Conrad D Wagenknecht

US Patent:

41753844, Nov 27, 1979

Filed:

Aug 2, 1977

Appl. No.:

5/821119

Inventors:

Conrad D. Wagenknecht - West Chester OH
Guy K. Faust - West Chester OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

F02K 304

US Classification:

60226B

Abstract:

A double bypass, variable cycle gas turbofan engine is provided with a variable area bypass injector which varies the area through which the inner bypass stream is injected into the outer bypass stream. The bypass injector comprises an upstream variable area, double bypass selector valve, the position of which determines whether the engine will operate in the single or double bypass mode, and a downstream static pressure valve which defines an optimum flow path for injecting the inner bypass stream into the outer bypass stream. The ability to vary the area through which the inner bypass stream is injected into the outer bypass stream permits the static pressure valve to operate as an ejector and permits control of the two bypass air streams through creation of a static pressure balance at the exit of the variable area bypass injector. The ability to control the bypass operating mode and the static pressure balance at the confluence of the two bypass streams eliminates the necessity for one exhaust duct and one exhaust nozzle, thereby reducing complexity and weight, and improves the engine-aircraft integration by reducing engine and nozzle diameters.

US Patent:

44665873, Aug 21, 1984

Filed:

Dec 21, 1981

Appl. No.:

6/332893

Inventors:

Donald J. Dusa - Cincinnati OH
Conrad D. Wagenknecht - West Chester OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B64C 138
B64D 2900

US Classification:

244121

Abstract:

Nacelle installation having devices for constraining hot core exhaust gas from flowing over the trailing portion of a highly swept pylon supporting a high bypass turbofan engine. The devices can comprise a pylon ejector, a core nozzle shroud or a plurality of vortex generators and are disposed generally in the region adjacent the intersection of the core nozzle exit of the engine and the pylon shelf portion of the pylon.