Airfoil Computations using the γ - Reθ Model

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    Abstract

    The present work addresses the validation of the implementation of the Menter, Langtry et al. γ - θ corrrelation based transition model [1, 2, 3] in the EllipSys2D code. Firstly the 2. order of accuracy of the code is verified using a grid refinement study for laminar, turbulent and transitional computations. Based on this, an estimate of the error in the computations is determined to be approximately one percent in the attached region. Following the verification of the implemented model, the model is applied to four airfoils, NACA64- 018, NACA64-218, NACA64-418 and NACA64-618 and the results are compared to measurements [4] and computations using the Xfoil code by Drela et al. [5]. In the linear pre stall region good agreement is observed both for lift and drag, while differences to both measurements and Xfoil computations are observed in stalled conditions.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherDanmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi
    Number of pages18
    ISBN (Print)978-87-550-3751-9
    Publication statusPublished - 2009
    SeriesDenmark. Forskningscenter Risoe. Risoe-R
    Number1693(EN)
    ISSN0106-2840

    Keywords

    • Wind energy
    • Aeroelastic Design
    • Risø-R-1693
    • Risø-R-1693(EN)

    Cite this

    Sørensen, N. N. (2009). Airfoil Computations using the γ - Reθ Model. Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi. Denmark. Forskningscenter Risoe. Risoe-R, No. 1693(EN)