Abstract—Flow analysis across Savonius turbine with the  addition of the circular cylinder before the flow touch  returning side of turbine is performed. This project  investigates the effect of distance (y) of the cylinder position  using CFD, where the displacement of the circular cylinder  perpendicular to the direction of the incoming flow is called  distance of y. Numerical study is carried out by using moving  mesh with 2 zones namely the stationary and rotating zone  with Reynolds number (Re) in about 1.1 x 10-5. This research  uses circular cylinder as disturbance to improve the Savonius  performance by varying y/D of 0.0, 0.25, 0.5, and 0.75. The  result reveals that a circular cylinder can increase the  performance and the best result occur at y/D of 0.75. The  performance increases in about 22.267%. 

Index Terms—savonius turbine, returning, circular cylinder,  coefficient of torque, coefficient of power 

Cite: Priyo A. Setiawan, Adi W. Husodo, Fais Hamzah, Triyogi Yuwono, and Wawan A. Widodo, "Performance Analysis of Savonius Turbine Disturbed by Cylinder in Front of Returning with Variation of Distance to Perpendicular Fluid Flow," International Journal of Mechanical Engineering and Robotics Research, Vol. 11, No. 10, pp. 761-766, October 2022. DOI: 10.18178/ijmerr.11.10.761-766

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