FN Archimer Export Format
PT J
TI Characterization of the vertical evolution of the three-dimensional turbulence for fatigue design of tidal turbines
BT 
AF THIEBAUT, Maxime
   FILIPOT, Jean-Francois
   MAISONDIEU, Christophe
   DAMBLANS, Guillaume
   jochum, Christian
   Kilcher, Levi
   Guillou, Sylvain
AS 1:1;2:1;3:2;4:1;5:3;6:4;7:5;
FF 1:;2:;3:PDG-REM-RDT-LCSM;4:;5:;6:;7:;
C1 France Énergies Marines, Technopôle Brest-Iroise, 525 Avenue Alexis de Rochon, 29280 Plouzané, France
   IFREMER, ZI Pointe du diable, 29280 Plouzané, France
   ENSTA Bretagne, CNRS UMR 6027, IRDL, 2 rue Francois Verny, 29806 Brest, France
   National Renewable Energy Laboratory, Golden, CO, USA
   Normandie Univ, UNICAEN, LUSAC, EA4253, site universitaire de Cherbourg, rue Louis Aragon, BP 78, 50130 Cherbourg-Octeville, France
C2 FRANCE ENERGIES MARINES, FRANCE
   IFREMER, FRANCE
   ENSTA BRETAGNE, FRANCE
   NTL RENEWABLE ENERGY LAB, USA
   UNIV NORMANDIE, FRANCE
SI BREST
SE PDG-REM-RDT-LCSM
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 1.493
TC 16
UR https://archimer.ifremer.fr/doc/00642/75433/76256.pdf
   https://archimer.ifremer.fr/doc/00642/75433/76459.txt
   https://archimer.ifremer.fr/doc/00642/75433/76460.txt
LA English
DT Article
CR HYD2M
DE ;turbulence;Reynolds stresses;tidal-steam energy convertor;coupled acoustic Doppler current profilers;Alderney Race
AB A system of two coupled four-beam acoustic Doppler current profilers was used to collect turbulence measurements over a 36-h period at a highly energetic tidal energy site in Alderney Race. This system enables the evaluation of the six components of the Reynolds stress tensor throughout a large proportion of the water column. The present study provides mean vertical profiles of the velocity, the turbulence intensity and the integral lengthscale along the streamwise, spanwise and vertical direction of the tidal current. Based on our results and considering a tidal-stream energy convertor (TEC) aligned with the current main direction, the main elements of turbulence prone to affect the structure (material fatigue) and to alter power generation would likely be: (i) the streamwise turbulence intensity (Ix), (ii) the shear stress,  (iii) the normal stress, and (iv) the vertical integral lengthscale (Lz). The streamwise turbulence intensity, (Ix), was found to be higher than that estimated at other tidal energy sites across the world for similar height above bottom. Along the vertical direction, the length (Lz) of the large-scale turbulence eddies was found to be equivalent to the rotor diameter of the TEC Sabella D10. It is considered that the turbulence metrics presented in this paper will be valuable for TECs designers, helping them optimize their designs as well as improve loading prediction through the lifetime of the machines. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’. 
PY 2020
PD AUG
SO Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences
SN 1364-503X
PU Royal Society of London
VL 378
IS 2178
UT 000556600000006
DI 10.1098/rsta.2019.0495
ID 75433
ER

EF