Performance Enhancement of a Vertical Axis Wind Turbine (NACA 25112) Using Deflector Plates as an Augmenter

In order to overcome the self-starting issues in vertical axis wind turbinesWind turbine (VAWT), it is proposed to introduce the deflector plates as a power augmenter. In this study, a computational analysis on a wind turbineWind turbine rotor with three-bladed NACA NACA 2511225112 has been performed to understand the significance of power augmenters and their impact on the overall performancePerformance of the wind energyWind energy conversion system. The rotor motion of the proposed model has been simulated by introducing a sliding mesh technique with reference to the SST-turbulence model. The simulation has been performed at different flow velocities ranging from 4 to 7 m/s to understand the effects of power augmenters with respect to the enhancement in the initial torque. The observed results showed a significant improvement in the enhancement of initial torque, the aerodynamic behavior of the airfoils, and the power coefficient of the wind turbineWind turbine.