Fast trailed and bound vorticity modeling of swept wind turbine blades

Ang Li*, Georg Pirrung, Helge Aa Madsen, Mac Gaunaa, Frederik Zahle

*Corresponding author for this work

    Research output: Contribution to journalConference articleResearchpeer-review

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    Abstract

    Passive load alleviation can be achieved through geometric bend-twist coupling, for example, by sweeping the blade backwards. The influence of the blade sweep on the trailing vorticity and bound vorticity is not modelled in the current fast aeroelastic wind turbine codes suitable for certification. A near wake trailed vorticity model which was coupled with a blade element momentum theory based aerodynamic model has been modified to take into account the blade sweep. The extended model is compared with the original near wake model, a blade element momentum (BEM) model and full rotor computational fluid dynamics (CFD) results for the modified IEA 10MW reference wind turbines. The steady-state loadings calculated from the extended model are in better agreements with CFD compared to the original model and the BEM for four different swept blades. It is also shown that the influence of the blade sweep on normal loading is not correctly modelled by BEM and this error will be inherited to the near wake model results. Thus, further modification to BEM will likely improve the predicted normal loading for swept blades, even if no near wake model is used.
    Original languageEnglish
    Article number062012
    Book seriesJournal of Physics: Conference Series
    Volume1037
    Issue number6
    Number of pages11
    ISSN1742-6596
    DOIs
    Publication statusPublished - 2018
    EventThe Science of Making Torque from Wind 2018 - Politecnico di Milano (POLIMI), Milan, Italy
    Duration: 20 Jun 201822 Jun 2018
    Conference number: 7
    http://www.torque2018.org/

    Conference

    ConferenceThe Science of Making Torque from Wind 2018
    Number7
    LocationPolitecnico di Milano (POLIMI)
    Country/TerritoryItaly
    CityMilan
    Period20/06/201822/06/2018
    Internet address

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