Data/hora: 06/06/2024 00:57:15

Provedor de dados: 	5	
País: 	France	
Título: 	Experimental analysis of the shear flow effect on tidal turbine blade root force from three-dimensional mean flow reconstruction	
Autores: 	Gaurier, Benoit; Druault, Ph.; Ikhennicheu, Maria; Germain, Gregory.	
Data: 	2020-08	
Ano: 	2020	
Palavras-chave: 	Tidal turbine; Blade force; Turbulent wake; Experimental trials; PIV; POD.	
Resumo: 	In the main tidal energy sites like Alderney Race, turbulence intensity is high and velocity fluctuations may have a significant impact on marine turbines. To understand such phenomena better, a three-bladed turbine model is positioned in the wake of a generic wall-mounted obstacle, representative of in situ bathymetric variation. From two-dimensional Particle Image Velocimetry planes, the time-averaged velocity in the wake of the obstacle is reconstructed in the three-dimensional space. The reconstruction method is based on Proper Orthogonal Decomposition and enables access to a representation of the mean flow field and the associated shear. Then, the effect of the velocity gradient is observed on the turbine blade root force, for four turbine locations in the wake of the obstacle. The blade root force average decreases whereas its standard deviation increases when the distance to the obstacle increases. The angular distribution of this phase-averaged force is shown to be non-homogeneous, with variation of about 20% of its time-average during a turbine rotation cycle. Such force variations due to velocity shear will have significant consequences in terms of blade fatigue.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00643/75535/76540.pdf

DOI:10.1098/rsta.2020.0001

https://archimer.ifremer.fr/doc/00643/75535/	
Editor: 	The Royal Society	
Formato: 	application/pdf	
Fonte: 	Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences (1364-503X) (The Royal Society), 2020-08 , Vol. 378 , N. 2178 , P. 20200001 (14p.)	
Fonte: 	info:eu-repo/semantics/openAccess

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