Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved Duct
Efforts to increase the power output of wind turbines include Diffuser Augmented Wind Turbines (DAWT) or a shroud for the rotor of a wind turbine. The selected duct has three main components: a nozzle, a diffuser, and a flange. The combined effect of these components results in enriched upstream vel...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/18/5780 |
| _version_ | 1797519514668105728 |
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| author | Mohammad Hassan Ranjbar Behnam Rafiei Seyyed Abolfazl Nasrazadani Kobra Gharali Madjid Soltani Armughan Al-Haq Jatin Nathwani |
| author_facet | Mohammad Hassan Ranjbar Behnam Rafiei Seyyed Abolfazl Nasrazadani Kobra Gharali Madjid Soltani Armughan Al-Haq Jatin Nathwani |
| author_sort | Mohammad Hassan Ranjbar |
| collection | DOAJ |
| description | Efforts to increase the power output of wind turbines include Diffuser Augmented Wind Turbines (DAWT) or a shroud for the rotor of a wind turbine. The selected duct has three main components: a nozzle, a diffuser, and a flange. The combined effect of these components results in enriched upstream velocity for the rotor installed in the throat of the duct. To obtain the maximum velocity in the throat of the duct, the optimum angles of the three parts have been analyzed. A code was developed to allow all the numerical steps including changing the geometries, generating the meshes, and setting up the numerical solver simultaneously. Finally, the optimum geometry of the duct has been established that allows a doubling of the flow velocity. The flow characteristics inside the duct have also been analyzed in detail. An H-Darrieus Vertical Axis Wind Turbine (VAWT) has been simulated inside the optimized duct. The results show that the power coefficient of the DAWT can be enhanced up to 2.9 times. Deep dynamic stall phenomena are captured perfectly. The duct advances the leading-edge vortex generation and delays the vortex separation. |
| first_indexed | 2024-03-10T07:42:54Z |
| format | Article |
| id | doaj.art-c435ad19661b45fd80488df160f2aa00 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T07:42:54Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-c435ad19661b45fd80488df160f2aa002023-11-22T12:53:14ZengMDPI AGEnergies1996-10732021-09-011418578010.3390/en14185780Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved DuctMohammad Hassan Ranjbar0Behnam Rafiei1Seyyed Abolfazl Nasrazadani2Kobra Gharali3Madjid Soltani4Armughan Al-Haq5Jatin Nathwani6School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 11155-4563, IranDepartment of Mechanical Engineering, K.N. Toosi University of Technology, Tehran 19395-19919, IranSchool of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 11155-4563, IranSchool of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 11155-4563, IranDepartment of Mechanical Engineering, K.N. Toosi University of Technology, Tehran 19395-19919, IranWaterloo Institute for Sustainable Energy (WISE), University of Waterloo, Waterloo, ON N2L 3G1, CanadaWaterloo Institute for Sustainable Energy (WISE), University of Waterloo, Waterloo, ON N2L 3G1, CanadaEfforts to increase the power output of wind turbines include Diffuser Augmented Wind Turbines (DAWT) or a shroud for the rotor of a wind turbine. The selected duct has three main components: a nozzle, a diffuser, and a flange. The combined effect of these components results in enriched upstream velocity for the rotor installed in the throat of the duct. To obtain the maximum velocity in the throat of the duct, the optimum angles of the three parts have been analyzed. A code was developed to allow all the numerical steps including changing the geometries, generating the meshes, and setting up the numerical solver simultaneously. Finally, the optimum geometry of the duct has been established that allows a doubling of the flow velocity. The flow characteristics inside the duct have also been analyzed in detail. An H-Darrieus Vertical Axis Wind Turbine (VAWT) has been simulated inside the optimized duct. The results show that the power coefficient of the DAWT can be enhanced up to 2.9 times. Deep dynamic stall phenomena are captured perfectly. The duct advances the leading-edge vortex generation and delays the vortex separation.https://www.mdpi.com/1996-1073/14/18/5780DAWTducted wind turbineH type DarrieusVAWTdynamic stallleading edge vortex |
| spellingShingle | Mohammad Hassan Ranjbar Behnam Rafiei Seyyed Abolfazl Nasrazadani Kobra Gharali Madjid Soltani Armughan Al-Haq Jatin Nathwani Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved Duct Energies DAWT ducted wind turbine H type Darrieus VAWT dynamic stall leading edge vortex |
| title | Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved Duct |
| title_full | Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved Duct |
| title_fullStr | Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved Duct |
| title_full_unstemmed | Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved Duct |
| title_short | Power Enhancement of a Vertical Axis Wind Turbine Equipped with an Improved Duct |
| title_sort | power enhancement of a vertical axis wind turbine equipped with an improved duct |
| topic | DAWT ducted wind turbine H type Darrieus VAWT dynamic stall leading edge vortex |
| url | https://www.mdpi.com/1996-1073/14/18/5780 |
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