Guided wing for aircraft flying at high angles of attack

Details Guided wing for aircraft flying at high angles of attack Guided wing for aircraft flying at high angles of attack

1995-01-19

1996-11-19

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244200, B64C 358

Patent

active

055754422

ABSTRACT:
The invention is directed to an apparatus for attaching to a wing operating in a fluid medium for increasing the angle of attack at which the wing experiences aerodynamic/hydrodynamic stall. The wing includes upper and lower surfaces extending between a leading edge and a trailing edge and having a maximum thickness therebetween, and between a root and a tip, wherein the leading and trailing edges define a chord and the root and tip define a span. The apparatus comprises at least one substantially triangular shaped plate member projecting normal to the upper surface of the wing. The at least one plate member has a straight top surface and a curvilinear bottom surface which corresponds to the contour of the upper surface of the wing. The top and bottom surfaces define the height of the at least one plate member and extend in a substantially chordwise direction between an anterior end and a posterior end of the at least one plate member. The at least one plate member has its minimum height at the anterior end and its maximum height at the posterior end wherein the maximum height corresponds to a fully attached boundary layer thickness of a fluid flowing over the upper face, the boundary layer thickness determined at the trailing edge at a predetermined operating condition.

REFERENCES:
patent: 1303544 (1919-05-01), Dorr
patent: 2074201 (1937-03-01), Bechereau
patent: 3578264 (1971-05-01), Kuethe
patent: 4699340 (1987-10-01), Rethorst
patent: 4830315 (1989-05-01), Presz, Jr. et al.
Tai, Tsze C., "Simulation and Analyis of V-22 Tiltrotor Aircraft Forward ght FlowField", American Institute of Aeronoutics and Astronautics Paper AIAA 95-0045 (Jan. 1995), pp. 1-11.

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