“…To restrict the flow along the spanwise direction, even at the blade tip where the tip vortices were formed, Wheeler invented a series of "wishbone"-shaped vortex generators [17] , which consist of two triangular walls at certain angles, and "horseshoe" vortices within the boundary layer. Wedge-shaped vortex generators are by construction more robust so that they can be used for a wide range of applications in the high-speed sector [18] . The most frequently used shapes of vortex generators in the industry are rectangular and triangular.…”