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CFD modelling approaches against single wind turbine wake measurements using RANS

Tijdschriftbijdrage - Tijdschriftartikel

Numerical simulations of two wind turbine generators including the exact geometry of their blades and hub are compared against a simplified actuator disk model (ADM). The wake expansion of the upstream rotor is investigated and compared with measurements. Computational Fluid Dynamics (CFD) simulations have been performed using the open-source platform OpenFOAM. The multiple reference frame (MRF) approach was used to model the inner rotating reference frames in a stationary computational mesh and outer reference frame for the full wind turbine rotor simulations. The standard k — ε and k — ω turbulence closure schemes have been used to solve the steady state, three dimensional Reynolds Averaged Navier- Stokes (RANS) equations. Results of near and far wake regions are compared with wind tunnel measurements along three horizontal lines downstream. The ADM under-predicted the velocity deficit at the wake for both turbulence models. Full wind turbine rotor simulations showed good agreement against the experimental data at the near wake, amplifying the differences between the simplified models.
Tijdschrift: Journal of Physics: Conference Series
ISSN: 1742-6588
Volume: 753
Jaar van publicatie:2016
Trefwoorden:CFD, Wind Energy, Wind turbine, Blade resolved simulation, RANS, Turbulence modelling, Wake effects, OpenFOAM, wind tunnel validation
Auteurs:International
Toegankelijkheid:Open