The Effect of Angle Variation in the Model V Blade on the Savonius-Type Vertical Axis Wind Turbine's PerformanceWitono Hardi, Zulkifli S. Tawary and Moh.Muzni HarbelubunE3S Web Conf., 328 (2021) 09005DOI: https://doi.org/10.1051/e3sconf/202132809005