Wind Turbine Rotor-Tower Interaction Using an Incompressible Overset Grid Method

Frederik Zahle, Jeppe Johansen, Niels Sørensen, J. Michael R. Graham

    Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

    5 Citations (Scopus)


    In this paper 3D Navier-Stokes simulations of the flow over the NREL Phase VI turbine are presented. The computations are carried out using the structured grid, incompressible, finite volume flow solver EllipSys3D, which has been extended to include the use of overset grids. Computations are presented, firstly, on an isolated rotor, and secondly, on the downwind configuration of the turbine, which includes modelling of the rotor, tower and tunnel floor boundary. It is demonstrated that the solver successfully captures the unsteady insteraction between the rotor blades and the tower wake for the downwind configuration, and that the computations are in good agreement with the experimental data available. Finally, the results show that the rotor has a strong effect on the tower shedding frequency, causing under certain flow conditions vortex lock-in to take place on the upper part of the tower.

    Original languageEnglish
    Title of host publicationThe Proceedings of the 45th AIAA Aerospace Sciences Meeting and Exhibit
    Number of pages21
    PublisherAmerican Institute of Aeronautics and Astronautics
    Publication date2007
    Publication statusPublished - 2007
    EventAIAA Aerospace Sciences Meeting and Exhibit - Reno, Nevada, United States
    Duration: 8 Jan 200711 Jan 2007
    Conference number: 45


    ConferenceAIAA Aerospace Sciences Meeting and Exhibit
    CountryUnited States
    CityReno, Nevada

    Bibliographical note

    See also


    • 3D Navier-Stokes
    • Wind turbines

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