An efficient blade sweep correction model for blade element momentum theory
Abstract This article proposes an efficient correction model that enables the extension of the blade element momentum method (BEM) for swept blades. Standard BEM algorithms, assuming a straight blade in the rotor plane, cannot account for the changes in the induction system introduced by blade sweep...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-12-01
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| Series: | Wind Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/we.2778 |
| _version_ | 1797988606919311360 |
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| author | Erik Kaspar Fritz Carlos Ferreira Koen Boorsma |
| author_facet | Erik Kaspar Fritz Carlos Ferreira Koen Boorsma |
| author_sort | Erik Kaspar Fritz |
| collection | DOAJ |
| description | Abstract This article proposes an efficient correction model that enables the extension of the blade element momentum method (BEM) for swept blades. Standard BEM algorithms, assuming a straight blade in the rotor plane, cannot account for the changes in the induction system introduced by blade sweep. The proposed extension corrects the axial induction regarding two aspects: the azimuthal displacement of the trailed vorticity system and the induction of the curved bound vortex on itself. The extended algorithm requires little additional processing work and maintains BEM's streamtube independent approach. The proposed correction model is applied to simulations of swept blade geometries based on the IEA 15 MW reference wind turbine. Results show good agreement with lifting line simulations that inherently can account for the swept blade geometry. Blade sweep couples bending and torsion deformations by curving the blade axis in the inplane direction. As such, it can be used to passively alleviate loads and, thus, aeroelastically tailor wind turbine blades. The implementation of aeroelastic tailoring techniques, and the aeroelastic analysis in general, becomes increasingly significant with the size of wind turbine rotors continually rising. Due to its low computing complexity, BEM remains a crucial tool in the aerodynamic and aeroelastic analysis of wind turbine rotors. Thus, the proposed correction model contributes to a fast and accurate evaluation of swept blade designs. |
| first_indexed | 2024-04-11T08:05:55Z |
| format | Article |
| id | doaj.art-678f9754c11048649122b7039cebb015 |
| institution | Directory Open Access Journal |
| issn | 1095-4244 1099-1824 |
| language | English |
| last_indexed | 2024-04-11T08:05:55Z |
| publishDate | 2022-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Wind Energy |
| spelling | doaj.art-678f9754c11048649122b7039cebb0152022-12-22T04:35:32ZengWileyWind Energy1095-42441099-18242022-12-0125121977199410.1002/we.2778An efficient blade sweep correction model for blade element momentum theoryErik Kaspar Fritz0Carlos Ferreira1Koen Boorsma2Wind Energy TNO Energy Transition Petten NetherlandsFaculty of Aerospace Engineering Technical University of Delft Delft NetherlandsWind Energy TNO Energy Transition Petten NetherlandsAbstract This article proposes an efficient correction model that enables the extension of the blade element momentum method (BEM) for swept blades. Standard BEM algorithms, assuming a straight blade in the rotor plane, cannot account for the changes in the induction system introduced by blade sweep. The proposed extension corrects the axial induction regarding two aspects: the azimuthal displacement of the trailed vorticity system and the induction of the curved bound vortex on itself. The extended algorithm requires little additional processing work and maintains BEM's streamtube independent approach. The proposed correction model is applied to simulations of swept blade geometries based on the IEA 15 MW reference wind turbine. Results show good agreement with lifting line simulations that inherently can account for the swept blade geometry. Blade sweep couples bending and torsion deformations by curving the blade axis in the inplane direction. As such, it can be used to passively alleviate loads and, thus, aeroelastically tailor wind turbine blades. The implementation of aeroelastic tailoring techniques, and the aeroelastic analysis in general, becomes increasingly significant with the size of wind turbine rotors continually rising. Due to its low computing complexity, BEM remains a crucial tool in the aerodynamic and aeroelastic analysis of wind turbine rotors. Thus, the proposed correction model contributes to a fast and accurate evaluation of swept blade designs.https://doi.org/10.1002/we.2778blade element momentum theoryblade sweepengineering modelwind turbine aerodynamics |
| spellingShingle | Erik Kaspar Fritz Carlos Ferreira Koen Boorsma An efficient blade sweep correction model for blade element momentum theory Wind Energy blade element momentum theory blade sweep engineering model wind turbine aerodynamics |
| title | An efficient blade sweep correction model for blade element momentum theory |
| title_full | An efficient blade sweep correction model for blade element momentum theory |
| title_fullStr | An efficient blade sweep correction model for blade element momentum theory |
| title_full_unstemmed | An efficient blade sweep correction model for blade element momentum theory |
| title_short | An efficient blade sweep correction model for blade element momentum theory |
| title_sort | efficient blade sweep correction model for blade element momentum theory |
| topic | blade element momentum theory blade sweep engineering model wind turbine aerodynamics |
| url | https://doi.org/10.1002/we.2778 |
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