Flight Measured and Calculated Exhaust Jet Conditions for an F100 Engine in an F-15 Airplane
Hernandez, Francisco J. and Burcham Jr., Frank W. (1988) Flight Measured and Calculated Exhaust Jet Conditions for an F100 Engine in an F-15 Airplane. Technical Report NASA TM-100419, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
The exhaust jet conditions, in terms of temperature and Mach number, have been determined for a nozzle–aft end acoustic study flown on an F-15 airplane. Jet properties for the F100 EMD engines were calculated using the engine manufacturer's specification deck. The effects of atmospheric temperature on jet Mach number, M10, were calculated. Values of turbine discharge pressure, PT6M, jet Mach number, and jet temperature were calculated as a function of aircraft Mach number, altitude, and power lever angle for the test day conditions. At a typical test point with a Mach number of 0.9, intermediate power setting, and an altitude of 20,000 ft, M10 was equal to 1.63. Flight measured and calculated values of PT6M were compared for intermediate power at altitudes of 15,500, 20,500, and 31,000 ft. It was found that, at 31,000 ft, there was excellent agreement between both, but for lower altitudes the specification deck overpredicted the flight data. The calculated jet Mach numbers were believed to be accurate to within 2 percent.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | F-15 airplane, F100 engine, Jet Mach number |
| Subjects: | (01 - 09) Aeronautics: (07) Aircraft Propulsion And Power Aircraft/Project: F-15 |
| ID Code: | 435 |
| Deposited On: | 07 April 2005 |
| Additional Information: | 17 pages. |
