moreover, coupled oscillator models of vortex-induced vibrations of elastically mounted cylinders (lift- resp. wake-oscillator models) are enlarged to externally forced cylinders and discrepancies between these two kinds of vibrations are highlighted. Resulting from measurements an approach to a more realistic acquisition of the flow field behaviour by the incorporation of the correlation length for coupled oscillator models is suggested
Originele taal-2Engels
TitelProceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic
Plaats van productiePrague
Pagina's1-9
StatusGepubliceerd - 2005

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