Aeronautics and astronautics – Aircraft structure – Details
Patent
1993-08-05
1994-11-29
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft structure
Details
244209, B64C 2106
Patent
active
053682580
ABSTRACT:
A system for eliminating turbulence in aerodynamic surfaces, such as engine nacelles, resulting from air passing over joints and gaps in the aerodynamic surface. Basically, this system includes a suction chamber within the nacelle and extending along the inner skin wall adjacent to gaps or joints, such as around access doors, at the interface between the nose cowl and the fan cowl door, etc. Typically, a series of apertures extend through a top portion of the suction chamber below the gap to permit air to pass from the gap to the suction chamber. At least one duct communicates with the chamber and extends to a suction pump. In operation, the pump sucks air through the duct, suction chamber, apertures and gap, to prevent the formation of a transition from low drag laminar flow to high drag turbulent flow at the gap.
REFERENCES:
patent: 2925231 (1960-02-01), Pfaff et al.
patent: 3117751 (1964-01-01), Rogers et al.
patent: 3366352 (1968-01-01), Edwards et al.
patent: 4296899 (1981-10-01), Isenberg
patent: 5014934 (1991-05-01), McClaflin
patent: 5065960 (1991-11-01), Castellucci
patent: 5114103 (1992-05-01), Coffinberry
Harding Geoffrey A.
Johnson Warren A.
Barefoot Galen L.
Gilliam Frank D.
Rohr Inc.
Schlesinger Patrick J.
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