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Turbulence-resolving simulations of wind turbine wakes

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Title: Turbulence-resolving simulations of wind turbine wakes
Authors: Deskos, G
Laizet, S
Piggott, M
Item Type: Journal Article
Abstract: Turbulence-resolving simulations of wind turbine wakes are presented using a high-order flow solver combined with both a standard and a novel dynamic implicit spectral vanishing viscosity (iSVV and dynamic iSVV) model to account for subgrid-scale (SGS) stresses. The numerical solutions are compared against wind tunnel measurements, which include mean velocity and turbulent intensity profiles, as well as integral rotor quantities such as power and thrust coefficients. For the standard (also termed static) case the magnitude of the spectral vanishing viscosity is selected via a heuristic analysis of the wake statistics, while in the case of the dynamic model the magnitude is adjusted both in space and time at each time step. The study focuses on examining the ability of the two approaches, standard (static) and dynamic, to accurately capture the wake features, both qualitatively and quantitatively. The results suggest that the static method can become over-dissipative when the magnitude of the spectral viscosity is increased, while the dynamic approach which adjusts the magnitude of dissipation locally is shown to be more appropriate for a non-homogeneous flow such that of a wind turbine wake.
Issue Date: 1-Apr-2019
Date of Acceptance: 22-Nov-2018
URI: http://hdl.handle.net/10044/1/66494
DOI: https://dx.doi.org/10.1016/j.renene.2018.11.084
ISSN: 1879-0682
Publisher: Elsevier
Start Page: 989
End Page: 1002
Journal / Book Title: Renewable Energy
Volume: 134
Copyright Statement: © 2018 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Energy Futures Lab
Funder's Grant Number: EP/R007470/1
Keywords: physics.flu-dyn
0906 Electrical And Electronic Engineering
0913 Mechanical Engineering
Publication Status: Published
Online Publication Date: 2018-11-28
Appears in Collections:Earth Science and Engineering
Centre for Environmental Policy
Faculty of Natural Sciences
Faculty of Engineering