Examination of Forced Unsteady Separated Flow Fields on a Rotating Wind Turbine Blade

    Research output: NRELTechnical Report

    Abstract

    The wind turbine industry faces many problems regarding the construction of efficient and predictable wind turbine machines. Steady state, two-dimensional wind tunnel data are generally used to predict aerodynamic loads on wind turbine blades. Preliminary experimental evidence indicates that some of the underlaying fluid dynamic phenomena could be attributed to dynamic stall, or more specificallyto the generation of forced unsteady separated flow fields. A collaborative research effort between the University of Colorado and the National Renewable Energy Laboratory was conducted to systematically categorize the local and global effects of three-dimensional forced unsteady flow fields.
    Original languageAmerican English
    Number of pages247
    DOIs
    StatePublished - 1993

    NREL Publication Number

    • NREL/TP-422-4864

    Keywords

    • aerodynamic loads
    • combined experiment
    • dynamic stall
    • horizontal axis wind turbine (HAWT) blade
    • unsteady aerodynamics

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