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Soot formation during combustion of unsupported methanol/toluene mixture droplets in microgravityResults are reported of an experimental study tracing the influence of liquid composition on soot formation and the burning rate of a droplet composed of a binary miscible mixture of liquids. The mixture components represented a highly sooting fuel, toluene, and a nonsooting fuel, methanol. The toluene concentration in methanol was shown to dramatically influence flame luminosity and soot production. Neither burning rates nor a propensity for flame extinction appeared to be significantly affected by toluene mixture fractions. Five-percent toluene mixture droplets behaved like pure methanol droplets in terms of burning rate, lack of flame luminosity, and extinction. Increasing the toluene concentration in the droplets to 25 percent increased flame luminosity, yet no visible soot agglomerates were observed. The 50-percent-mixture droplets burned with highly luminous flames and large amounts of soot agglomerates collecting inside the flame. All the mixture droplets showed burning rates similar to those of pure methanol and likewise exhibited flame extinction before complete droplet vaporization.
Document ID
19920032254
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jackson, G. S.
(Cornell Univ. Ithaca, NY, United States)
Avedisian, C. T.
(Cornell Univ. Ithaca, NY, United States)
Yang, J. C.
(Cornell University Ithaca, NY, United States)
Date Acquired
August 15, 2013
Publication Date
November 8, 1991
Publication Information
Publication: Proceedings, Series A - Mathematical and Physical Sciences
Volume: 435
Issue: 1894
ISSN: 0080-4630
Subject Category
Materials Processing
Accession Number
92A14878
Funding Number(s)
CONTRACT_GRANT: NSF CBT-84-51075
CONTRACT_GRANT: NAG3-987
Distribution Limits
Public
Copyright
Other

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