Experimental Investigation of Airfoil Models for Use on Wind Turbine Blades

    Research output: Contribution to conferencePaper

    Abstract

    In a continuing effort to provide experimental data for wind turbine airfoils, tests were conducted at the Ohio State University, Aeronautical and Astronautical Research Laboratory in the 3X5 subsonic wind tunnel on the National Renewable Energy Laboratory S814, S812, and S810 airfoil sections. The airfoils were tested for steady state and for model oscillating conditions having a test matrixwhich included Reynolds numbers of 0.75 through 1.5 million; however, for brevity, only the result for 1 million Reynolds number are included. The unsteady data discussed includes ..+-..10..degree..sinusoidal angle of attack oscillation at 0.6 and 1.8 Hz at mean angles of attack of 8..degree.., 14..degree.., and 20..degree. In addition, the effect of the application of leading edge gritroughness was studied. In general, application of leading edge grit roughness reduced the maximum lift coefficient and zero lift pitching moment coefficient and increased the minimum drag coefficient for the steady state data. For the unsteady cases, there were increases in the maximum lift and pitching moment coefficient performance for all cases in comparison to the steady state data and ahysteresis behavior due to the oscillating motion.
    Original languageAmerican English
    Pages139-148
    Number of pages10
    StatePublished - 1995
    EventWindpower '95: Annual Conference and Exhibition of the American Wind Energy Association - Washington, D.C.
    Duration: 26 Mar 199530 Mar 1995

    Conference

    ConferenceWindpower '95: Annual Conference and Exhibition of the American Wind Energy Association
    CityWashington, D.C.
    Period26/03/9530/03/95

    Bibliographical note

    Work performed by the Ohio State University, Columbus, Ohio

    NREL Publication Number

    • NREL/CP-21809

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