3D Navier-Stokes Simulations of a rotor designed for Maximum Aerodynamic Efficiency

Jeppe Johansen, Helge. Aa. Madsen, Mac Gaunaa, Christian Bak, Niels Sørensen

    Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

    2 Citationer (Scopus)

    Abstrakt

    The present paper describes the design of a three-bladed wind turbine rotor taking into account maximum aerodynamic efficiency only and not considering structural as well as offdesign issues. The rotor was designed assuming constant induction for most of the blade span, but near the tip region a constant load was assumed. The rotor design was obtained using an Actuator Disc model and was subsequently verified using both a free wake Lifting Line method and a full 3D Navier-Stokes solver. Excellent agreement was obtained using the three models. Global mechanical power coefficient, CP, reached a value of slightly above 0.51, while global thrust coefficient, CT, was 0.87. The local power coefficient, Cp, increased to slightly above the Betz limit on the inner part of the rotor as well as the local thrust coefficient, Ct, increased to a value above 1.1. This agrees well with the theory of de Vries which states that including the effect of the low pressure behind the centre of the rotor stemming from the increased rotation both Cp and Ct will increase towards the root. Towards the tip both Cp and Ct decrease due to tip corrections as well as drag.
    OriginalsprogEngelsk
    TitelProceedings of the 45th AIAA Aerospace Sciences Meeting and Exhibit
    Antal sider11
    ForlagAmerican Institute of Aeronautics and Astronautics
    Publikationsdato2007
    StatusUdgivet - 2007
    BegivenhedThe AIAA Aerospace Sciences Meeting and Exhibit - Reno, Nevada, USA
    Varighed: 8 jan. 200711 jan. 2007
    Konferencens nummer: 45

    Konference

    KonferenceThe AIAA Aerospace Sciences Meeting and Exhibit
    Nummer45
    LandUSA
    ByReno, Nevada
    Periode08/01/200711/01/2007

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