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Wind-turbine wakes responding to stably stratified flow over complex terrain

Englberger, Antonia and Dörnbrack, Andreas (2018) Wind-turbine wakes responding to stably stratified flow over complex terrain. Journal of Physics: Conference Series, 1037, pp. 1-11. Institute of Physics (IOP) Publishing. DOI: 10.1088/1742-6596/1037/7/072014 ISSN 1742-6588

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Official URL: http://dx.doi.org/10.1088/1742-6596/1037/7/072014

Abstract

The wake characteristics of a hill-top wind turbine are investigated by means of large-eddy simulations (LESs) of stably stratified atmospheric boundary-layer (ABL) flows. All simulations are conducted with synchronized turbulent inflow data retrieved from an LES of diurnal cycle-driven boundary-layer flow over homogeneous surface. An investigation of different (weak, moderate, strong) stably stratified flow regimes passing over various 3 D hill configurations with heights up to 50 m reveals that the occurrence of flow separation not only depends on hill properties but also on the atmospheric stratification. The hill-top wake characteristics of all flow regimes are compared with wakes resulting from the same flow fields passing through the same wind turbine, however, sited on a homogeneous surface. For the same atmospheric stratification the flow over the hill impacts only the near-wake region. In contrast, the stratification impact on the hill-top wind-turbine wake is much more distinct, especially, in the far wake.

Item URL in elib:https://elib.dlr.de/121435/
Document Type:Article
Title:Wind-turbine wakes responding to stably stratified flow over complex terrain
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Englberger, AntoniaDLR, IPAUNSPECIFIED
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216
Date:2018
Journal or Publication Title:Journal of Physics: Conference Series
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:1037
DOI :10.1088/1742-6596/1037/7/072014
Page Range:pp. 1-11
Publisher:Institute of Physics (IOP) Publishing
ISSN:1742-6588
Status:Published
Keywords:large-eddy Simulation, loundary-layer, hill properties
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Ziegele, Brigitte
Deposited On:22 Aug 2018 17:43
Last Modified:22 Aug 2018 17:43

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