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Title: A simulation study demonstrating the importance of large-scale trailing vortices in wake steering

Abstract

In this article, we investigate the role of flow structures generated in wind farm control through yaw misalignment. A pair of counter-rotating vortices are shown to be important in deforming the shape of the wake and in explaining the asymmetry of wake steering in oppositely signed yaw angles. We motivate the development of new physics for control-oriented engineering models of wind farm control, which include the effects of these large-scale flow structures. Such a new model would improve the predictability of control-oriented models. Results presented in this paper indicate that wind farm control strategies, based on new control-oriented models with new physics, that target total flow control over wake redirection may be different, and perhaps more effective, than current approaches. We propose that wind farm control and wake steering should be thought of as the generation of large-scale flow structures, which will aid in the improved performance of wind farms.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
OSTI Identifier:
1416256
Report Number(s):
NREL/JA-5000-70521
Journal ID: ISSN 2366-7621
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Wind Energy Science Discussions
Additional Journal Information:
Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2366-7621
Publisher:
European Academy of Wind Energy - Copernicus
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; wind farm control; wake steering; yaw misalignment; wind energy

Citation Formats

Fleming, Paul, Annoni, Jennifer, Churchfield, Matthew, Martinez-Tossas, Luis A., Gruchalla, Kenny, Lawson, Michael, and Moriarty, Patrick. A simulation study demonstrating the importance of large-scale trailing vortices in wake steering. United States: N. p., 2018. Web. doi:10.5194/wes-2017-52.
Fleming, Paul, Annoni, Jennifer, Churchfield, Matthew, Martinez-Tossas, Luis A., Gruchalla, Kenny, Lawson, Michael, & Moriarty, Patrick. A simulation study demonstrating the importance of large-scale trailing vortices in wake steering. United States. doi:10.5194/wes-2017-52.
Fleming, Paul, Annoni, Jennifer, Churchfield, Matthew, Martinez-Tossas, Luis A., Gruchalla, Kenny, Lawson, Michael, and Moriarty, Patrick. Mon . "A simulation study demonstrating the importance of large-scale trailing vortices in wake steering". United States. doi:10.5194/wes-2017-52. https://www.osti.gov/servlets/purl/1416256.
@article{osti_1416256,
title = {A simulation study demonstrating the importance of large-scale trailing vortices in wake steering},
author = {Fleming, Paul and Annoni, Jennifer and Churchfield, Matthew and Martinez-Tossas, Luis A. and Gruchalla, Kenny and Lawson, Michael and Moriarty, Patrick},
abstractNote = {In this article, we investigate the role of flow structures generated in wind farm control through yaw misalignment. A pair of counter-rotating vortices are shown to be important in deforming the shape of the wake and in explaining the asymmetry of wake steering in oppositely signed yaw angles. We motivate the development of new physics for control-oriented engineering models of wind farm control, which include the effects of these large-scale flow structures. Such a new model would improve the predictability of control-oriented models. Results presented in this paper indicate that wind farm control strategies, based on new control-oriented models with new physics, that target total flow control over wake redirection may be different, and perhaps more effective, than current approaches. We propose that wind farm control and wake steering should be thought of as the generation of large-scale flow structures, which will aid in the improved performance of wind farms.},
doi = {10.5194/wes-2017-52},
journal = {Wind Energy Science Discussions},
number = 1,
volume = 3,
place = {United States},
year = {Mon May 14 00:00:00 EDT 2018},
month = {Mon May 14 00:00:00 EDT 2018}
}

Journal Article:
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