The k‐ϵ‐fP model applied to wind farms. (9th September 2014)

• Record Type: Journal Article
• Authors: van der Laan, M. Paul; Sørensen, Niels N.; Réthoré, Pierre‐Elouan; Mann, Jakob; Kelly, Mark C.; Troldborg, Niels; Hansen, Kurt S.; Murcia, Juan P.
• Is Part Of: Wind energy. Volume 18:Number 12(2015)
• Page Start: 2065
• Page End: 2084
• Publication Date: 2014-09-09
• Subjects: k‐ϵ eddy‐viscosity model -- wind turbine wake interaction -- actuator disk -- CFD -- RANS -- LES -- wind direction uncertainty; Wind power -- Periodicals; 621.312136
• DOI: 10.1002/we.1804
• Languages: English
• ISSNs: 1095-4244

Abstract

Abstract: The recently developed k ‐ ϵ ‐ f P eddy‐viscosity model is applied to one on‐shore and two off‐shore wind farms. The results are compared with power measurements and results of the standard k ‐ ϵ eddy‐viscosity model. In addition, the wind direction uncertainty of the measurements is used to correct the model results with a Gaussian filter. The standard k ‐ ϵ eddy‐viscosity model underpredicts the power deficit of the first downstream wind turbines, whereas the k ‐ ϵ ‐ f P eddy‐viscosity model shows a good agreement with the measurements. However, the difference in the power deficit predicted by the turbulence models becomes smaller for wind turbines that are located further downstream. Moreover, the difference between the capability of the turbulence models to estimate the wind farm efficiency reduces with increasing wind farm size and wind turbine spacing. Copyright © 2014 John Wiley & Sons, Ltd.