Flight Evaluation of an Extended Engine Life Mode on an F-15 Airplane
Myers, Lawrence P. and Conners, Timothy R. (1992) Flight Evaluation of an Extended Engine Life Mode on an F-15 Airplane. Technical Report NASA TM-104240, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
An integrated flight and propulsion control system designed to reduce the rate of engine deterioration has been developed and evaluated in flight on the NASA Dryden F-15 research aircraft. The extended engine life mode increases engine pressure ratio while reducing engine airflow to lower the turbine temperature at constant thrust. The engine pressure ratio uptrim is modulated in real time based on airplane maneuver requirements, flight conditions, and engine information. The extended engine life mode logic performed well, significantly reducing turbine operating temperature. Reductions in fan turbine inlet temperature of up to 80 ºF were obtained at intermediate power and up to 170 ºF at maximum augmented power with no appreciable loss in thrust. A secondary benefit was the considerable reduction in thrust-specific fuel consumption. The success of the extended engine life mode is one example of the advantages gained from integrating aircraft flight and propulsion control systems.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Extended engine life, Integrated controls, Reduced operating temperature at constant thrust |
| Subjects: | Aircraft/Project: F-15 HIDEC (01 - 09) Aeronautics: (07) Aircraft Propulsion And Power Aircraft/Project: F-15 PSC |
| ID Code: | 275 |
| Deposited On: | 26 July 2004 |
| Additional Information: | 29 pages. |
