Title

Experimental Study of Soot by Means of Extinction and Angular Scattering Measurements in a Laminar Non-Premixed Flame

Abstract

Laser scattering and extinction measurements were carried out in a co-flow ethylene laminar flame to characterize the whole soot field at different axial and radial locations. Argon-ion laser was used for measurements at 514.5-nm and the 3-point Abel method, a tomographic inversion technique, was chosen to determine the local extinction coefficients, which then generated soot volume fraction maps throughout the flame. Laser scattering measurements at 45°, 90°, and 135°were made to ascertain the diameter and number density of soot particles, and mean aggregate radius of gyration. The scattering system was calibrated by using nitrogen gas to include the sample volume, light collection efficiency, and photo multiplier sensitivity. The experiments were repeated at 30°and 150°since these scattering angles are more sensitive to the soot parameters. The analysis studied the nucleation and growth regions of the flame where soot formation dominates oxidation. The results were used to show the feasibility of using only two scattering angles for deriving the soot parameters. They were then used to resolve important issues in the soot nucleation region, especially regarding the soot precursor particles. Original is an abstract.

Meeting Name

International Symposium on Combustion Abstracts of Accepted Papers

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2000 Elsevier, All rights reserved.

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