Flow control actuators

Details Flow control actuators Flow control actuators

2011-07-26

2011-07-26

Ellis, Christopher P (Department: 3644)

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

C244S211000

Reexamination Certificate

active

07984879

ABSTRACT:
A flow control actuator10for a body exposed to fluid flow comprises first and second flow surfaces14, 16spaced to define an elongate gap20therebetween. An elongate control element is disposed in or adjacent the gap and has an externally facing arcuate surface and defines a first slot24between the control element and said first flow surface and a second slot between said control element and said second flow surface26. The control element22is moveable to allow the width of said slots to be adjusted generally proportionally. The flow of pressurized flow control fluid passes from a plenum chamber30out through one or both slots24, 26to be deflected around the arcuate surface under the influence of the Coanda effect. The flow control actuator10may be provided in the trailing or leading edge of an aerofoil; alternatively it may be provided between two surfaces spaced to provide said gap but otherwise providing a generally continuous surface.

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