Ung, Shern-Khai and Chong, Wen-Tong and Mat, Shabudin and Ng, Jo-Han and Kok, Yin-Hui and Wong, Kok-Hoe (2022) Investigation into the aerodynamic performance of a vertical axis wind turbine with endplate design. Energies, 15 (19). ISSN 1996-1073, DOI https://doi.org/10.3390/en15196925.
Full text not available from this repository.Abstract
For the past decade, research on vertical axis wind turbines (VAWTs) has garnered immense interest due to their omnidirectional characteristic, especially the lift-type VAWT. The H-rotor Darrieus VAWT operates based on the lift generated by aerofoil blades and typically possesses higher efficiency than the drag-type Savonius VAWT. However, the open-ended blades generate tip loss effects that reduce the power output. Wingtip devices such as winglets and endplates are commonly used in aerofoil design to increase performance by reducing tip losses. In this study, a CFD simulation is conducted using the sliding mesh method and the k-omega SST turbulence model on a two-bladed NACA0018 VAWT. The aerodynamic performance of a VAWT with offset, symmetric V, asymmetric and triangular endplates are presented and compared against the baseline turbine. The simulation was first validated with the wind tunnel experimental data published in the literature. The simulation showed that the endplates reduced the swirling vortex and improved the pressure distribution along the blade span, especially at the blade tip. The relationship between TSR regimes and the tip loss effect is also reported in the paper. Increasing VAWT performance by using endplates to minimise tip loss is a simple yet effective solution. However, the improvement of the power coefficient is not remarkable as the power degradation only involves a small section of the blades.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education Malaysia under the Fundamental Research Grant Scheme (FRGS) (FRGS/1/2020/TK0/USMC/0203) |
| Uncontrolled Keywords: | Endplate; Wingtip device; Blade tip losses; Darrieus VAWT; CFD |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 22 Aug 2023 08:30 |
| Last Modified: | 22 Aug 2023 08:30 |
| URI: | http://eprints.um.edu.my/id/eprint/41075 |
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