Comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapes
Abstract Curved tip extensions are among the rotor innovation concepts that can contribute to the higher performance and lower cost of horizontal axis wind turbines. One of the key drivers to exploit their advantages is the use of accurate and efficient computational aerodynamic models during the de...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Wind Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/we.2780 |
| _version_ | 1798006706180980736 |
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| author | Sergio González Horcas Néstor Ramos‐García Ang Li Georg Pirrung Thanasis Barlas |
| author_facet | Sergio González Horcas Néstor Ramos‐García Ang Li Georg Pirrung Thanasis Barlas |
| author_sort | Sergio González Horcas |
| collection | DOAJ |
| description | Abstract Curved tip extensions are among the rotor innovation concepts that can contribute to the higher performance and lower cost of horizontal axis wind turbines. One of the key drivers to exploit their advantages is the use of accurate and efficient computational aerodynamic models during the design stage. The present work gives an overview of the performance of different state‐of‐the‐art models. The following tools were employed, in descending order of complexity: (i) a blade‐resolved Navier Stokes solver, (ii) a lifting line model, (iii) a vortex‐based method coupling a near‐wake model with a far‐wake model, and (iv) two implementations of the widely used blade element momentum method (BEM), with and without radial induction. The predictions of the codes were compared when simulating the baseline geometry of a reference wind turbine and different tip extension designs with relatively large sweep angle and/or dihedral angle. Four load cases were selected for this comparison, to cover several aspects of the aerodynamic modeling: steady power curve, pitch step, extreme operating gust impact, and standstill in deep stall. The present study highlighted the limitations of the BEM‐based formulations to capture the trends attributed to the introduction of curvature at the tip. This was true even when using the radial induction submodel. The rest of the computational methods showed relatively good agreement in most of the studied load cases. An exception to this was the standstill configuration, as the blade‐resolved Navier‐Stokes solver was the only code able to capture the highly unsteady effects of deep stall. |
| first_indexed | 2024-04-11T12:59:58Z |
| format | Article |
| id | doaj.art-eb40e9bf602848a5a73c3980ec3ff31c |
| institution | Directory Open Access Journal |
| issn | 1095-4244 1099-1824 |
| language | English |
| last_indexed | 2024-04-11T12:59:58Z |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Wind Energy |
| spelling | doaj.art-eb40e9bf602848a5a73c3980ec3ff31c2022-12-22T04:22:59ZengWileyWind Energy1095-42441099-18242023-01-0126152210.1002/we.2780Comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapesSergio González Horcas0Néstor Ramos‐García1Ang Li2Georg Pirrung3Thanasis Barlas4Department of Wind Energy Technical University of Denmark (DTU) Roskilde DenmarkDepartment of Wind Energy Technical University of Denmark (DTU) Roskilde DenmarkDepartment of Wind Energy Technical University of Denmark (DTU) Roskilde DenmarkDepartment of Wind Energy Technical University of Denmark (DTU) Roskilde DenmarkDepartment of Wind Energy Technical University of Denmark (DTU) Roskilde DenmarkAbstract Curved tip extensions are among the rotor innovation concepts that can contribute to the higher performance and lower cost of horizontal axis wind turbines. One of the key drivers to exploit their advantages is the use of accurate and efficient computational aerodynamic models during the design stage. The present work gives an overview of the performance of different state‐of‐the‐art models. The following tools were employed, in descending order of complexity: (i) a blade‐resolved Navier Stokes solver, (ii) a lifting line model, (iii) a vortex‐based method coupling a near‐wake model with a far‐wake model, and (iv) two implementations of the widely used blade element momentum method (BEM), with and without radial induction. The predictions of the codes were compared when simulating the baseline geometry of a reference wind turbine and different tip extension designs with relatively large sweep angle and/or dihedral angle. Four load cases were selected for this comparison, to cover several aspects of the aerodynamic modeling: steady power curve, pitch step, extreme operating gust impact, and standstill in deep stall. The present study highlighted the limitations of the BEM‐based formulations to capture the trends attributed to the introduction of curvature at the tip. This was true even when using the radial induction submodel. The rest of the computational methods showed relatively good agreement in most of the studied load cases. An exception to this was the standstill configuration, as the blade‐resolved Navier‐Stokes solver was the only code able to capture the highly unsteady effects of deep stall.https://doi.org/10.1002/we.2780IEA 10 MW RWTComputational aerodynamicsComputational aeroelasticityComputational Fluid DynamicsBlade Element MomentumLifting Line |
| spellingShingle | Sergio González Horcas Néstor Ramos‐García Ang Li Georg Pirrung Thanasis Barlas Comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapes Wind Energy IEA 10 MW RWT Computational aerodynamics Computational aeroelasticity Computational Fluid Dynamics Blade Element Momentum Lifting Line |
| title | Comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapes |
| title_full | Comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapes |
| title_fullStr | Comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapes |
| title_full_unstemmed | Comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapes |
| title_short | Comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapes |
| title_sort | comparison of aerodynamic models for horizontal axis wind turbine blades accounting for curved tip shapes |
| topic | IEA 10 MW RWT Computational aerodynamics Computational aeroelasticity Computational Fluid Dynamics Blade Element Momentum Lifting Line |
| url | https://doi.org/10.1002/we.2780 |
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