Abstract
This study focuses on a comparison of model results from a blade element momentum computational fluid dynamics (BEM-CFD) steady state RANS model, and a BEMT model that accounts for the wake generated from upstream turbines using analytic expressions. Rotor forces are calculated using 3D hydrofoil profile data. Both techniques are validated against existing experimental data, and then used to assess the power extraction of downstream turbines. Turbulent inflow conditions of 3% and 7% are applied, and the results of power extraction assessed. Particular attention is paid to the velocity field, with respect to the downstream wake, to assess how the turbulence characteristics effect the recovery rate and downstream power potential. Both models highlight the different recovery rates of the two turbulent conditions.