Morphing blade fluid-structure interaction

Stephen Daynes, Paul M. Weaver

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

7 Citations (Scopus)


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 an aramid honeycomb core covered with a silicone skin and is actuated using servo motors. The honeycomb core has a high stiffness in the thickness direction but is compliant in flapwise bending. These anisotropic 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 5.4×106. 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. A two-dimensional static aeroelastic model of the morphing flap was developed to analyze strains, predict actuator requirements and study fluid-structure interaction effects. The model was used to conduct parametric studies to further improve the flap design. Potential applications include wind turbine blade load alleviation and increased wind energy capture. ©2012 AIAA.

Translated title of the contributionMorphing Blade Fluid-Structure Interaction
Original languageEnglish
Title of host publicationCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
Pages1 - 15
Number of pages15
ISBN (Print)9781600869372
Publication statusPublished - 25 Apr 2012
Event53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Honolulu, HI, United States
Duration: 23 Apr 201226 Apr 2012


Conference53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Country/TerritoryUnited States
CityHonolulu, HI

Bibliographical note

Name and Venue of Event: Honolulu, HI
Conference Organiser: American Institute of Aeronautics and Astronautics
Other identifier: AIAA 2012-1667


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