Validation of a three-dimensional viscous–inviscid interactive solver for wind turbine rotors |
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| Affiliation: | 1. Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada;2. Department of Structural Engineering, University of California, San Diego, La Jolla, CA 92093, USA;3. Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA 92093, USA;1. Politecnico di Milano, Dipartimento di Meccanica, Via La Masa 1, 20156, Milano, Italy |
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| Abstract: | MIRAS is a newly developed computational model that predicts the aerodynamic behavior of wind turbine blades and wakes subject to unsteady motions and viscous effects. The model is based on a three-dimensional panel method using a surface distribution of quadrilateral singularities with a Neumann no penetration condition. Viscous effects inside the boundary layer are taken into account through the coupling with the quasi-3D integral boundary layer solver Q3UIC. A free-wake model is employed to simulate the vorticity released by the blades in the wake. In this paper the new code is validated against measurements and/or CFD simulations for five wind turbine rotors, including three experimental model rotors 20–22], the 2.5 MW NM80 machine 23] and the NREL 5 MW virtual rotor 24]. Such a broad set of operational conditions and rotor sizes constitutes a very challenging validation matrix, with Reynolds numbers ranging from 5.0⋅104 to 1.2⋅107. |
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| Keywords: | Wind turbine Panel method Free wake Viscous–inviscid interaction Integral boundary layer equations |
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