A vortex generator, or an array of vortex generators, for attenuating flow separation during flow of fluid over a surface. Vortex generators include a base with a forward end and a leading edge extending outward and rearward from the forward end to an outward end. The leading edge includes a first angular discontinuity at a height H.sub.1 above the base, and a second angular discontinuity at a height H.sub.2 above the base. The vortex generator(s) are configured for generating, adjacent a surface, at least two (2) vortices V.sub.1 and V.sub.2 in a fluid, and turning the outermost generated vortice toward the surface over which the fluid is passing.
STATEMENT OF GOVERNMENT INTEREST
 This invention was made with United States Government support under Contract No. DE-FE0000493 awarded by the United States Department of Energy. The United States Government has certain rights in the invention.