An Evaluation of Several Wind Turbine Trailing-Edge Aerodynamic Brakes

[+] Author and Article Information
S. Miller

National Institute for Aviation Research, Wichita State University, Wichita, KS 67260-0044

P. G. Migliore

Wind Technology Division, National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, CO 80401

G. A. Quandt

Wind Turbine Engineering Consultant, Pocatello, ID

J. Sol. Energy Eng 118(4), 198-203 (Nov 01, 1996) (6 pages) doi:10.1115/1.2871776 History: Received June 01, 1995; Revised October 01, 1995; Online February 14, 2008


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 aerodynamic performance data were acquired. To further interpret their potential, the controls were evaluated using a performance analysis 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.

Copyright © 1996 by The American Society of Mechanical Engineers
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