Lift of a rotating circular cylinder in unsteady flows

Stefan Carstensen, Xerxes Mandviwalla, Luca Vita, Uwe Schmidt Paulsen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    A cylinder rotating in steady current experiences a lift known as the Magnus effect. In the present study the effect of waves on the Magnus effect has been investigated. This situation is experienced with the novel floating offshore vertical axis wind turbine (VAWT) concept called the DEEPWIND concept, which incorporates a rotating spar buoy and thereby utilizes seawater as a roller-bearing. The a priori assumption and the results suggest that the lift in waves, to a first approximation, may be represented by a formulation similar to the well-known Morison formulation. The force coefficients are experimentally found to primarily depend on the ratio between the surface speed of the cylinder and the outer flow velocity. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE).
    Original languageEnglish
    Title of host publicationProceedings of the International Offshore and Polar Engineering Conference 2012
    PublisherInternational Society of Offshore & Polar Engineers
    Publication date2012
    Pages388-395
    ISBN (Print)9781880653944
    Publication statusPublished - 2012
    Event22nd International Offshore and Polar Engineering Conference - Rhodes, Greece
    Duration: 17 Jul 201221 Jul 2012
    http://www.isope.org

    Conference

    Conference22nd International Offshore and Polar Engineering Conference
    Country/TerritoryGreece
    CityRhodes
    Period17/07/201221/07/2012
    Internet address

    Keywords

    • Circular cylinders
    • Lift
    • Rotors
    • Seawater
    • Spar platforms
    • Wind turbines
    • Aerodynamics
    • DEEPWIND concept
    • Floating vertical axis wind turbine
    • Magnus effect
    • Rotating cylinder
    • Waves
    • Force coefficients
    • Rotating circular cylinders
    • Rotating cylinders
    • Steady current
    • Surface speed
    • Vertical axis wind turbines

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