Measurements of oxygenated C8/toluene flames in hot and vitiated coflows

M. J. Evans, J. Ye, S. Kruse, P. R. Medwell, Z. Sun, B. B. Dally, H. Pitsch

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

Abstract

Blends of oxygenated and aromatic fuels have been suggested for use as novel bio-diesel fuels. Blends of fuels such as toluene with octan-1-ol or its isomer, di-n-butyl ether, can provide similar energy content and cetane numbers to typical diesel fuels, but with significantly different sooting behaviours to conventional diesels. Six sooting, turbulent flames stabilised on a jet-in-hot-coflow burner are analysed in this work, through temperature and soot volume fraction measurements, obtained using non-linear excitation regime two-line atomic fluorescence (NTLAF) and laser-induced incandescence (LII), respectively. Comparisons of blending toluene with different ratios of either octan-1-ol or di-n-butyl ether show little change in flame temperatures despite significant differences in the sooting propensities of the flames. Results demonstrate that blends with di-n-butyl result in greater integrated soot volume fractions than with the alcohol, although the toluene/octan-1-ol blends exhibit higher peak soot volume fractions and more pronounced oxidation downstream of the peak soot region.
Original languageEnglish (US)
Title of host publication12th Asia-Pacific Conference on Combustion, ASPACC 2019
PublisherCombustion Institute
StatePublished - Jan 1 2019
Externally publishedYes

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