FN Archimer Export Format
PT J
TI Experimental analysis of the shear flow effect on tidal turbine blade root force from three-dimensional mean flow reconstruction
BT 
AF Gaurier, Benoit
   Druault, Ph.
   Ikhennicheu, Maria
   Germain, Gregory
AS 1:1;2:2;3:1;4:1;
FF 1:PDG-REM-RDT-LCSM;2:;3:PDG-REM-RDT-LCSM;4:PDG-REM-RDT-LCSM;
C1 Ifremer, Marine Structure Laboratory, 150 quai Gambetta, 62 200 Boulogne-sur-mer, France
   Sorbonne Université, CNRS UMR 7190, Institut Jean Le Rond d’Alembert, 75 005 Paris, France
C2 IFREMER, FRANCE
   UNIV SORBONNE, FRANCE
SI BOULOGNE
SE PDG-REM-RDT-LCSM
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
IF 1.493
TC 17
UR https://archimer.ifremer.fr/doc/00643/75535/76540.pdf
LA English
DT Article
DE ;tidal turbine;blade force;turbulent wake;experimental trials;PIV;POD
AB 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. 
PY 2020
PD AUG
SO Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences
SN 1364-503X
PU The Royal Society
VL 378
IS 2178
UT 000556600000014
DI 10.1098/rsta.2020.0001
ID 75535
ER

EF