Variable cycle engine

Patent · Tue Sep 16 04:00:00 EDT 1980

OSTI ID:6702697

Adamson, A P; Sprunger, E V

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 relatively small 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.

• Assignee: General Electric Co
• Patent Number(s): US 4222235
• OSTI ID: 6702697
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
330603 -- Vehicle Design Factors-- Engine System
AIRCRAFT
BLOWERS
COMBUSTORS
COMPRESSORS
DESIGN
ENERGY CONSUMPTION
ENGINES
FUEL CONSUMPTION
GAS TURBINE ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINERY
TURBINES
TURBOMACHINERY