Effect on Torque and Thrust of the Pointed Tip Shape of a Wind Turbine Blade
This paper presents the effect of the tip shape of a wind turbine blade on aerodynamic forces, including the effects of separation, transition and stall. A National Renewable Energy Laboratory (NREL) Phase-VI wind turbine blade was used, in which the shape of the tip was modified to a pointed tip. C...
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| Language: | English |
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MDPI AG
2017-01-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/10/1/79 |
| _version_ | 1811301843798589440 |
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| author | Kyoungsoo Lee Shrabanti Roy Ziaul Huque Raghava Kommalapati SangEul Han |
| author_facet | Kyoungsoo Lee Shrabanti Roy Ziaul Huque Raghava Kommalapati SangEul Han |
| author_sort | Kyoungsoo Lee |
| collection | DOAJ |
| description | This paper presents the effect of the tip shape of a wind turbine blade on aerodynamic forces, including the effects of separation, transition and stall. A National Renewable Energy Laboratory (NREL) Phase-VI wind turbine blade was used, in which the shape of the tip was modified to a pointed tip. Computational fluid dynamics (CFD) simulations were employed for the analysis and the results were compared with the original NREL blade CFD and experimental data using ANSYS CFX (Ansys Inc., Delaware, PA, USA). To predict the separation and separation-induced transition on both near wall and far away, the shear-stress-transport (SST) Gamma-Theta turbulent model was used. The stall onset of a 20° angle of attack and its effects were also analyzed and presented. The value of torque with the pointed tip blade was found to be 3%–8% higher than the original NREL blade showing the benefit of the pointed tip. Normal force coefficient is lower at the tip for the pointed tip blade, which results in lower deformation of the blade. It was found that the pointed-tip blade is more efficient in terms of generating torque than the original NREL Phase-VI blade in the dynamic stall region of 10–15 m/s wind speeds. |
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| format | Article |
| id | doaj.art-ed13f82d39f44b5ebe37bec28d65d04b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T07:17:21Z |
| publishDate | 2017-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-ed13f82d39f44b5ebe37bec28d65d04b2022-12-22T02:56:43ZengMDPI AGEnergies1996-10732017-01-011017910.3390/en10010079en10010079Effect on Torque and Thrust of the Pointed Tip Shape of a Wind Turbine BladeKyoungsoo Lee0Shrabanti Roy1Ziaul Huque2Raghava Kommalapati3SangEul Han4Center for Energy and Environmental Sustainability, Incohen Co., Seoul 05510, KoreaCenter for Energy and Environmental Sustainability (CEES), Department of Mechanical Engineering, Prairie View A&M University (PVAMU), Prairie View, TX 77446, USACenter for Energy and Environmental Sustainability (CEES), Department of Mechanical Engineering, Prairie View A&M University (PVAMU), Prairie View, TX 77446, USACenter for Energy and Environmental Sustainability, Department of Civil & Environmental Engineering, Prairie View A&M University (PVAMU), Prairie View, TX 77446, USASchool of Architecture, Department of Architectural Engineering, Inha University, Inchoen 402-751, KoreaThis paper presents the effect of the tip shape of a wind turbine blade on aerodynamic forces, including the effects of separation, transition and stall. A National Renewable Energy Laboratory (NREL) Phase-VI wind turbine blade was used, in which the shape of the tip was modified to a pointed tip. Computational fluid dynamics (CFD) simulations were employed for the analysis and the results were compared with the original NREL blade CFD and experimental data using ANSYS CFX (Ansys Inc., Delaware, PA, USA). To predict the separation and separation-induced transition on both near wall and far away, the shear-stress-transport (SST) Gamma-Theta turbulent model was used. The stall onset of a 20° angle of attack and its effects were also analyzed and presented. The value of torque with the pointed tip blade was found to be 3%–8% higher than the original NREL blade showing the benefit of the pointed tip. Normal force coefficient is lower at the tip for the pointed tip blade, which results in lower deformation of the blade. It was found that the pointed-tip blade is more efficient in terms of generating torque than the original NREL Phase-VI blade in the dynamic stall region of 10–15 m/s wind speeds.http://www.mdpi.com/1996-1073/10/1/79wind energywind turbine bladepointed tip bladeNational Renewable Energy Laboratory (NREL) Phase VIshear-stress-transport (SST) Gamma-Theta turbulent modelseparation and transition |
| spellingShingle | Kyoungsoo Lee Shrabanti Roy Ziaul Huque Raghava Kommalapati SangEul Han Effect on Torque and Thrust of the Pointed Tip Shape of a Wind Turbine Blade Energies wind energy wind turbine blade pointed tip blade National Renewable Energy Laboratory (NREL) Phase VI shear-stress-transport (SST) Gamma-Theta turbulent model separation and transition |
| title | Effect on Torque and Thrust of the Pointed Tip Shape of a Wind Turbine Blade |
| title_full | Effect on Torque and Thrust of the Pointed Tip Shape of a Wind Turbine Blade |
| title_fullStr | Effect on Torque and Thrust of the Pointed Tip Shape of a Wind Turbine Blade |
| title_full_unstemmed | Effect on Torque and Thrust of the Pointed Tip Shape of a Wind Turbine Blade |
| title_short | Effect on Torque and Thrust of the Pointed Tip Shape of a Wind Turbine Blade |
| title_sort | effect on torque and thrust of the pointed tip shape of a wind turbine blade |
| topic | wind energy wind turbine blade pointed tip blade National Renewable Energy Laboratory (NREL) Phase VI shear-stress-transport (SST) Gamma-Theta turbulent model separation and transition |
| url | http://www.mdpi.com/1996-1073/10/1/79 |
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