Investigation of Altitude Starting and Acceleration Characteristics of J47 Turbojet EngineAn investigation was conducted on an axial-flow-compressor type turbojet engine in the NACA Lewis altitude wind tunnel to determine the operational characteristics of several ignition systems, cross-fire tube configurations and fuel systems over a range of simulated flight conditions. The opposite-polarity-type spark plug provided the most satisfactory ignition. Increasing the cross-fire-tube diameter improved intercombustor flame propagation. At high windmilling speeds, accelerations to approximately 6200 rpm could be made at a preset constant throttle position. The use of a variable-area nozzle reduced acceleration time.
Document ID
19930086343
Document Type
Other
Authors
Golladay, Richard L
Bloomer, Harry E
Date Acquired
August 16, 2013
Publication Date
January 10, 1951
Report/Patent Number
NACA-RM-E50G07
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
IGNITION SYSTEMSENGINES, TURBOJETFUEL SYSTEMS - ENGINES, TURBOJETSTARTING SYSTEMSCOMBUSTION - IGNITION OF GASES
