Simultaneous Effect of Suction and Cavity for Controlling Flow Separation on NACA 0012 Airfoil – CFD Approach

Authors : Esmaeel FATAHİAN, Hossein FATAHIAN

Pages : 235-249

Doi:10.35378/gujs.706052

View : 25 | Download : 6

Publication Date : 2021-03-01

Article Type : Research Paper

Abstract :In the present research, a Computational Fluid Dynamics insert ignore into journalissuearticles values(CFD); investigation is carried out for analyzing the simultaneous effect of suction and cavity for controlling flow separation on NACA 0012 airfoil. Hence, a perpendicular suction jet insert ignore into journalissuearticles values(jet = -90°); is employed with Rjet equal to 0.15 at Ljet = 0.1c. Simultaneously, a cavity is used at 90% of chord length insert ignore into journalissuearticles values(0.9c); with 20 mm width and 10 mm depth. The fluid flow is assumed to be 2D turbulent, and incompressible. The results demonstrate that lift coefficient has raised by 30% and drag coefficient has decreased by 40% at α = 14° by using simultaneous suction and cavity. The flow control method improves lift to drag ratio and stall angle has increased from 14° to 22°. Consequently, the flow separation has been delayed, the recirculation zone has gone downstream and completely eliminated by utilizing simultaneous suction and cavity as an effective flow control method.
Keywords : Airfoil, Suction, Flow separation, Cavity, Lift coefficient, Drag coefficient