FN Archimer Export Format
PT J
TI The Impact of Turbulence and Turbine Operating Condition on the Wakes of Tidal Turbines
BT 
AF Ebdon, Tim
   Allmark, Matthew J.
   O’Doherty, Daphne M.
   Mason-Jones, Allan
   O’Doherty, Tim
   Germain, Gregory
   Gaurier, Benoit
AS 1:1;2:1;3:1;4:1;5:1;6:2;7:2;
FF 1:;2:;3:;4:;5:;6:PDG-REM-RDT-LCSM;7:PDG-REM-RDT-LCSM;
C1 Cardiff University, School of Engineering, The Parade, Cardiff, CF24 3AA, UK
   IFREMER, Marine and Structures Laboratory, Centre Manche Mer Du Nord, 150 Quai, Gambetta, 62200, Boulogne-sur-Mer, france
C2 UNIV CARDIFF, UK
   IFREMER, FRANCE
SI BOULOGNE
SE PDG-REM-RDT-LCSM
IN WOS Ifremer UPR
   copubli-europe
IF 8.634
TC 22
UR https://archimer.ifremer.fr/doc/00659/77141/78465.pdf
LA English
DT Article
DE ;Turbine wake characteristics;Turbulence;Tip speed ratio;CFD modelling;Experimental analysis
AB Before initiating a study on the interaction of multiple wakes, it is imperative that turbine wake hydrodynamics are studied in isolation. In this paper CFD computer simulations of downstream turbine wakes have been run using a scale-resolving hybrid turbulence model known as a detached eddy simulation. To allow validation of the CFD simulations the computer models were supported by flume measurements with a lab scale tidal stream turbine run at three tip-speed ratios and three turbulence conditions, varying both turbulence intensity and length-scale. From the study it was demonstrated that turbulence intensity has a significant impact on the wake development for both recovery and width. The turbulence length scales of between 0.25 and 1.0 rotor diameter did not have a significant impact on the wake. The turbine operating condition also had an impact on the resulting wakes. In the near wake, centreline velocity recovery was found to increase with increasing turbine thrust due to flow being diverted towards the turbine nacelle. For a volumetric averaged wake, greater power extraction was found to cause the greatest near-wake deficit. Wake width was found to increase with increasing tip-speed ratio (and therefore turbine thrust). 
PY 2021
PD MAR
SO Renewable Energy
SN 0960-1481
PU Elsevier BV
VL 165
IS Part 2
UT 000599709700009
BP 96
EP 116
DI 10.1016/j.renene.2020.11.065
ID 77141
ER

EF