Title

Experimental Investigation of Soot Formation in Turbulent Hydrocarbon Flames

Abstract

Soot-containing turbulent non-premixed flames burning two hydrocarbon fuels in atmospheric-pressure air were studied. Highly luminous acetylene at two different Reynolds numbers and a lightly sooting propane flame were stabilized on a simple unconfined axisymmetric geometry to focus on various aerosol processes. Optical measurements of laser scattering at two angles and extinction were conducted at different axial and radial flame locations. The data was interpreted based on an approximate scattering theory that properly accounts for the actual soot morphology represented by fractal aggregates of small spherical particles. Mean soot properties of principal interest, soot volume fraction, spherule diameter, and aggregate radius of gyration were quantified. Decoupling the spherule diameter from the overall aggregate size during the present experiments was deemed essential for the separation of various soot mechanisms from each other, especially particle surface growth and oxidation from the unavoidable aggregation. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).

Meeting Name

30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Combustion Institute, All rights reserved.

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