| A large-eddy simulation study of wake propagation and power production in an array of tidal-current turbines. | |
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MedLine Citation:
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PMID: 23319713 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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This paper presents our initial work in performing large-eddy simulations of tidal turbine array flows. First, a horizontally periodic precursor simulation is performed to create turbulent flow data. Then those data are used as inflow into a tidal turbine array two rows deep and infinitely wide. The turbines are modelled using rotating actuator lines, and the finite-volume method is used to solve the governing equations. In studying the wakes created by the turbines, we observed that the vertical shear of the inflow combined with wake rotation causes lateral wake asymmetry. Also, various turbine configurations are simulated, and the total power production relative to isolated turbines is examined. We found that staggering consecutive rows of turbines in the simulated configurations allows the greatest efficiency using the least downstream row spacing. Counter-rotating consecutive downstream turbines in a non-staggered array shows a small benefit. This work has identified areas for improvement. For example, using a larger precursor domain would better capture elongated turbulent structures, and including salinity and temperature equations would account for density stratification and its effect on turbulence. Additionally, the wall shear stress modelling could be improved, and more array configurations could be examined. |
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Authors:
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Matthew J Churchfield; Ye Li; Patrick J Moriarty |
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Publication Detail:
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Type: Journal Article Date: 2013-01-14 |
Journal Detail:
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Title: Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Volume: 371 ISSN: 1364-503X ISO Abbreviation: Philos Trans A Math Phys Eng Sci Publication Date: 2013 Feb |
Date Detail:
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Created Date: 2013-01-15 Completed Date: 2013-02-21 Revised Date: 2013-04-24 |
Medline Journal Info:
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Nlm Unique ID: 101133385 Medline TA: Philos Trans A Math Phys Eng Sci Country: England |
Other Details:
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Languages: eng Pagination: 20120421 Citation Subset: - |
Affiliation:
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National Wind Technology Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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