초록 ▼

A method of applying and controlling vortex lift to a unique high-lift airfoil (29) is described wherein the planform of the airfoil (29) comprises a swept-forward outer panel (31) and a swept-aft or unswept inboard panel (33). A leading edge vortex (37) is formed on (31) and attached flow is mainta

A method of applying and controlling vortex lift to a unique high-lift airfoil (29) is described wherein the planform of the airfoil (29) comprises a swept-forward outer panel (31) and a swept-aft or unswept inboard panel (33). A leading edge vortex (37) is formed on (31) and attached flow is maintained on (33). The attached flow on (33) causes the vortex (37) of the airfoil (29) to turn downstream and also induces axial flow along axis of vortex (37). Both of these results serve to delay vortex burst. A high-lift trailing edge device (45) such as a mechanical flap as the circulation control concept will induce a high leading edge flow angularity and cause the vortex (37) to grow in strength, thereby increasing vortex lift. The vortex (37) replaces the high-weight, high-lift leading device that would otherwise be required.

대표청구항 ▼

A high-lift lifting surface for establishing and controlling vortex lift, said lifting surface comprising: (a) an outboard panel having a leading edge that is swept forward, said panel being adapted to induce edge air flow separation at angles of attack prior to stall while maintaining attached trai

A high-lift lifting surface for establishing and controlling vortex lift, said lifting surface comprising: (a) an outboard panel having a leading edge that is swept forward, said panel being adapted to induce edge air flow separation at angles of attack prior to stall while maintaining attached trailing edge flow; (b) an inboard panel adapted to maintain attached air flow; whereby the attached flow on said inboard panel creates a pressure sink for passively inducing axial air flow along the span of the outboard panel moving inboard, such axial flow serving to organize and stabilize the leading edge air flow separation into a leading edge vortex.