Airfoil trailing edge

Details Airfoil trailing edge Airfoil trailing edge

1986-12-29

1989-03-21

Barefoot, Galen

Aeronautics and astronautics

Aircraft structure

Details

244 35R, 416235, 416236R, B64C 1118

Patent

active

048136336

ABSTRACT:
An airfoil has a plurality of spaced apart, U-shaped troughs in either or both its suction or pressure surface in the trailing edge region. Each trough extends in a direction generally parallel to the bulk fluid flow in its vicinity near the airfoil surface and has an outlet at the trailing edge. The troughs increase in depth from their inlets toward their outlets, the maximum depth being no more than half the trailing edge thickness. The troughs are spaced apart, sized and configured to flow full over their entire length and to cause fluid to flow into the space immediately behind the trailing edge, thereby reducing base drag.

REFERENCES:
patent: 1366635 (1921-01-01), Conway
patent: 2800291 (1957-07-01), Stephens
patent: 3481531 (1969-12-01), MacArthur et al.
patent: 4318669 (1982-03-01), Wennerstrom

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