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

G. Sedlacek, C. Butz, C. Gromke

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Abstract

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
Original languageEnglish
Title of host publicationProceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic
Place of PublicationPrague
Pages1-9
Publication statusPublished - 2005

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Circular cylinders
Flow fields
Reynolds number
Flow velocity
Turbulent flow
Vortex flow
Turbulence

Cite this

Sedlacek, G., Butz, C., & Gromke, C. (2005). Aeroelastic effects on externally forced circular cylinders and their analytical acquisition by coupled-oscillator models. In Proceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic (pp. 1-9). Prague.
Sedlacek, G. ; Butz, C. ; Gromke, C. / Aeroelastic effects on externally forced circular cylinders and their analytical acquisition by coupled-oscillator models. Proceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic. Prague, 2005. pp. 1-9
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abstract = "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",
author = "G. Sedlacek and C. Butz and C. Gromke",
year = "2005",
language = "English",
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booktitle = "Proceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic",

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Sedlacek, G, Butz, C & Gromke, C 2005, Aeroelastic effects on externally forced circular cylinders and their analytical acquisition by coupled-oscillator models. in Proceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic. Prague, pp. 1-9.

Aeroelastic effects on externally forced circular cylinders and their analytical acquisition by coupled-oscillator models. / Sedlacek, G.; Butz, C.; Gromke, C.

Proceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic. Prague, 2005. p. 1-9.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

TY - GEN

T1 - Aeroelastic effects on externally forced circular cylinders and their analytical acquisition by coupled-oscillator models

AU - Sedlacek, G.

AU - Butz, C.

AU - Gromke, C.

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N2 - 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

AB - 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

M3 - Conference contribution

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EP - 9

BT - Proceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic

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Sedlacek G, Butz C, Gromke C. Aeroelastic effects on externally forced circular cylinders and their analytical acquisition by coupled-oscillator models. In Proceedings of the Fourth European - African Conference on Wind Engineering,( EACWE4), 11-15 July 2005, Prague, Czech Republic. Prague. 2005. p. 1-9