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On the structure and extinction of partially-premixed flames

Conference ·
OSTI ID:5127983
; ;
The interaction and extinction dynamics of a partially-premixed flame ensemble, consisting of a premixed flame and a nonpremixed flame, are theoretically and experimentally studied for the counterflow configuration generated by a premixed fuel/oxidizer/inert stream and a fuel/inert stream. Theoretical results show that, depending on the relative intensities of the two flames, extinction of either the nonpremixed or the premixed flame can occur first, leading to either complete flame extinction of the creation of a merged flame. Experimental results show that extinction of both flames always occurs simultaneously, and that at extinction the two flames can be either merged or separated depending on their relative stoichiometries and the preferential diffusion nature of the mixtures.
OSTI ID:
5127983
Report Number(s):
CONF-870484-
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DIFFUSION
DISPERSIONS
FLAME PROPAGATION
FLAMES
INERT ATMOSPHERE
KINETICS
MIXTURES
OXIDIZERS
REACTION KINETICS
STRUCTURAL CHEMICAL ANALYSIS
THERMAL DIFFUSION