Optimization Of Angle Deflection on Pelton Turbine Bucket Using CFD

Abstract The Pelton turbine is a type of water turbine that is often used in hydroelectric power plants. This Pelton turbine is generally used for locations with a head height of more than 30 meters. The water in the Pelton turbine moves fast, and it extracts energy from the water by slowing down the water, making it an impulse turbine. This study aimed to determine the optimal efficiency of the Pelton turbine by analyzing the blade design using variations in the deflection angle. The fluid flow velocity from the bucket with variable deflection angles of 15°, 17°, and 19° was analyzed using the Computational Fluid Dynamics (CFD) method with SolidWorks simulation software. The simulation data were then analyzed and described using the velocity triangle method. From the simulation, the largest value of turbine power is 329,54kW, and efficiency is 95.98% at an angle of 15° with a discharge of 0.35 m3/s.