NASA research activities in aeropropulsion [PDF]
NASA is responsible for advancing technologies related to air transportation. A sampling of the work at NASA's Lewis Research Center aimed at improved aircraft propulsion systems is described.
Mccarthy, J. F., Jr., Weber, R. J.
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Development and verification of real-time, hybrid computer simulation of F100-PW-100(3) turbofan engine [PDF]
A real time, hybrid computer simulation of a turbofan engine is described. Controls research programs involving that engine are supported by the simulation.
Cwynar, D. S., Seldner, K., Szuch, J. R.
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Advanced detection, isolation, and accommodation of sensor failures in turbofan engines: Real-time microcomputer implementation [PDF]
The objective of the Advanced Detection, Isolation, and Accommodation Program is to improve the overall demonstrated reliability of digital electronic control systems for turbine engines.
Delaat, John C., Merrill, Walter C.
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Acoustic, performance, and wake survey measurements of a lobed velocity-decayer nozzle installed on a quieted TF-34 turbofan engine [PDF]
Results for three velocity decayer nozzle configurations are compared with those obtained with a separate flow coannular nozzle tested on the same quieted turbofan engine.
Heidelberg, L. J., Samanich, N. E.
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Aerodynamic design and performance testing of an advanced 30 deg swept, eight bladed propeller at Mach numbers from 0.2 to 0.85 [PDF]
The increased emphasis on fuel conservation in the world has stimulated a series of studies of both conventional and unconventional propulsion systems for commercial aircraft.
Black, D. M. +2 more
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DEAN: A program for dynamic engine analysis [PDF]
The Dynamic Engine Analysis program, DEAN, is a FORTRAN code implemented on the IBM/370 mainframe at NASA Lewis Research Center for digital simulation of turbofan engine dynamics.
Melcher, K. J., Sadler, G. G.
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The NASA high-speed turboprop program [PDF]
Technology readiness for Mach 0.7 to 0.8 turboprop powered aircraft with the potential for fuel savings and DOC reductions of up to 30 and 15 percent respectively relative to current in-service aircraft is addressed. The areas of propeller aeroacoustics,
Dugan, J. F. +3 more
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Development of dynamic simulation of TF34-GE-100 turbofan engine with post-stall capability [PDF]
This paper describes the development of a hybrid computer simulation of a TF34-GE-100 turbofan engine with post-stall capability. The simulation operates in real-time and will be used to test and evaluate stall recovery control modes for this engine. The
Krosel, S. M.
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Evaluation of a simplified gross thrust calculation technique using two prototype F100 turbofan engines in an altitude facility [PDF]
The technique which relies on afterburner duct pressure measurements and empirical corrections to an ideal one dimensional flow analysis to determine thrust is presented. A comparison of the calculated and facility measured thrust values is reported. The
Kurtenbach, F. J.
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Study of Turbofan Engines Designed for Low Enery Consumption [PDF]
Subsonic transport turbofan engine design and technology features which have promise of improving aircraft energy consumption are described. Task I addressed the selection and evaluation of features for the CF6 family of engines in current aircraft, and ...
Hirschkron, R. +2 more
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