Experiments on a delta wing using leading edge blowing to remove the secondary separation

摘要

It is found that the entrainment effect of a thin jet emerging from the leadingedge of a delta wing is sufficient to remove the secondary separation. The minimumjet momentum required is small, but increases with incidence. Tests made withoutblowing, and with minimal blowing, include balance measurements, pressure plottingand tuft studies, over the range of incidence α = 0[degrees] - 20[degrees] . It is concluded that thepresence of the secondary separation does not affect the lift or the vortex heightappreciably, but is at least partly responsible for the large discrepancy betweentheory and experiment with regard to the spanwise position of the vortex.