Leading edge vortex flap for wings

Details Leading edge vortex flap for wings Leading edge vortex flap for wings

1979-03-08

1981-10-06

Frankfort, Charles E.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244207, 244214, B64C 2306

Patent

active

042931100

ABSTRACT:
A series of flaps along the leading edge of a highly swept-back wing for a supersonic airplane; wherein, the spanwise series of flaps comprise a double-flap chordwise having fore and aft flap segments. When the leading edge double-flap is positioned at a forward and downward angle-of-deflection relative to the wing, the foreflap segment is further positioned at an angle-of-deflection relative to the aft-flap segment. This difference in the deflection angles, between the fore-flap segment and the aft-flap segment, creates a vortex flow region ahead of the wing leading edge; and this vortex functions to control separation of an upper surface boundary layer airflow, over the remainder of the upper surface of the wing. Also, the vortex flow will move in a spanwise direction outboard toward the tip of a swept-back wing, while remaining forward or ahead of the upper surface of the aft-flap segment. Additional embodiments relate to various means for creating a leading edge vortex flow to maintain attached flow over the remainder of the upper surface of the wing.

REFERENCES:
patent: 3090584 (1963-05-01), Kuchemann et al.
patent: 3471107 (1969-10-01), Ornberg
patent: 3480234 (1969-11-01), Cornish
patent: 3831885 (1974-08-01), Kasper

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