Investigation of the effect of side deflectors on savonius type wind turbines

In this thesis study, the effects of side deflectors on Savonius wind turbines performance were examined. The Savonius turbine used has semi-cylindrical blades (d=160mm, L=290mm) and a circular deflector in the shape of a 60 degree arc (s=104mm) is placed on a 200mm diameter circle just outside the turbine. Clockwise and counterclockwise, one side of the rotor, rotates at different angles [0, 10, 15, 20, 30, 45, 60, 75, 90, 105 ve 120] starting from 0 is positioned. where 0 is considered as the closest point to the wind direction. The results obtained show that the best steering angle towards the counterclockwise direction is approximately 0.646 λ (tip speed ratio) and 10. The power coefficient of 0.169 obtained in this position provides an increase of 55% compared to the results without a deflector. The use of the circular side deflector offers a promising approach to increase power output and overall efficiency, and this study contributes to the understanding of the aerodynamic behavior of Savonius turbines equipped with deflectors and provides valuable information for future research and development in this field.