FN Archimer Export Format PT J TI Experimental study of the turbulence intensity effects on marine current turbines behaviour. Part II: Two interacting turbines BT AF MYCEK, PAUL GAURIER, Benoit GERMAIN, Gregory PINON, Gregory RIVOALEN, Elie AS 1:1,2;2:2;3:2;4:1;5:1,3; FF 1:PDG-REM-RDT-LCSM;2:PDG-REM-RDT-LCSM;3:PDG-REM-RDT-LCSM;4:;5:; C1 Univ Havre, CNRS, Lab Ondes & Milieux Complexes, UMR 6294, F-76058 Le Havre, France. IFREMER, Marine Struct Lab, F-62321 Boulogne Sur Mer, France. INSA Rouen, Lab Optimisat & Fiabilite Mecan Struct, EA 3828, F-76801 St Etienne, France. C2 UNIV LE HAVRE, FRANCE IFREMER, FRANCE INSA ROUEN, FRANCE SI BOULOGNE SE PDG-REM-RDT-LCSM IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 3.476 TC 106 UR https://archimer.ifremer.fr/doc/00175/28644/27110.pdf LA English DT Article DE ;Marine current turbine;Performance;Wake;Turbulence;Array;Tidal turbine AB The future implantation of second generation marine current turbine arrays depends on the understanding of the negative interaction effects that exist between turbines in close proximity. This is especially the case when the turbines are axially aligned one behind another in the flow. In order to highlight these interaction effects, experiments were performed in a flume tank on 3-bladed 1/30th scale prototypes of horizontal axis turbines. This work focuses on the interactions between two horizontal axis marine current turbines, axially aligned with the upstream flow. Thrust and power coefficients function of the rotation speed of the downstream device are presented. Besides, the wake of each turbine is characterised so as to explain their behaviour. A large range of inter-device distances is considered, as well as two upstream turbulence intensity conditions, namely 3% and 15%. This latter parameter deeply influences the behaviour of a marine current turbine and thus plays a preponderant role in the interactions effects between two devices. Indeed, this study points out that, for the considered turbine and blade geometry, higher ambient turbulence intensity rates (15%) reduce the wake effects, and thus allows a better compromise between inter-device spacing and individual performance. PY 2014 PD AUG SO Renewable Energy SN 0960-1481 PU Pergamon-elsevier Science Ltd VL 68 UT 000335706800092 BP 876 EP 892 DI 10.1016/j.renene.2013.12.048 ID 28644 ER EF