A CFD study into the influence of unsteady aerodynamic interference on wind turbine surge motion |
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| Affiliation: | 1. University of Enviromental and Life Sciences, The Faculty of Life Sciences and Technology, Institute of Agricultural Engineering, Wroc?aw, Poland;2. University of Enviromental and Life Sciences, The Faculty of Enviromental Engineering and Geodesy, Department of Mathematics, Wroc?aw, Poland;3. Wroc?aw University of Technology, Faculty of Computer Science and Management, Wroc?aw, Poland;1. SEAG, Facultad de Física Universidad de Santiago Compostela, Rúa Xosé María Fernández Núñez S/N, Santiago de Compostela 15782, Spain;2. Instituto Tecnológico de Sonora, Ave. Antonio Caso S/N, Col. Villa ITSON, Cd. Obregón, Mexico;3. Escuela Superior Politécnica del Litoral, CDTS-FIMCP, Vía Perimetral Km. 30.5, Guayaquil, Ecuador;4. Grupo de Física No Lineal, Universidad de Santiago Compostela, Spain;1. University of Malta, Faculty of Engineering, Department of Mechanical Engineering, Msida, MSD 2080, Malta;2. University of Malta, Faculty of the Built Environment, Department of Environmental Design, MSD 2080, Malta;1. Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow, UK;2. State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | To improve knowledge of the unsteady aerodynamic characteristics and interference effects of a floating offshore wind turbine (FOWT), this article focuses on the platform surge motion of a full configuration wind turbine with the rotating blades, hub, nacelle, and tower shapes. Unsteady aerodynamic analyses considering the moving motion of an entire configuration wind turbine have been conducted using an advanced computational fluid dynamics (CFD) and a conventional blade element momentum (BEM) analyses. The present CFD simulation is based on an advanced overset moving grid method to accurately consider the local and global motion of a three-dimensional wind turbine. The effects of various oscillation frequencies and amplitudes of the platform surge motion have been widely investigated herein. Three-dimensional unsteady flow fields around the moving wind turbine with rotating blades are graphically presented in detail. Complex flow interactions among blade tip vortices, tower shedding vortices, and turbulent wakes are physically observed. Comparisons of different aerodynamic analyses under the periodic surge motions are summarized to show the potential distinction among applied numerical methods. The present result indicates that the unsteady aerodynamic thrust and power tend to vary considerably depending on the oscillation frequency and amplitude of the surge motion. |
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| Keywords: | Unsteady aerodynamics Surge motion Floating offshore wind turbine Computational fluid dynamics Over-set grid Blade element momentum theory |
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