Navier-Stokes Computations for an S809 Airfoil with Aerodynamic Control Devices

    Research output: Contribution to conferencePaper

    Abstract

    The flow about an S809 airfoil with two aerodynamic control devices including a vented aileron and a spoiler-flap was investigated with the compressible and incompressible Navier-Stokes equations. The one-equation turbulence models of Baldwin-Barth and Spalart-Allmaras were used to perform fully turbulent flow computations. Flow conditions included Mach number of 0.13, Reynolds number of 1million based on airfoil chord and angles of attach of 0, 6, 12, 27, 35, and 45 degrees. Control deflections for this study were 60 degrees, 90 degrees for the spoiler-flap and -60 deg., -90 deg. for the vented aileron. Most of the selected angles of attack and control deflections are representative of horizontal axis wind turbine conditions during aerodynamic braking. At these conditions theflow about the airfoil and control surface is unsteady and includes regions of extensive flow separation. The computational results were found to be in good qualitative agreement with the experimental data. In many cases, however, the magnitudes of the computed aerodynamic coefficients did not correlate well with the experiment.
    Original languageAmerican English
    Pages100-112
    Number of pages13
    StatePublished - 1998
    Event1998 ASME Wind Energy Symposium Technical 36th AIAA Aerospace Sciences Meeting and Exhibit - Reno, Nevada
    Duration: 12 Jan 199815 Jan 1998

    Conference

    Conference1998 ASME Wind Energy Symposium Technical 36th AIAA Aerospace Sciences Meeting and Exhibit
    CityReno, Nevada
    Period12/01/9815/01/98

    Bibliographical note

    Work performed by Wichita State University, Wichita, Kansas

    NREL Publication Number

    • NREL/CP-25537

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