Wind turbines are one of the key parts of solving renewable and clean energy problems. The cross-sectional shape of its blades greatly influences a wind turbine’s performance as a renewable energy source. Airfoils form the cross-section of wind turbine blades. One type of airfoil that is generally used in wind turbines is NACA 0015. This study discusses the comparison of the performance of the baseline NACA 0015 with split outlets in various outlet positions, such as 45%c, 55%c, and middle split. The research was carried out using computational fluid dynamics (CFD). The study was carried out at a constant Reynolds number of 3.6 × 105. Based on these data, it is found that the Cl of the middle split shows excellent performance compared to other variations and baseline. Further results can be seen in terms of the performance of the drag coefficient (Cd) between the various split airfoil positions and baseline; with the presence of split, Cd can further be suppressed. Based on the capability to operate at wider AoA, the middle split overcomes another variation. Based on this finding, the comparison is then conducted with gurney flap performance. From this study, it was found that the middle split improves the performance of the NACA 0015 in terms of higher AoA, thus improving efficiency in higher AoA.