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A Preliminary Motion-picture Study of Combustion in a Compression-ignition EngineMotion pictures were taken at 1,850 frames per second of the spray penetration and combustion occurring in the N.A.C.A. combustion apparatus arranged to operate as a compression-ignition engine. Indicator cards were taken simultaneously with the motion pictures by means of the N.A.C.A. optical indicator. The motion pictures showed that when ignition occurred during injection it started in the spray envelope. If ignition occurred after injection cut-off, however, and after considerable mixing had taken place, it was impossible to predict where the ignition would start. The pictures also showed that ignition usually started at several points in the combustion chamber. With this apparatus, as the injection advance angle increased from 0 degrees to 40 degrees before top center, the rate of flame spread increased and the duration of the burning decreased.
Document ID
19930081522
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Buckley, E C
Waldron, C D
Date Acquired
September 6, 2013
Publication Date
April 1, 1934
Report/Patent Number
NACA-TN-496
Accession Number
93R10812
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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