This study aims to observe whether the overall yield has changed utilizing the different blade structures and the end plates placed on the different blade structures of the Savonius-type wind turbine. End plates of different diameters are placed at the top and bottom of the turbine to increase overall efficiency.While the experimental analysis was conducted in the aerodynamic laboratory of the faculty of Aeronautical and Astronauticalat Erciyes University, Ansys Fluent software is used for numerical calculations.The turbine structure used for the numerical study is made according to the optimum values taken from the experimental investigationto minimize the time wasted. The results in the experimental and numerical analysis were compared with each other and the overall yield was observed to increase according to these analysis results. The presence of the end plate significantly increased the efficiency of the savonius turbine and allowed it to operate in the higher TSR range.This increase is directly proportional to the enlarging in the diameter of the end plate

In this study, Savonius-type wind turbine rotors with the same front view area were produced with 3D printers by changing their aspect ratios, and then both experimental and numerical analyzes were carried out according to them attaching end plate and without end plate situations. The wind tunnel in the university was used in the experimental analysis. For numerical analysis, rotors and wind tunnels modeled in CAD program were analyzed in Ansys Fluent program. The analyzes made are for imaging purposes only, and the results in the experimental analyzes are accepted as correct. The reduction of aspect ratios in the uncapped analyzes decreased the overall efficiency, but the opposite effect was observed when the analyzes were repeated with the end plate. In addition, while negative pressure was observed in the rotors made without cover (bare case) in the digital images, this situation was not seen in the analyzes made with the end plate.