Variable cycle engine

Details Variable cycle engine Variable cycle engine

1977-07-25

1980-09-16

Garrett, Robert E.

Power plants

Reaction motor

Interrelated reaction motors

60262, F02K 306

Patent

active

042222354

ABSTRACT:
A variable cycle turboshaft engine includes a remote fan system and respective high and low pressure systems for selectively driving the fan system in such a manner as to provide VTOL takeoff capability and minimum specific fuel consumption (SFC) at cruise and loiter conditions. For takeoff the fan system is primarily driven by the relatively large low pressure system whose combustor receives the motive fluid from a core bypass duct and, for cruise and loiter conditions, the fan system is driven by both a relativelysmall high pressure core and the low pressure system with its combustor inoperative. A mixer is disposed downstream of the high pressure system for mixing the relatively cold air from the bypass duct and the relatively hot air from the core prior to its flow to the low pressure turbine.

REFERENCES:
patent: 2409177 (1946-10-01), Allen et al.
patent: 2465099 (1949-03-01), Johnson
patent: 2619795 (1952-12-01), Drake
patent: 3016698 (1962-01-01), Sobey
patent: 3368352 (1968-02-01), Hewson
patent: 3632224 (1972-01-01), Wright et al.
patent: 3677012 (1972-07-01), Batscha
patent: 3938328 (1976-02-01), Klees
patent: 4025221 (1977-05-01), Kronogard

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