Branlard, Emmanuel4; Machefaux, Ewan4; Gaunaa, Mac1; Sørensen, Hans Henrik Brandenborg3; Troldborg, Niels1
1 Department of Wind Energy, Technical University of Denmark2 Aeroelastic Design, Department of Wind Energy, Technical University of Denmark3 Department of Applied Mathematics and Computer Science, Technical University of Denmark4 Risø National Laboratory for Sustainable Energy, Technical University of Denmark
The newly implemented vortex code Omnivor coupled to the aero-servo-elastic tool hawc2 is described in this paper. Vortex wake improvements by the implementation of viscous effects are considered. Different viscous models are implemented and compared with each other. Turbulent flow fields with sheared inflow are used to compare the vortex code performance with CFD and lidar measurements. Laminar CFD computations are used to evaluate the performance of the viscous models. Consistent results between the vortex code and CFD tool are obtained up to three diameters downstream. The modelling of viscous boundaries appear more important than the modelling of viscosity in the wake. External turbulence and shear appear sufficient but their full potential flow modelling would be preferred.
Proceedings of Ewea 2014, 2014
Main Research Area:
European Wind Energy Conference & Exhibition 2014