Title

Soot surface reactions in high-temperature laminar diffusion flames

Authors

Authors

A. M. El-Leathy; C. H. Kim; G. M. Faeth;F. Xu

Comments

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Abbreviated Journal Title

Aiaa J.

Keywords

PREMIXED METHANE/OXYGEN FLAMES; ATMOSPHERIC-PRESSURE; PRECURSOR; PARTICLES; ACETYLENE; GROWTH; AIR; PYROLYSIS; OXIDATION; IMPURITY; ACETONE; Engineering, Aerospace

Abstract

The structure and the soot surface growth and surface oxidation properties of round laminar jet diffusion flames were studied experimentally. Measurements were made along the axes of acetylene/argon-fueled flames burning at atmospheric pressure in coflowing oxygen/argon mixtures to provide higher temperature soot-containing regions (2000-2350 K) than were considered during earlier work. The measurements yielded soot surface growth and surface oxidation rates as well as the flame properties that are thought to control these rates. The present measurements of soot surface growth rates (corrected for soot surface oxidation) were consistent with earlier measurements in laminar premixed and diffusion flames having lower temperatures and exhibited good agreement with existing hydrogen-abstraction/carbon-addition soot surface growth rate mechanisms in the literature with steric factors of these mechanisms having values on the order of unity, as anticipated. Similarly, the present measurements of soot surface oxidation rates (corrected for soot surface growth) were consistent with earlier measurements in laminar premixed and diffusion flames having lower temperatures and exhibited good agreement with existing OH soot surface oxidation mechanisms in the literature, with a collision efficiency for OH of 0.13, in good agreement with past work, and supplemented to only a minor degree by direct soot surface oxidation by O-2.

Journal Title

Aiaa Journal

Volume

42

Issue/Number

5

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

988

Last Page

996

WOS Identifier

WOS:000221462700016

ISSN

0001-1452

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