An investigation was undertaken to identify the aerodynamik performance of five separate trailing-edge control devices and to evaluate their potential for wind turbine overspeed control applications. A modular two-dimensional wind tunnel model was constructed and evaluated during extensive wind tunnel testing. Aerodynamic lift, drag and suction coefficient data were acquired and analzyed for various control configurations and angles-of-attack. To further interpret their potential performance, the controls were evaluated numerically using a generic wind turbine geometry and a performance analysis computer program. On the basis of the results of the investigation, the Spoiler-Flap control configuration was deemed best suited for turbine braking applications. This particular control exhibited a good negative suction coefficient behavior over a broad angle-of-attack range and good turbine braking capabilities, especially at low tip-speed ratio conditions.
An evaluation of several wind turbine trailing-edge aerodynamic brakes
Bewertung verschiedener Hinterkantenbremsklappen von Windturbinen
1995
13 Seiten, 15 Bilder, 10 Quellen
Conference paper
English
Windturbine , Flügelprofil , Bremsen , Klappe , Bewertung , Windkanal , Modell , Test (Prüfung) , Auftrieb , Luftwiderstand , Anstellwinkel (Tragflügel) , Rechnerprogramm , Spoiler , Steuerung