Large-Eddy Simulation of Waked Turbines in a Scaled Wind Farm Facility

Wake Conference 2017

Wang, J.^1 ; McLean, D.^1 ; Campagnolo, F.^1 ; Yu, T.^1 ; Bottasso, C.L.^1,2

Wind Energy Institute, Technische Universitat München, Boltzmannstraße 15, Garching bei München

D-85748, Germany^1

Dipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano, Via La Masa 34, Milano

I-20156, Italy^2

关键词: Boundary layer wind tunnel;    Immersed boundary methods;    Inflow conditions;    Non-uniformities;    Tunnel characteristics;    Turbulence conditions;    Turbulence intensity;    Velocity profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/854/1/012047/pdf
DOI  :  10.1088/1742-6596/854/1/012047

来源: IOP

【 摘 要 】

The aim of this paper is to present the numerical simulation of waked scaled wind turbines operating in a boundary layer wind tunnel. The simulation uses a LES-lifting-line numerical model. An immersed boundary method in conjunction with an adequate wall model is used to represent the effects of both the wind turbine nacelle and tower, which are shown to have a considerable effect on the wake behavior. Multi-airfoil data calibrated at different Reynolds numbers are used to account for the lift and drag characteristics at the low and varying Reynolds conditions encountered in the experiments. The present study focuses on low turbulence inflow conditions and inflow non-uniformity due to wind tunnel characteristics, while higher turbulence conditions are considered in a separate study. The numerical model is validated by using experimental data obtained during test campaigns conducted with the scaled wind farm facility. The simulation and experimental results are compared in terms of power capture, rotor thrust, downstream velocity profiles and turbulence intensity.