Dr Taimoor Asim t.asim@rgu.ac.uk
Associate Professor
Effect of stator blades on the startup dynamics of a vertical axis wind turbine.
Asim, Taimoor; Singh, Dharminder; Siddiqui, M. Salman; McGlinchey, Don
Authors
Dharminder Singh
M. Salman Siddiqui
Don McGlinchey
Abstract
Vertical Axis Wind Turbines (VAWTs) are omni-directional, low-cost, low-efficiency wind power extractors. A conventional drag-based VAWT consists of multiple thin rotor blades with a typical peak Tip Speed Ratio (λ) of less than 1. Their lower cut-in speed and maintenance cost make them ideal for power generation in urban environments. Numerous studies have been carried out analysing steady operation of VAWTs and quantifying their performance characteristics; however, minimal attention has been paid to their start-up dynamics. There are a few recent studies in which start-up dynamics of lift-based VAWTs have been analysed, but such studies for drag-based VAWTs are severely limited. In this study, start-up dynamics of a conventional multi-blade drag-based VAWT have been numerically investigated using a time-dependant Computational Fluid Dynamics (CFD) solver. In order to enhance the start-up characteristics of the drag-based VAWT, a stator has been integrated in the design assembly. The numerical results obtained in this study indicate that an appropriately designed stator can significantly enhance the start-up of a VAWT by directing the flow towards the rotor blades, leading to higher rotational velocity (ω) and λ. With the addition of a stator, the flow fields downstream the VAWT becomes more uniform.
Citation
ASIM, T., SINGH, D., SIDDIQUI, M.S. and MCGLINCHEY, D. 2022. Effect of stator blades on the startup dynamics of a vertical axis wind turbine. Energies [online], 15(21), 8135. Available from: https://doi.org/10.3390/en15218135
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 28, 2022 |
Online Publication Date | Oct 31, 2022 |
Publication Date | Nov 1, 2022 |
Deposit Date | Oct 28, 2022 |
Publicly Available Date | Oct 28, 2022 |
Journal | Energies |
Electronic ISSN | 1996-1073 |
Publisher | MDPI |
Peer Reviewed | Peer Reviewed |
Volume | 15 |
Issue | 21 |
Article Number | 8135 |
DOI | https://doi.org/10.3390/en15218135 |
Keywords | Vertical axis wind turbines (VAWT); Wind turbines; Computational fluid dynamics (CFD); Turbine start-up dynamics; Tip speed ratio; Start-up dynamics; Dynamic meshing |
Public URL | https://rgu-repository.worktribe.com/output/1791802 |
Files
ASIM 2022 Effect of stator blades (VOR)
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Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
Copyright Statement
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
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