Comparison of the spatial flow field of the iced-swept wing before and after drooping the leading edge (IMAGE)
Caption
This figure shows the comparison of the spatial distributions of the time-averaged flow field before and after drooping the leading edge in the form of u-velocity sections. With the drooping leading edge, the focus region of reverse flow over the inner wing corresponding to a large-scale recirculation degenerates into a local low-speed region near the wall, which expands outward with the sweep effect. The reverse flow induced by the combined effect of the separation bubble and the spanwise flow is eliminated at the outer wing. The influence of the leading edge separation reduces to the slight velocity defect near the wall, and a spanwise continuous low-speed region is generated. The expansion of the wake is also significantly suppressed, the behavior is characterized by slight streamwise diffusion and spanwise motion.
Credit
Chinese Journal of Aeronautics
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