Numerical Optimization and Performance Enhancement of Savonius Wind Turbines Using Auxiliary Blade Configurations and Gap Modifications

This study presents a comprehensive numerical investigation aimed at enhancing the aerodynamic performance of a Savonius wind turbine through innovative rotor design modifications. A validated three-dimensional computational model was employed to explore the effects of auxiliary blade configurations and gap alterations on turbine efficiency. Three distinct design strategies were examined: the addition of curved auxiliary blades, the incorporation of straight auxiliary blades with variable orientations, and the adjustment of the inter-blade gap to simulate flow-guiding effects. Each configuration was carefully optimized to redirect the airflow more effectively and increase the turbine's power output. The results demonstrate a clear improvement in performance across all modified designs, with enhanced power generation and reduced flow losses. These findings highlight the potential of targeted geometrical modifications to significantly boost the operational efficiency of vertical axis wind turbines, offering valuable insights for future design and development of renewable energy systems.