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| 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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| Lloyd, Catherine; Allmark, Matthew; Ordonez-sanchez, Stephanie; Martinez, Rodrigo; Johnstone, Cameron; Germain, Gregory; Gaurier, Benoit; Mason-jones, Allan; O'Doherty, Tim. |
| A comparison of a tidal turbine's performance and structural loads is conducted using lab-scale numerical models and experimental testing under multiple current-only and wave-current conditions at the IFREMER wave-current flume. Experimental testing, used to validate CFD models, was accomplished using a 0.9 m diameter, 3-bladed tidal turbine and had a blockage ratio of 8% while the turbine was submerged. Initial investigations analysed the performance and loads on the turbine under uniform and profiled current-only conditions. The presence of a profiled velocity gradient was found to have a negligible effect on the average performance characteristics; however, transient thrust, torque and out of plane bending moment loads experienced much greater... |
| Tipo: Text |
Palavras-chave: Tidal stream turbine; Wave-current interaction; Computational fluid dynamics; Regular waves; Experimental validation; Marine energy. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00678/78987/81381.pdf |
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| 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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