Study the effect of curved edges on the aerodynamics performance of suction slot

The possibility of decreasing the drag coefficient slotted airfoil is investigated at Reynold number 1.6 x106 for angles attack were ranged from 0°to 20°. For this purpose, edges simple slot had been made with curve edges. numerical study was evaluated by using ANSYS fluent 21.0 κ-ω SST turbulence to solve fully turbulent Navier-stocks equations. location and dimensions adopted previous consideration where fixed exit 60% chord, orientation 65° 1%chord width slot. rounded make flow streamed surface. results showed that method has decreased entire range increasing in lift angels ≥14° delaying stall angle 15° 19°. maximum ratio 3.9 times solid 17°.