Including realistic upper atmospheres in a wind-farm gravity-wave model
<p>Recent research suggests that atmospheric gravity waves can affect offshore wind-farm performance. A fast wind-farm boundary layer model has been proposed to simulate the effects of these gravity waves on wind-farm operation by <span class="cit" id="xref_text.1">&l...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-07-01
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| Series: | Wind Energy Science |
| Online Access: | https://wes.copernicus.org/articles/7/1367/2022/wes-7-1367-2022.pdf |
| _version_ | 1818114885313101824 |
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| author | K. Devesse L. Lanzilao S. Jamaer N. van Lipzig J. Meyers |
| author_facet | K. Devesse L. Lanzilao S. Jamaer N. van Lipzig J. Meyers |
| author_sort | K. Devesse |
| collection | DOAJ |
| description | <p>Recent research suggests that atmospheric gravity waves can affect offshore wind-farm performance. A fast wind-farm boundary layer model has been proposed to simulate the effects of these gravity waves on wind-farm operation by <span class="cit" id="xref_text.1"><a href="#bib1.bibx2">Allaerts and Meyers</a> (<a href="#bib1.bibx2">2019</a>)</span>. The current work extends the applicability of that model to free atmospheres in which wind and stability vary with altitude.
We validate the model using reference cases from literature on mountain waves. Analysis of a reference flow shows that internal gravity-wave resonance caused by the atmospheric non-uniformity can prohibit perturbations in the atmospheric boundary layer (ABL) at the wavelengths where it occurs. To determine the overall impact of the vertical variations in the atmospheric conditions on wind-farm operation, we consider 1 year of operation of the Belgian–Dutch wind-farm cluster with the extended model. We find that this impact on individual flow cases is often of the same order of magnitude as the total flow perturbation. In 16.6 % of the analyzed flows, the relative difference in upstream velocity reduction between uniform and non-uniform free atmospheres is more than 30 %. However, this impact is small when averaged over all cases. This suggests that variations in the atmospheric conditions should be taken into account when simulating wind-farm operation in specific atmospheric conditions.</p> |
| first_indexed | 2024-12-11T03:57:50Z |
| format | Article |
| id | doaj.art-c7d6a8e2c0d84a679e8bd6abf1df3161 |
| institution | Directory Open Access Journal |
| issn | 2366-7443 2366-7451 |
| language | English |
| last_indexed | 2024-12-11T03:57:50Z |
| publishDate | 2022-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Wind Energy Science |
| spelling | doaj.art-c7d6a8e2c0d84a679e8bd6abf1df31612022-12-22T01:21:45ZengCopernicus PublicationsWind Energy Science2366-74432366-74512022-07-0171367138210.5194/wes-7-1367-2022Including realistic upper atmospheres in a wind-farm gravity-wave modelK. Devesse0L. Lanzilao1S. Jamaer2N. van Lipzig3J. Meyers4Department of Mechanical Engineering, KU Leuven, Leuven, BelgiumDepartment of Mechanical Engineering, KU Leuven, Leuven, BelgiumDepartment of Earth and Environmental Sciences, KU Leuven, Leuven, BelgiumDepartment of Earth and Environmental Sciences, KU Leuven, Leuven, BelgiumDepartment of Mechanical Engineering, KU Leuven, Leuven, Belgium<p>Recent research suggests that atmospheric gravity waves can affect offshore wind-farm performance. A fast wind-farm boundary layer model has been proposed to simulate the effects of these gravity waves on wind-farm operation by <span class="cit" id="xref_text.1"><a href="#bib1.bibx2">Allaerts and Meyers</a> (<a href="#bib1.bibx2">2019</a>)</span>. The current work extends the applicability of that model to free atmospheres in which wind and stability vary with altitude. We validate the model using reference cases from literature on mountain waves. Analysis of a reference flow shows that internal gravity-wave resonance caused by the atmospheric non-uniformity can prohibit perturbations in the atmospheric boundary layer (ABL) at the wavelengths where it occurs. To determine the overall impact of the vertical variations in the atmospheric conditions on wind-farm operation, we consider 1 year of operation of the Belgian–Dutch wind-farm cluster with the extended model. We find that this impact on individual flow cases is often of the same order of magnitude as the total flow perturbation. In 16.6 % of the analyzed flows, the relative difference in upstream velocity reduction between uniform and non-uniform free atmospheres is more than 30 %. However, this impact is small when averaged over all cases. This suggests that variations in the atmospheric conditions should be taken into account when simulating wind-farm operation in specific atmospheric conditions.</p>https://wes.copernicus.org/articles/7/1367/2022/wes-7-1367-2022.pdf |
| spellingShingle | K. Devesse L. Lanzilao S. Jamaer N. van Lipzig J. Meyers Including realistic upper atmospheres in a wind-farm gravity-wave model Wind Energy Science |
| title | Including realistic upper atmospheres in a wind-farm gravity-wave model |
| title_full | Including realistic upper atmospheres in a wind-farm gravity-wave model |
| title_fullStr | Including realistic upper atmospheres in a wind-farm gravity-wave model |
| title_full_unstemmed | Including realistic upper atmospheres in a wind-farm gravity-wave model |
| title_short | Including realistic upper atmospheres in a wind-farm gravity-wave model |
| title_sort | including realistic upper atmospheres in a wind farm gravity wave model |
| url | https://wes.copernicus.org/articles/7/1367/2022/wes-7-1367-2022.pdf |
| work_keys_str_mv | AT kdevesse includingrealisticupperatmospheresinawindfarmgravitywavemodel AT llanzilao includingrealisticupperatmospheresinawindfarmgravitywavemodel AT sjamaer includingrealisticupperatmospheresinawindfarmgravitywavemodel AT nvanlipzig includingrealisticupperatmospheresinawindfarmgravitywavemodel AT jmeyers includingrealisticupperatmospheresinawindfarmgravitywavemodel |