Skip to main content

Research Repository

Advanced Search

Effect of stator blades on the startup dynamics of a vertical axis wind turbine.

Asim, Taimoor; Singh, Dharminder; Siddiqui, M. Salman; McGlinchey, Don


Dharminder Singh

M. Salman Siddiqui

Don McGlinchey


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.


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:

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
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


You might also like

Downloadable Citations