Adaptive trailing edge for load alleviation on wind turbine blades

S Daynes, PM Weaver

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)


Wind tunnel tests have been conducted on a 1.3 m chord NACA 63-418 blade section fitted with an adaptive trailing edge flap. The 20% chord flap has a highly anisotropic aramid honeycomb core covered with a silicone skin and is actuated using servo motors. Honeycomb structures are known for their anisotropic properties. They display a high out-of-plane stiffness but are still compliant in-plane. These properties offer a potential solution for the conflicting design requirements found in morphing trailing edge structures. Static and dynamic tests were performed on the adaptive blade section up to a Reynolds number of 5.4×10^6. Tests have shown that deflecting the flap from −10° to +10° changes the blade section lift coefficient by 1.0 in non-stalled conditions. Dynamic tests have shown the flap to be capable of operating up to 9°/s using a 15 V power supply. Potential applications include wind turbine blade load alleviation and increased wind energy capture.
Translated title of the contributionAdaptive trailing edge for load alleviation on wind turbine blades
Original languageEnglish
Title of host publication22nd International Conference on Adaptive Structures and Technologies (ICAST), Corfu, Greece
Pages1 - 12
Number of pages12
Publication statusPublished - 9 Oct 2011

Bibliographical note

Name and Venue of Event: Imperial Hotel, Corfu, Greece
Conference Organiser: ICAST


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