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Englberger, Antonia and Dörnbrack, Andreas (2017) Impact of Neutral Boundary-Layer Turbulence on Wind-Turbine Wakes: A Numerical Modelling Study. Boundary-Layer Meteorology, 162 (3), pp. 427-449. Springer. doi: 10.1007/s10546-016-0208-z. ISSN 0006-8314.
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Official URL: http://dx.doi.org/10.1007/s10546-016-0208-z
Abstract
The wake characteristics of a wind turbine in a turbulent boundary layer under neutral stratification are investigated systematically by means of large-eddy simulations. A methodology to maintain the turbulence of the background flow for simulations with open horizontal boundaries, without the necessity of the permanent import of turbulence data from a precursor simulation, was implemented in the geophysical flow solver EULAG. These requirements are fulfilled by applying the spectral energy distribution of a neutral boundary layer in the wind-turbine simulations. A detailed analysis of the wake response towards different turbulence levels of the background flow results in a more rapid recovery of the wake for a higher level of turbulence.Amodified version of the Rankine–Froude actuator disc model and the blade element momentum method are tested as wind-turbine parametrizations resulting in a strong dependence of the near-wake wind field on the parametrization, whereas the far-wake flow is fairly insensitive to it. The wake characteristics are influenced by the two considered airfoils in the blade element momentum method up to a streamwise distance of 14D (D=rotor diameter). In addition, the swirl induced by the rotation has an impact on the velocity field of the wind turbine even in the far wake. Further, a wake response study reveals a considerable effect of different subgrid-scale closure models on the streamwise turbulent intensity.
| Item URL in elib: | https://elib.dlr.de/107193/ | |||||||||
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| Document Type: | Article | |||||||||
| Title: | Impact of Neutral Boundary-Layer Turbulence on Wind-Turbine Wakes: A Numerical Modelling Study | |||||||||
| Authors: |
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| Date: | 2017 | |||||||||
| 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: | 162 | |||||||||
| DOI: | 10.1007/s10546-016-0208-z | |||||||||
| Page Range: | pp. 427-449 | |||||||||
| Publisher: | Springer | |||||||||
| ISSN: | 0006-8314 | |||||||||
| Status: | Published | |||||||||
| Keywords: | Atmospheric boundary layer · Large-eddy simulation · Turbulence ·Wind-turbine wake | |||||||||
| HGF - Research field: | Energy | |||||||||
| HGF - Program: | Renewable Energies | |||||||||
| HGF - Program Themes: | other | |||||||||
| DLR - Research area: | Energy | |||||||||
| DLR - Program: | E SF - Solar research | |||||||||
| DLR - Research theme (Project): | E - Wind Energy (old) | |||||||||
| Location: | Oberpfaffenhofen | |||||||||
| Institutes and Institutions: | Institute of Atmospheric Physics > Transport Meteorology | |||||||||
| Deposited By: | Ziegele, Brigitte | |||||||||
| Deposited On: | 31 Oct 2016 07:47 | |||||||||
| Last Modified: | 06 Sep 2019 15:19 |
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