Exhaust nozzle control and core engine fuel control for turbofan engine

Patent · Tue Oct 13 00:00:00 EDT 1981

OSTI ID:5774044

Camp, V T

This control serves to optimize thrust during steady state and transient operation modes of a turbofan engine of the mixed flow type by adjusting or trimming the exhaust nozzle area as a function of fan pressure ratio and fan rotor speed and by adjusting or trimming the core engine fuel flow as a function of fan rotor speed and/or turbine inlet temperature. The control serves to enhance stability by assuring airflow in the engine and its inlet is within a given value avoiding inlet buzz and high distortion to the engine and avoiding even transient operation in conditions that might cause compressor flow instability or stall. Fuel flow is adjusted or trimmed as a function of fan rotor speed or turbine inlet temperature limits depending on which is calling for the least amount of fuel.

• Assignee: United Technologies Corp
• Patent Number(s): US 4294069
• OSTI ID: 5774044
• Resource Relation: Patent File Date: Filed date 26 Apr 1978; Other Information: PAT-APPL-900384
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
FUEL SYSTEMS
CONTROL SYSTEMS
TURBOJET ENGINES
PERFORMANCE
BLOWERS
DESIGN
EXHAUST SYSTEMS
FLUID FLOW
FUEL CONSUMPTION
GAS TURBINE ENGINES
NOZZLES
ROTORS
ENERGY CONSUMPTION
ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
330103* - Internal Combustion Engines- Turbine