As main conclusions, it is found that the present CFD predictions for the rotor in full scale are generally in accordance with the previous numerical data. The results are compared to experimental and numerical data of the same rotor available in the literature, especially in terms of thrust and power coefficients. Therefore, the CFD simulations are performed both for real and model scales, considering a range of tip-speed ratios, and the scale effects involved in the aerodynamics of the blades are presented and discussed. The main objective is to evaluate the changes that happen in the wind flow when the scale of the problem is reduced based on Froude-scale law, a procedure that is used for tests of floating wind turbines in wave basins, such as the ones performed as part of the OC4 program. In the present paper, a commercial CFD code based on RANS equations is used to assess the aerodynamic behavior of the rotor of NREL’s 5MW turbine.
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