Numerical investigation of simultaneous suction and blowing jets with same conditions on aerodynamic characteristics of NACA0012 airfoil

In this paper, the numerical simulation of suction and blowing on airfoil NACA0012 are performed. In the past, the effect of suction and blowing jets on the airfoil has been explored separately. The result of this study showed that the occurrence of suction at a distance of 10% in length of the chord from the entrance edge would be increased the lift factor. The result of this study showed that occurrence of suction at a distance 10% of its length and length in the distance 10% of the chord from entrance edge causes to maximum increasing to lift coefficient. In this study the suction and blowing zone lengths were same and 2.5% longer in length as well as the suction and blowing range of 0.3 , 0.2 , 0.1 , 0.5 and were examined. The flow of an incompressible airfoil, the Reynolds number of 500000 and also desired fluid is air. SST turbulence model has been used for this numerical study and for flow near wall a scalable wall function has been used. Due to the suction and blowing simulation results in the areas mentioned it increases lift factor by 1.2 in the suction range 0.5. Also the angle of attack on which stall occurs is significantly increased and reaches a range of 0.5 to 26 degrees.