Performance of Savonius Wind Turbine Affected by Circular Cylinder Beside Advancing and in front of Returning Blade: Experimental MethodGusti Rusydi Furqon Syahrillah, Triyogi Yuwono and Vivien Supandhani DjanaliE3S Web Conf., 576 (2024) 04007DOI: https://doi.org/10.1051/e3sconf/202457604007