Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1978-11-13
1982-04-06
Frankfort, Charles E.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244201, B64C 2306
Patent
active
043232094
ABSTRACT:
A device for enhancing the lift capability of an aircraft wing is characterized by at least one forwardly projecting finger member mounted on the leading edge of the wing. The finger generates counter-rotating vortices, each in contact with the other, trailing backwardly across substantially the entire upper surface of the wing behind the fingers as the airflow moves upwardly and around the lateral edges of the finger. As the counter-rotating vortices trail backwardly over the upper surface of the wing, a blockage effect is created and the airflow patterns across the wing are modified to produce an increase in lift.
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Pearcey, "Shock Induced Separation and Its Prevention", Boundary Layer & Flow Control, vol. 2, 1961, pp. 1278-1279.
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