2012 Elsevier Ltd. All rights reserved.
1 : Univ Havre, CNRS, UMR 6294, Lab Ondes & Milieux Complexes, F-76058 Le Havre, France.
2 : IFREMER, Hydrodynam & Metocean Serv 150, F-62321 Boulogne Sur Mer, France.
3 : INSA, Lab Optimisat & Fiabilite Mecan Struct, EA 3828, F-76801 St Etienne, France.
Renewable Energy (0960-1481) (Pergamon-elsevier Science Ltd), 2012-10 , Vol. 46 , P. 111-126
Numerical computations, Marine current turbine, Hydrodynamic, Power and thrust coefficients, Wake
This paper presents numerical computations of three bladed horizontal axis marine current turbines in a uniform free upstream current. The unsteady evolution of the turbine wake is taken into account by some three-dimensional software, developed to assess the disturbances generated in the sea. An unsteady Lagrangian method is considered for these computations using "Vortex Method": a velocity-vorticity numerical implementation of the Navier-Stokes equations. The vortex flow is discretised with particles carrying vorticity, which are advected in a Lagrangian frame. The present paper aims at presenting results on both power and thrust coefficient (C-p and C-T) predictions and wake characterisation, up to ten diameters downstream of the turbine. Moreover, two different marine current turbines configurations are considered: one is taken from literature  and the second one is an open-modified version of turbine inspired from previous works . (C) 2012 Elsevier Ltd. All rights reserved.