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An experimental and numerical study on the aerodynamic performance of vibrating wind turbine blade with frequency-domain method

Win Naung, Shine; Nakhchi, Mahdi Erfanian; Rahmati, Mohammad

An experimental and numerical study on the aerodynamic performance of vibrating wind turbine blade with frequency-domain method Thumbnail


Authors

Mahdi Erfanian Nakhchi

Mohammad Rahmati



Abstract

Abstract. A highly efficient nonlinear frequency-domain solution method is proposed and employed to investigate the aerodynamic and aeromechanical performances of an oscillating wind turbine blade aerofoil in this study. Extensive validations of a frequencydomain method against an experiment as well as a typical time-domain solution method are provided in this paper. An experiment is also designed and conducted to measure pressure distributions over an aerofoil as well as to validate the numerical model. Unsteady pressure distributions and aeroelasticity parameters of the oscillating NACA0012 aerofoil are computed at various angles of attack and Reynolds numbers. Results indicate that the difference of unsteady pressure distributions between the two surfaces of the aerofoil becomes larger as the angle of attack is increased, whereas the flow separation on the suction surface is reduced by raising the Reynolds number. The turbulent flow develops in the downstream region due to the laminar vortex shedding at lower Reynolds numbers. It is also revealed that the Reynolds number has an impact on the aeroelasticity, and the aerodynamic damping value is larger at higher Reynolds numbers. The comparison between the frequency-domain method and the time-domain method shows that the frequency-domain method is not only accurate but also computationally very efficient as the computation time is reduced by 90%.

Journal Article Type Article
Acceptance Date Jun 3, 2021
Online Publication Date Jun 4, 2021
Publication Date Jul 31, 2021
Deposit Date Oct 16, 2023
Publicly Available Date Oct 17, 2023
Journal Journal of Applied and Computational Mechanics
Electronic ISSN 2168-9679
Publisher OMICS International
Peer Reviewed Peer Reviewed
Volume 7
Issue 3
Pages 1737-1750
DOI https://doi.org/10.22055/jacm.2021.37406.3011
Public URL https://uwe-repository.worktribe.com/output/11181692

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