Influence of the streamwise surface bulges upon flow separation from the wing

In our experimental research we compared the flows over the upper surface of the usual straight wing and the wing with streamwise bulges, imitating the wing of a paraplan. We found the significant T-D structure in the zone of laminar separation bubbles, and the differences in their forms and sizes. On the whole, the obtained results show the strong dependence of flow structure on fluent streamwise bulges of the surface.