The overuse of fossil fuels has led to severe environmental issues. Thus, energy recovery from renewable sources becomes mandatory to further reduce CO2 emissions and greenhouse effects. Savonius wind turbines was regarded as a renewable alternative solution to overcome these environmental issues. Hence, further works are essential to enhance their aerodynamic performance. In this context, a new modified Savonius with a previously patented blade angular offset mechanism was suggested for minimizing the resistant torque generated from the convex shape of the driven blade. A computational fluid dynamics (CFD) analysis has been conducted to check the ability of the suggested blade-offset mechanism to improve the turbine overall performance. The numerical model has been validated with test data. Numerical findings cofirmed that the suggested blade-offset mechanism has led to an improvement by up to 42.6% of the power coefficient of the Savonius turbine.