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A thorough understanding of the principles of aerodynamics and structural dynamics of the rotor system is required for designing a wind turbine system that can generate power with high efficiency. The power generated by a Vertical Axis Wind Turbine (VAWT) depends on the drag force generated by the individual blades and interactions between them in a rotating configuration. The present analysis is an attempt to predict numerically the coefficient of drag and other aerodynamic parameters for a three and four blades Vane type Vertical Axis Wind Turbine (VVAWT) with different blades and vanes position. Commercial Computational Fluid Dynamics CFD softwares GAMBIT and FLUENT are used in the numerical analysis where the Shear Stress Transport (SST) k-ω turbulence closure model is used. The results are found to be similar in nature to those reported for VAWT having different blade designs.

CFD analysis of three and four blades movable vanes type vertical axis wind turbine having movable vanes