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Article

Towards a Simplified DynamicWake Model Using POD Analysis

Institute of Physics, ForWind, University of Oldenburg, Ammerländer Herrstr. 136, 26129 Oldenburg, Germany
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Academic Editor: Frede Blaabjerg
Energies 2015, 8(2), 895-920; https://doi.org/10.3390/en8020895
Received: 21 August 2014 / Revised: 29 December 2014 / Accepted: 20 January 2015 / Published: 28 January 2015
(This article belongs to the Special Issue Wind Turbines 2014)
We apply a modified proper orthogonal decomposition (POD) to large eddy simulation data of a wind turbine wake in a turbulent atmospheric boundary layer. The turbine is modeled as an actuator disk. Our analysis mainly focuses on the pragmatic identification of spatial modes, which yields a low order description of the wake flow. This reduction to a few degrees of freedom is a crucial first step for the development of simplified dynamic wake models based on modal decompositions. It is shown that only a few modes are necessary to capture the basic dynamical aspects of quantities that are relevant to a turbine in the wake flow. Furthermore, we show that the importance of the individual modes depends on the relevant quantity chosen. Therefore, the optimal choice of modes for a possible model could in principle depend on the application of interest. We additionally present a possible interpretation of the extracted modes by relating them to the specific properties of the wake. For example, the first mode is related to the horizontal large-scale movement. View Full-Text
Keywords: wake; proper orthogonal decomposition (POD); wake model; meandering; large eddy simulations (LES); actuator disk; loads; dynamic wake; reduced order model wake; proper orthogonal decomposition (POD); wake model; meandering; large eddy simulations (LES); actuator disk; loads; dynamic wake; reduced order model
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MDPI and ACS Style

Bastine, D.; Witha, B.; Wächter, M.; Peinke, J. Towards a Simplified DynamicWake Model Using POD Analysis. Energies 2015, 8, 895-920. https://doi.org/10.3390/en8020895

AMA Style

Bastine D, Witha B, Wächter M, Peinke J. Towards a Simplified DynamicWake Model Using POD Analysis. Energies. 2015; 8(2):895-920. https://doi.org/10.3390/en8020895

Chicago/Turabian Style

Bastine, David; Witha, Björn; Wächter, Matthias; Peinke, Joachim. 2015. "Towards a Simplified DynamicWake Model Using POD Analysis" Energies 8, no. 2: 895-920. https://doi.org/10.3390/en8020895

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