POD Analysis of a Wind Turbine Wake in a Turbulent Atmospheric Boundary Layer
David Bastine,Björn Witha,Matthias Wächter,Joachim Peinke +3 more
- Vol. 524, Iss: 1, pp 012153
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TLDR
In this paper, the wake of a single wind turbine is modeled using an actuator disk model and large eddy simulations, and the proper orthogonal decomposition (POD) is applied to a plane perpendicular to the main flow in the far wake of the turbine.Abstract:
The wake of a single wind turbine is modeled using an actuator disk model and large eddy simulations. As inflow condition a numerically generated turbulent atmospheric boundary layer is used. The proper orthogonal decomposition (POD) is applied to a plane perpendicular to the main flow in the far wake of the turbine. Reconstructions of the field are investigated depending on the numbers of POD modes used. Even though a great number of modes is needed to recover a great part of the turbulent kinetic energy, our results indicate that relevant aspects of a wake flow can be recovered using only a few modes. Particularly, the dynamics of the average velocity over a potential disk in the wake can partially be captured using only three modes.read more
Citations
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Big wind power: seven questions for turbulence research
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Towards a Simplified Dynamic Wake Model using POD Analysis
TL;DR: In this article, the proper orthogonal decomposition (POD) was applied to large eddy simulation data of a wind turbine wake in a turbulent atmospheric boundary layer, where the turbine is modeled as an actuator disk.
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Stochastic Wake Modelling Based on POD Analysis
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Towards a Simplified Dynamic Wake Model Using POD Analysis
TL;DR: In this article, the authors apply a modified proper orthogonal decomposition (POD) to large eddy simulation data of a wind turbine wake in a turbulent atmospheric boundary layer.
References
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The Proper Orthogonal Decomposition in the Analysis of Turbulent Flows
TL;DR: The Navier-Stokes equations are well-known to be a good model for turbulence as discussed by the authors, and the results of well over a century of increasingly sophisticated experiments are available at our disposal.
A note on wind generator interaction
TL;DR: In this article, a simple wake model for the wake behind a wind generator is given, and the model is compared to some full scale experimental results, where the production from a circular cluster of 10 wind generators is calculated.
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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
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
TL;DR: 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.
Journal ArticleDOI
Calculating the flowfield in the wake of wind turbines
TL;DR: In this article, a numerical model is described which can be used to calculate the wake flowfield of wind turbines and the effect of meteorological conditions on wake decay is examined in detail.