New Pair of Leading-Edge Vortex Structure for Flow over Delta Wing.

Visualization experiments show that a new flow structure of two pairs of leading-edge vortices exists on the upper surface of the 75-deg sweptback delta wings with leeward and symmetrical beveled leading edges. The wind-tunnel force measurement results indicate this new structure contributes much to the aerodynamic performance of the wing. Some discussion about this new observation is presented in this paper. [ABSTRACT FROM AUTHOR]