Title: Numerical study of savonius water turbine performance by adding deflector to advancing blade side
Abstract: As one of the best renewable energy sources, hydropower becomes more predictable sourcecompared to wind energy and Savonius which its performance does not contingent to fluid flowdirection. In this present, computational Fluid Dynamics acomplished by Finite Volume Methodand unsteady RANS equation were applied to analyze the numerical simulation. The presentstudy investigated the performance of Savonius Turbine by adding deflector plate installed toadvancing blade side at 5, 10, 15, 30 and 45 of deflector angles in the direction of the fluid flow.The viscous turbulence model used realizable k-epsilon (RKE) and its descritization usedsecond order upwind. The type of mesh was made from coarse to fine meshing with 8 (eight)types of meshing and the grid independency of the numerical simulation had been validated bythe publish experimental data at TSR of 1,078. Grid independency occured at meshing G withthe error lower than 5 % compared to published experimental data. The result of this studyshows that the performance of Savonius turbine increased by adding deflector in advancingblade side with the maximum torque and power coefficient at 30 of deflector angle.