An evaluation of several wind turbine trailing-edge aerodynamic brakes
- Wichita State Univ., KS (United States). National Institute for Aviation Research
- National Renewable Energy Lab, Golden, CO (United States). Wind Technology Division
- Colorado State Univ., Fort Collins, CO (United States). College of Engineering
An investigation was undertaken to identify the aerodynamic 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 analyzed 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.
- OSTI ID:
- 93009
- Report Number(s):
- CONF-950116--; ISBN 0-7918-1294-4
- Country of Publication:
- United States
- Language:
- English
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