Energy extraction from flowing water has become very prevalent in the twenty‐first century. This work aims to harness the power of flowing water to generate hydrokinetic energy. The numerous turbines were used to gather energy from flowing water and were inspired by wind turbines. One of the most common machines is the Savonius rotor. A laboratory‐scale model of a Savonius rotor was produced in this work, and the rotor's performance was tested experimentally using a flow diverting blocking plate. The flow behavior and performance of a blocking plate with complete water flow diversion from a retarding vane are examined in detail in this research. According to the data, an optimal blocking plate angle of 42.72° at a distance of 360 mm from the wall boosts power generation by 63.27%.