“…at four phases 0 (a, b), 0.5p (c, d), p (e, f) and 1.5p (g, h) for the airfoil installed Gurney flap without plasma control (left column) and with plasma control (right column) at a = 2°, h/c = 7.0%, Re = 20,000, C l = 1.39% by drawing fluid from the opposite side of the Gurney flap across the wake, thus forming alternating vortex shedding downstream. This is similar to the Kármán vortex street from a circular cylinder (Gerrard 1966;Cantwell and Coles 1983).…”