Abstract
An analysis of existing experimental results shows that the observed bending oscillations of a highly swept wing cannot have been caused by the induced effects of a single leading-edge vortex, but rather by the interaction between two leading-edge vortices, one generated by a thick inner wing or wing/body glove and the other by the outboard, thin, variable-sweep wing. This inner/outer wing vortex interaction is similar to that occurring on a double-delta planform wing. The cause of the negative aerodynamic damping from the vortex interaction is the sensitivity to the angle of attack and its time derivative of the spanwise location of a leadingedge vortex.
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