Aerodynamic characteristics of spanwise cambered delta wings

A wind-tunnel investigation was undertaken to determine the effect of vario us spanwise camber distributions on the aerodynamic characteristics of a 75 -deg delta wing. Data presented include force balance, seven-hole probe sur vey, as well as surface flow visualization and vortex burst trajectories. T he experimental results indicate that some of the tested dihedral and anhed ral geometric variations can augment lift significantly, requiring only min or modifications to the planar vying geometry to implement. If was found th at anhedral generally promotes lift augmentation compared to the basic wing , whereas dihedral has the opposite effect. Anhedral and dihedral have the greatest effect when applied near the wing tips, with anhedral enhancing li ft through an increase in strength of both the primary and secondary vying leading-edge vortices. Nonplanarity had a small effect on the vortex burst characteristics.