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Experimental study of bathymetry generated turbulence on tidal turbine behaviour ArchiMer
Gaurier, Benoit; Ikhennicheu, Maria; Germain, Gregory; Druault, Philippe.
In high flow velocity areas like those suitable for tidal applications, turbulence intensity is high and flow variations may have a major impact on tidal turbine behaviour. A three-bladed horizontal axis turbine model (scale 1:20) is positioned in the wake of a square wall-mounted cylinder, representative of specific in situ bathymetric variation, to experimentally study these effects in a current flume tank. Local and global loads are acquired in synchronization with velocity measurements to study the turbine response to flow fluctuations. Velocity measurements need to be obtained close to the turbine, contrary to what is commonly considered, to properly correlate velocity and loads fluctuations. Results show that the loads phase average and their...
Tipo: Text Palavras-chave: Turbulence; Experimental trials; Wall-mounted cylinder; PIV; LDV; Horizontal axis tidal turbine.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00628/73966/73325.pdf
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Tidal Energy Round Robin Tests: A Comparison of Flow Measurements and Turbine Loading ArchiMer
Martinez, Rodrigo; Gaurier, Benoit; Ordonez-sanchez, Stephanie; Facq, Jean-valery; Germain, Gregory; Johnstone, Cameron; Santic, Ivan; Salvatore, Francesco; Davey, Thomas; Old, Chris; Sellar, Brian G..
A Round Robin Tests program is being undertaken within the EC MaRINET2 initiative. This programme studies the used facility influence can have on the performance evaluation of a horizontal axis tidal turbine prototype when it is operated under wave and current conditions. In this paper, we present the design of experiments that is used throughout the work programme and the results related to the flow characterisation obtained at the Ifremer wave and current circulating tank, the Cnr-Inm wave towing tank and the ocean research facility FloWave. These facilities have been identified to provide adequate geometric conditions to accommodate a 0.724 m diameter turbine operating at flow velocities of 0.8 and 1.0 m/s. The set-up is replicated in each of the...
Tipo: Text Palavras-chave: Marine energy; Wave and current interactions; Round Robin tests; Flow measurements; Horizontal axis tidal turbine; Uncertainty analysis.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00689/80090/83144.pdf
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Étude expérimentale des performances d’une hydrolienne, soumise aux effets de la turbulence et de l’interaction houle-courant ArchiMer
Gaurier, Benoit.
In the context of global warming, the extraction of energy by tidal turbines from marine currents must be integrated into the future energetic mix. Being confronted with a difficult marine environment, it is required to know the turbines’ behaviour when they are submitted to realistic solicitations to guarantee an optimal use. In this work, the marine turbine performance is studied when the machine is submitted to a turbulent current or a combined wave-current effect. The physical representation of trials at reduced scale is first described focusing on the incoming flow characterisation and its effects on a turbine model at 1:20 scale. The location and measurement type of the upstream velocity are discussed to accurately define its performance and its...
Tipo: Text Palavras-chave: Hydrolienne; Énergie marine renouvelable; Essais expérimentaux; PIV; LDV; Turbulence; Interaction houle-courant; Horizontal axis tidal turbine; Renewable energy; Experimental trials; PIV; LDV; Turbulence; Wave-current interaction.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00660/77197/78624.pdf
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MaRINET2 Tidal Energy Round Robin Tests—Performance Comparison of a Horizontal Axis Turbine Subjected to Combined Wave and Current Conditions ArchiMer
Gaurier, Benoit; Ordonez-sanchez, Stephanie; Facq, Jean-valery; Germain, Gregory; Johnstone, Cameron; Martinez, Rodrigo; Salvatore, Francesco; Santic, Ivan; Davey, Thomas; Old, Chris; Sellar, Brian.
This Round Robin Test program aims to establish the influence of the combined wave and current effect on the power capture and performance of a generic tidal turbine prototype. Three facilities offering similar range of experimental conditions have been selected on the basis that their dimensions along with the rotor diameter of the turbine translate into low blockage ratio conditions. The performance of the turbine shows differences between the facilities up to 25% in terms of average power coefficient, depending on the wave and current cases. To prevent the flow velocity increasing these differences, the turbine performance coefficients have been systematically normalized using a time-average disc-integrated velocity, accounting for vertical gradients...
Tipo: Text Palavras-chave: Marine energy; Wave and current interactions; Round Robin Tests; Flow measurements; Horizontal axis tidal turbine.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00635/74735/74725.pdf
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