Local Flow Conditions for Propulsion Experiments on the NASA F-15B Propulsion Flight Test Fixture
Vachon, Michael Jacob and Moes, Timothy R. and Corda, Stephen (2005) Local Flow Conditions for Propulsion Experiments on the NASA F-15B Propulsion Flight Test Fixture. Technical Report NASA/TM-2005-213670, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
Local flow conditions were measured underneath the National Aeronautics and Space Administration F-15B airplane to support development of future experiments on the Propulsion Flight Test Fixture (PFTF). The local Mach number and flow angles were measured using a conventional air data boom on a cone-cylinder mounted under the PFTF and compared with the airplane air data nose boom measurements. At subsonic flight speeds, the airplane and PFTF Mach numbers were approximately equal. Transonic Mach number values were up to 0.1 greater at the PFTF than the airplane, which is a counterintuitive result. The PFTF local supersonic Mach numbers were as much as 0.46 less than the airplane values. The maximum local Mach number at the PFTF was approximately 1.6 at an airplane Mach number near 2.0. The PFTF local angle of attack was negative at all Mach numbers, ranging from -3 to -8 degrees. When the airplane angle of sideslip was zero, the PFTF local value was zero between Mach 0.8 and Mach 1.1, -2 degrees between Mach 1.1 and Mach 1.5, and increased from zero to 1 degree from Mach 1.5 to Mach 2.0. Airplane inlet shock waves crossed the aerodynamic interface plane between Mach 1.85 and Mach 1.90.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Advanced propulsion systems, Air breathing engines, F-15 aircraft, Flight test fixture, Flight tests, Flow characteristics, Inlet flow, Inlet nozzles, Nozzle flow, Rocket-based combined-cycle engines, Testbed |
| Subjects: | Aircraft/Project: F-15B (01 - 09) Aeronautics: (07) Aircraft Propulsion And Power (01 - 09) Aeronautics: (05) Aircraft Design, Testing And Performance (01 - 09) Aeronautics: (02) Aerodynamics |
| ID Code: | 463 |
| Deposited On: | 05 December 2005 |
