Influence of Spherical and Pyramidical Dimples and Bumps on Airfoil Performance in Subsonic Flow

In this study, surface features such as dimples and bumps are introduced to the of a NACA 0012 airfoil study their effect on boundary layer separation, particularly at high angles attack. Six modified airfoils were designed with spherical pyramidical shapes. A computational fluid dynamics (CFD) analysis was conducted these models subsonic flow using Ansys Fluent. The used Shear Stress Transport k – ω turbulence model varying angle attack (AOA) from 0 15°. velocity contours streamlines generated. Also, lift coefficient, drag coefficient lift-to-drag performance ratio computed analyzed. results showed that all modifications led delayed separation recirculation. All modification also resulted in decrease designs, except protrusions, increased (L/D) It found better than ones.