Turbine bypass turbofan with mid-turbine reingestion and method of operating the same

Patent · Tue Mar 13 04:00:00 EST 1984

OSTI ID:6570583

Klees, G W

A supersonic two spool turbofan engine is disclosed capable not only of developing sufficient power to accelerate up to supersonic cruise and maintain efficient operation at supersonic cruise, but also arranged to cruise at subsonic velocities with a relatively low specific fuel consumption. The engine is provided with a variable bypass passageway downstream of the compressor. Flow into the bypass passageway is controlled so that during low power setting the bypass passageway is closed so that all the gaseous flow is directed through the turbine. During higher power settings, the bypass passageway is opened to the extent that a selected portion of the gaseous flow is directed through the bypass passageway to bypass the first stage of the turbine section so that the corrected flow to the first turbine stage remains substantially constant for high and low power setting of the engine. The bypass flow is then directed into the area between the first and second turbine to combine with the gaseous flow passing through the first turbine and pass through the second turbine.

• Assignee: The Boeing Company
• Patent Number(s): US 4435958
• OSTI ID: 6570583
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
AIRCRAFT
BLOWERS
COMPRESSORS
DESIGN
ENERGY CONSUMPTION
ENGINES
FLUID FLOW
FUEL CONSUMPTION
GAS FLOW
OPERATION
TURBOJET ENGINES
VELOCITY