This work focuses on the numerical evaluation of aerodynamic damping for a wind turbine rotor. A finite beam element code is used to describe the structure. Two types of aerodynamic models are compared. Firstly, two engineering semi-empirical dynamic stall models implemented in the structural code for modelling the aerodynamic forces are applied. Secondly, a Navier-Stokes flow solver has been coupled to the structural model. Test cases involving a two-bladed wind turbine rotor are computed. The aerodynamic damping is determined for the two first eigenmodes of the structure. A comparison study of the results highlights the discrepancies between the different models.
Computation of Modal Aerodynamic Damping Using CFD
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Bertagnolio, F, Gaunaa, M, So̸rensen, NN, Hansen, M, & Rasmussen, F. "Computation of Modal Aerodynamic Damping Using CFD." Proceedings of the ASME 2003 Wind Energy Symposium. ASME 2003 Wind Energy Symposium. Reno, Nevada, USA. January 6–9, 2003. pp. 115-125. ASME. https://doi.org/10.1115/WIND2003-521
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