The influence of reynolds number on soot concentration in turbulent non-premixed jet flames

S. M. Mahmoud, G. J. Nathan, Z. T. Alwahabi, Z. W. Sun, P. R. Medwell, B. B. Dally

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Soot volume fraction (SVF) was measured in six attached turbulent non-premixed jet flames of a C2H4-H2-N2 fuel mixture using the Laser-Induced Incandescence (LII) technique. The six flames comprise two sets with exit strain rates of 4100 and 7500 s-1, and one individual flame with an exit strain rate of 12,900 s-1. Within each set, the exit Reynolds number was changed both by varying the jet diameter and the fuel exit velocity. Measurements of the mean and radially-integrated SVF reveal a weak inverse dependence on the exit Reynolds number. The total soot yield was also found to be a strong function of both the exit strain and the flame volume, but to be almost independent of the exit Reynolds number. A non-negligible effect of buoyancy on SVF was also deduced from the global correlations.
Original languageEnglish (US)
Title of host publication11th Asia-Pacific Conference on Combustion, ASPACC 2017
PublisherCombustion Institute
StatePublished - Jan 1 2017
Externally publishedYes

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