Titre :

Turbulence characterization at tidal-stream energy site in Alderney Race

Auteur(s) :

Sentchev, Alexei [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Université du Littoral Côte d'Opale [ULCO]
Thiébaut, Maxime [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Guillou, Sylvain [Auteur]

Éditeur(s) ou directeur(s) scientifique(s) :

Guedes Soares, Carlos

Titre de l’ouvrage :

Developments in Renewable Energies OffshoreProceedings of the 4th International Conference on Renewable Energies Offshore (RENEW 2020, 12 - 15 October 2020, Lisbon, Portugal)

Éditeur :

CRC Press

Lieu de publication :

Londres

Date de publication :

2020-10-13

ISBN :

978-0367681319

Résumé en anglais : [en]

Alderney Race is a site with high tidal-stream energy potential. Current velocity measurements by two bottom-mounted ADCP are used to assess the variability of velocity and turbulence in the water column. Turbulence metrics ...
Lire la suite >Alderney Race is a site with high tidal-stream energy potential. Current velocity measurements by two bottom-mounted ADCP are used to assess the variability of velocity and turbulence in the water column. Turbulence metrics such as the dissipation rate (ε) of turbulence kinetic energy and the integral lengthscale (L) were estimated through the spectral approach and compared to the turbulence intensity (I). The mooring locations match areas with very different turbulence regime. At the northern ADCP site, characterized by higher current speed, all turbulence parameters were found larger. This enhancement is assumed to result from the current interaction with irregularities of the bathymetry and the friction effect. At the southern site, over a relatively smooth bathymetry, the temporal variability of turbulence was found depended on the velocity shear. These results highlight large spatial variability in turbulence characteristics occurring at rather short distance (4 km) within the prospective site.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL