Computational Fluid Dynamics Method for Predicting Savonius Water Turbine Performance with Fin-Blade

Hydropower is Indonesia's second most significant renewable energy source, following solar energy.It possesses a substantial capacity of 75,000MW, constituting around 17.8% of the overall renewable energy portfolio in the country.However, hydropower installations in Indonesia account for only 0.061% of the available potential, leaving a considerable gap.One effort to bridge the gap is the development of a water turbine.Because Savonius has been a popular turbine in recent years, this research was conducted using one.Because of the Savonius's simple structure, it is simple to modify.This study aims to determine how the number and size of fins affect the performance of the Savonius water turbine.Computational Fluid Dynamics with two-dimensional analysis was used in this study.The Fluent Solver and the Ansys Student version software were used in this study.The variations included no fins, one fin, and two fins on the rotor.The k-shear Stress Transport (SST), which produces accurate findings by combining the k-model for free flow and the standard k-model for boundary (wall) flow.Inlet velocities of 0.3m/s, 0.65m/s, and 0.9m/s were utilized for the research simulations.At a flow velocity of 0.65m/s and a TSR of 0.77, the power coefficient is increased by 13.8% by adding two fins compared to the configuration without fins.The findings were subsequently subjected to a two-factor factorial design analysis.The findings indicate that the number of fins and the TSR factor exert a substantial impact.However, two factors have no influence on each other.