Measurements of oxygenated C8/toluene flames in hot and vitiated coflows
Date
2019
Authors
Evans, M.J.
Ye, J.
Kruse, S.
Medwell, P.R.
Sun, Z.
Dally, B.B.
Pitsch, H.G.
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Conference paper
Citation
12th Asia-Pacific Conference on Combustion, ASPACC 2019, 2019, pp.1-1
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12th Asia-Pacific Conference on Combustion, ASPACC 2019 (1 Jul 2019 - 5 Jul 2019 : Fukuoka, Japan)
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.
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Copyright 2019 Asia-Pacific Conference on Combustion, ASPACC 2019