الفهرس 
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Abstract
The present study aims to investigate the effect of five different types of stators on the performance of Savonius Bach-type rotor using 2D numerical model using the software ANSYS Fluent 18.1. The numerical model has been validated by previously published experimental results of a single stage Bach-type rotor. Three independence studies are performed in order to find the numerical model that compromises between the accuracy of results and the computational time. Seven geometrical parameters have been studied for the stator 1 - one factor at a time - to find its optimum shape achieving largest Cp, and eight geometrical parameters have been studied for the stator 5 on the same manner. Stators 2, 3 and 4 are studied with only one shape for each one. Stator 5 has the best effect on rotor performance, it produces maximum Cp=0.668 at TSR=1.2. The configuration of stator 5 parameters achieved this result is α=15°, θ1=55°, L1=4Rr, TC=0.75Rr, L2=1.5Rr, θ2=65°, X=1.1Rr and Y=0.3Rr.