The camber of the wing determines how much the air accelerates around the wing. Standard wing shapes are designed to create lower pressure over the top of the wing. Supercritical airfoils are characterized by their flattened upper surface, highly cambered ('downward-curved') aft section, and larger leading-edge radius compared with NACA 6-series laminar airfoil shapes. The supersonic flow over a supercritical airfoil terminates in a weaker shock, thereby postponing shock-induced boundary layer separation.Ī supercritical airfoil is an airfoil designed primarily to delay the onset of wave drag in the transonic speed range. Illustrated are: A â supersonic flow region, B â shock wave, C â area of separated flow. Conventional (1) and supercritical (2) airfoils at identical free stream Mach number.
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