Journal
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
Volume 98, Issue 12, Pages 712-723Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jweia.2010.06.005
Keywords
Active; Load; Control; Wind; Gust alleviation; Small; Trailing-edge flap; Microtab
Categories
Funding
- Engineering and Physical Sciences Research Council (EPSRC)
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This paper presents the results of a numerical and experimental investigation into the use of a small rapidly actuated actively controlled trailing-edge flap (4% chord) to alleviate the unsteady loading experienced by wind turbine blades due to atmospheric turbulence and the atmospheric boundary layer The computational investigation demonstrated that the rejection of realistic flow disturbances should be feasible with the use of load measurements on the blade and the feedback control of a small flap The experimental prototype subsequently successfully rejected intentionally introduced flow disturbances from the vortex street of a square block located upstream of a sting-mounted strain-gauged wing fitted with flap This application of control provided a very significant reduction in the unsteady loading experienced (81% of Cams) The findings show the potential of this method of load control for the rejection of unsteady aerodynamic loading by the sole use of load measurements from the wing for simple feedback control (PID/LQG) (C) 2010 Published by Elsevier Ltd
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