Evaluation of Several Wind Turbine Trailing-Edge Aerodynamic Brakes

    Research output: Contribution to journalArticlepeer-review


    An investigation was undertaken to identify the aerodynamic performance of five separate trailing-edge control devices and to evalutate their potential for wind turbine overspeed control applications. A modular two-dimensional wind tunnel model was constructed and aerodynamic performance data were acquired. To further interpret their potential, the controls were evaluated using a performanceanalysis computer program and a generic wind turbine geometry. On the basis of the investigation results, the Spoiler-Flap control configuration was deemed best suited for turbine braking applications. This particular control exhibited a good suction coefficient behavior over a broad angle-of-attack range and good turbine braking capabilities, especially at low tip-speed ratios.
    Original languageAmerican English
    Pages (from-to)198-203
    Number of pages6
    JournalJournal of Solar Energy Engineering, Transactions of the ASME
    Issue number4
    StatePublished - 1996

    NREL Publication Number

    • NREL/JA-440-22987


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