Englberger, Antonia and Dörnbrack, Andreas (2018) A Numerically Efficient Parametrization of Turbulent Wind-Turbine Flows for Different Thermal Stratifications. Boundary-Layer Meteorology, 169, pp. 505-536. Springer. DOI: 10.1007/s10546-018-0377-z ISSN 0006-8314
![]() |
PDF
- Postprint version (accepted manuscript)
5MB |
Official URL: http://dx.doi.org/10.1007/s10546-018-0377-z
Abstract
The wake characteristics of a wind turbine in a turbulent atmospheric boundary layer under different thermal stratifications are investigated by means of large-eddy simulation with the geophysical flow solver EULAG. The turbulent inflow is based on a method that imposes the spectral energy distribution of a neutral boundary-layer precursor simulation, the turbulence-preserving method. This method is extended herein to make it applicable for different thermal stratification regimes (convective, stable, neutral) by including suitable turbulence assumptions, which are deduced from velocity fields of a diurnal-cycle precursor simulation. The wind-turbine-wake characteristics derived from simulations that include the parametrization result in good agreement with diurnal-cycle-driven wind-turbine simulations. Furthermore, different levels of accuracy are tested in the parametrization assumptions, representing the thermal stratification. These range from three-dimensional matrices of the precursor-simulation wind field to individual values. The resulting wake characteristics are similar, even for the simplest parametrization set-up, making the diurnal-cycle precursor simulation non-essential for the wind-turbine simulations. Therefore, the proposed parametrization results in a computationally fast, simple, and efficient tool for analyzing the effects of different thermal stratifications on wind-turbine wakes by means of large-eddy simulation.
Item URL in elib: | https://elib.dlr.de/121434/ | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Document Type: | Article | |||||||||
Title: | A Numerically Efficient Parametrization of Turbulent Wind-Turbine Flows for Different Thermal Stratifications | |||||||||
Authors: |
| |||||||||
Date: | 1 August 2018 | |||||||||
Journal or Publication Title: | Boundary-Layer Meteorology | |||||||||
Refereed publication: | Yes | |||||||||
Open Access: | Yes | |||||||||
Gold Open Access: | No | |||||||||
In SCOPUS: | Yes | |||||||||
In ISI Web of Science: | Yes | |||||||||
Volume: | 169 | |||||||||
DOI : | 10.1007/s10546-018-0377-z | |||||||||
Page Range: | pp. 505-536 | |||||||||
Publisher: | Springer | |||||||||
ISSN: | 0006-8314 | |||||||||
Status: | Published | |||||||||
Keywords: | Atmospheric boundary layer Diurnal cycle Large-eddy simulation Turbulence Wind-turbine wake | |||||||||
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: | 21 Aug 2018 12:07 | |||||||||
Last Modified: | 26 May 2020 23:14 |
Repository Staff Only: item control page