Journal ArticleDOI
Analytical modelling of wind speed deficit in large offshore wind farms
Sten Tronæs Frandsen,Rebecca Jane Barthelmie,Sara C. Pryor,Ole Rathmann,Søren Ejling Larsen,Jørgen Højstrup,Morten Lybech Thøgersen +6 more
TLDR
In this paper, the authors proposed a model for the wind speed deficit in wind farms and extended it to include both small and large wind farms extending over large areas, and the model handles a regular array geometry with straight rows of wind turbines and equidistant spacing between units in each row.Abstract:
The proposed model for the wind speed deficit in wind farms is analytical and encompasses both small wind farms and wind farms extending over large areas. As is often the need for offshore wind farms, the model handles a regular array geometry with straight rows of wind turbines and equidistant spacing between units in each row and equidistant spacing between rows. Firstly, the case with the flow direction being parallel to rows in a rectangular geometry is considered by defining three flow regimes. Secondly, when the flow is not in line with the main rows, solutions are suggested for the patterns of wind turbine units corresponding to each wind direction. The presentation is an outline of a model complex that will be adjusted and calibrated with measurements in the near future. Copyright © 2006 John Wiley & Sons, Ltd.read more
Citations
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Journal ArticleDOI
Large eddy simulation study of fully developed wind-turbine array boundary layers
TL;DR: In this paper, a suite of large eddy simulations (LES), in which wind turbines are modeled using the classical "drag disk" concept, is performed for various wind-turbine arrangements, turbine loading factors, and surface roughness values.
Journal ArticleDOI
A new analytical model for wind-turbine wakes
TL;DR: In this paper, a new analytical wake model is proposed and validated to predict the wind velocity distribution downwind of a wind turbine by applying conservation of mass and momentum and assuming a Gaussian distribution for the velocity deficit in wake.
Journal ArticleDOI
Modelling and measuring flow and wind turbine wakes in large wind farms offshore
Rebecca Jane Barthelmie,Kurt Schaldemose Hansen,Sten Tronæs Frandsen,Ole Rathmann,J.G. Schepers,W. Schlez,John D. Phillips,K. Rados,Arthouros Zervos,E.S. Politis,P. Chaviaropoulos +10 more
TL;DR: In this article, the authors compare different types of models from computational fluid dynamics (CFD) to wind farm models in terms of how accurately they represent wake losses when compared with measurements from offshore wind farms.
Journal ArticleDOI
Wind plant power optimization through yaw control using a parametric model for wake effects—a CFD simulation study
P.M.O. Gebraad,F. W. Teeuwisse,J.W. van Wingerden,Paul Fleming,Shalom D. Ruben,Jason R. Marden,Lucy Y. Pao +6 more
TL;DR: In this article, a wind plant control strategy that optimizes the yaw settings of wind turbines for improved energy production of the whole wind plant by taking into account wake effects is presented.
Journal ArticleDOI
Wind-Turbine and Wind-Farm Flows: A Review
TL;DR: This review summarizes recent experimental, computational, and theoretical research efforts that have contributed to improving the understanding and ability to predict the interactions of ABL flow with wind turbines and wind farms.
References
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Book
A First Course in Turbulence
Henk Tennekes,John L. Lumley +1 more
TL;DR: In this paper, the authors present a reference record created on 2005-11-18, modified on 2016-08-08 and used for the analysis of turbulence and transport in the context of energie.
MonographDOI
Turbulent Transport of Momentum and Heat
Henk Tennekes,John L. Lumley +1 more
TL;DR: In this article, the authors discuss the Reynolds equations and estimate of the Reynolds stress in the kinetic theory of gases, and describe the effects of shear flow near a rigid wall.
MonographDOI
The Statistical Description of Turbulence
Henk Tennekes,John L. Lumley +1 more
TL;DR: In this article, the probability density, Fourier transforms and characteristic functions, joint statistics and statistical independence, Correlation functions and spectra, the central limit theorem, and the relation functions are discussed.
Book
European wind atlas
Ib Troen,Erik Lundtang Petersen +1 more
TL;DR: The aim of the European Wind Atlas is to establish the meteorological basis for the assessment of wind energy resources as mentioned in this paper, and the main objective is to provide suitable data for evaluating the potential wind energy output from large electricity producing wind turbine installations.