VORTEX DYNAMIC INVESTIGATION OF WING SLOTTED GAP OF SAAB JAS GRIPEN C-LIKE FIGHTER

Canard fighters generally configured with wing canard-deltas and would generate an airflow phenomenon producing vortex cores and lifts. The lift distribution would stall at a high angle of attack (AoA). This study investigated the vortex dynamic of wing canard delta configurations of the Saab JAS Gripen C-like model which create different wing planform than other fighters. The slotted leading edge of the Gripen would develop a strong vortex core on the outer wing, on the same direction with the spin of wing vortex; the outer core would drag the inner vortex core and strengthened. Consequently, the vortex core streamlined in a leading edge of the wing would begin to detach, resulting rolled-up vortices in the wing leading edge followed by a solid laminar stream which tends to curl out.