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Structure and Soot Properties of Nonbuoyant Ethylene/Air Laminar Jet Diffusion FlamesThe structure and soot properties of round, soot-emitting, nonbuoyant, laminar jet diffusion flames are described, based on long-duration (175-230/s) experiments at microgravity carried out on orbit In the Space Shuttle Columbia. Experiments] conditions included ethylene-fueled flames burning in still air at nominal pressures of 50 and 100 kPa and an ambient temperature of 300 K with luminous Annie lengths of 49-64 mm. Measurements included luminous flame shapes using color video imaging, soot concentration (volume fraction) distributions using deconvoluted laser extinction imaging, soot temperature distributions using deconvoluted multiline emission imaging, gas temperature distributions at fuel-lean (plume) conditions using thermocouple probes, not structure distributions using thermophoretic sampling and analysis by transmission electron microscopy, and flame radiation using a radiometer. The present flames were larger, and emitted soot men readily, than comparable observed during ground-based microgravity experiments due to closer approach to steady conditions resulting from the longer test times and the reduced gravitational disturbances of the space-based experiments.
Document ID
20010117720
Acquisition Source
Glenn Research Center
Document Type
Reprint (Version printed in journal)
Authors
Urban, D. L.
(NASA Glenn Research Center Cleveland, OH United States)
Yuan, Z.-G.
(NASA Glenn Research Center Cleveland, OH United States)
Sunderland, P. B.
(NASA Glenn Research Center Cleveland, OH United States)
Linteris, G. T.
(NASA Johnson Space Center Houston, TX United States)
Voss, J. E.
(NASA Johnson Space Center Houston, TX United States)
Lin, K.-C.
(Michigan Univ. Ann Arbor, MI United States)
Dai, Z.
(Michigan Univ. Ann Arbor, MI United States)
Sun, K.
(Michigan Univ. Ann Arbor, MI United States)
Faeth, G. M.
(Michigan Univ. Ann Arbor, MI United States)
Ross, Howard D.
Date Acquired
August 20, 2013
Publication Date
December 15, 2000
Publication Information
Publication: Laminar Soot Processes (LSP)
Subject Category
Inorganic, Organic And Physical Chemistry
Funding Number(s)
CONTRACT_GRANT: NAG3-1245
CONTRACT_GRANT: NAG3-2048
CONTRACT_GRANT: NAG3-1878
Distribution Limits
Public
Copyright
Other

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