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Effect of Moderate Air Flow on the Distribution of Fuel Sprays After Injection Cut-0ffHigh-speed motion pictures were taken of fuel sprays with the NACA spray-photographic apparatus to study the distribution of the liquid fuel from the instant of injection cut-off until about 0.05 second later. The fuel was injected into a glass-walled chamber in which the air density was varied from 1 to 13 times atmospheric air density (0.0765 to 0.99 pound per cubic foot) and in which the air was at room temperature. The air in the chamber was set in motion by means of a fan, and was directed counter to the spray at velocities up to 27 feet per second. The injection pressure was varied from 2,000 to 6,000 pounds per square inch. A 0.20-inch single-orifice nozzle, an 0.008-inch single-orifice nozzle, a multiorifice nozzle, and an impinging-jets nozzle were used. The best distribution was obtained by the use of air and a high-dispersion nozzle.
Document ID
19930091557
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Rothrock, A M
Spencer, R C
Date Acquired
September 6, 2013
Publication Date
January 1, 1935
Report/Patent Number
NACA-TR-483
Accession Number
93R20847
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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