Aerodynamic Sources of Acoustic Radiation from a Single MOD-2 Wind Turbine

    Research output: NRELTechnical Report


    Results are presented of an extensive acoustic measurement program conducted recently using one of the MOD-2 wind turbines in the DOE/NASA/BPA cluster at Goodnoe Hills, Washington. A summary of low-frequency acoustic emission characteristics is also presented. The MOD-2 acoustic emissions are compared with other large-scale turbines, including the DOE/NASA MOD-OA, the MOD-1 horizontal-axis, andthe DOE/Sandia vertical-axis designs. The unsteady aerodynamic forcing, in response to certain freestream turbulence characteristics, is identified as the source of observed acoustic and rotor aeroelastic responses.
    Original languageAmerican English
    Number of pages10
    StatePublished - 1983

    NREL Publication Number

    • NREL/TP-215-2009


    • acoustic sources
    • wind


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