Effect of Stator Blades on the Startup Dynamics of a Vertical Axis Wind Turbine

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) < 1. Their lower cut-in speed and maintenance cost make them ideal for generation in urban environments. Numerous studies have been carried out analysing steady operation VAWTs quantifying their performance characteristics, however, minimal attention has paid to start-up dynamics. There few recent which dynamics lift-based analysed but such severely limited. In this study, multi-blade numerically investigated using time-dependant Computational Fluid Dynamics (CFD) solver. order enhance the characteristics VAWT, stator integrated design assembly. The numerical results obtained study indicate that an appropriately designed can significantly by directing flow towards blades, leading higher rotational velocity (ω) λ. With addition stator, fields downstream becomes more uniform.