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Laser Measurements of Soot and CO Production in Time-Varying, Hydrocarbon Diffusion Flames.


pdf icon Laser Measurements of Soot and CO Production in Time-Varying, Hydrocarbon Diffusion Flames. (98 K)
Shaddix, C. R.; Everest, D. A.; Smyth, K. C.

University of California, Berkeley. Toxic Toxic Combustion Byproducts. 4th International Congress. ABSTRACTS ONLY. June 5-7, 1995, Berkeley, CA, 59 pp, 1995.

Keywords:

combustion; soot; carbon monoxide; diffusion flames; hydrocarbons; lasers

Abstract:

Most combustion systems of practical interest involve hydrocarbon diffusion flames, in which chemical processes are strongly coupled to fluid mechanical mixing of the reactants through heat release. In complex flowfields, such as turbulent flames, many combinations of residence times, temperature histories, local stoichiometries, and strain rates exist which are not accessible in steady, laminar diffusion flames. One might anticipate that chemistry-flowfield interactions will have a dramatic impact whenever chemical reaction times are comparable to or slower than mixing rates. In particular, the rates of soot mass growth as well as of soot and carbon monoxide oxidation are relatively slow, and thus the production and emission of soot and CO should be strongly sensitive to the complex, time-varying flowfields present in flickering flames.