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Type: Conference paper
Title: Global characteristics of hydrogen-hydrocarbon blended fuels turbulent diffusion flames
Author: Dong, X.
Ashman, P.
Nathan, G.
Citation: Proceedings of the Australian Combustion Symposium, Perth, WA, 6-8 November 2013 / Mingming Zhu, Yu Ma, Yun Yu, Hari Vuthaluru, Zhezi Zhang and Dongke Zhang (eds.): pp.267-270
Publisher: The Combustion Institue
Publisher Place: Online
Issue Date: 2013
Conference Name: Australian Combustion Symposium (4th: 2013 : Perth, Western Australia)
Statement of
Dong, X., Ashman, P.J., Nathan. G.J.
Abstract: The global performance of a series of attached turbulent diffusion flames using different hydrogen-ethylene fuel blends is reported for H2 volume fractions varying from 33 to 100%. The parameters assessed are the flame length, radiant fraction and emission indices of NOx and CO. For blended flames with constant exit strain rate, a transition regime was found for H2 fractions in the range 50%-65%. Below this range the flames are ethylene dominated while above this they are hydrogen dominated. The normalized flame length, Lf/dj, decreases with an increasing H2/mix ratio and this relationship becomes approximately linear as H2 fraction is varied from 70% to 100%. The NOx emission index for blended fuels tends to increase with H2 fraction, although for lower strain rate the trend is reversed for H2 fractions above 70%. The CO emission index also generally increases with H2 fraction for ethylene-hydrogen flames, except for very high H2 fractions, especially for flames with lower strain rate.
Keywords: hydrogen-hydrocarbon blended fuels
turbulent diffusion flames
radiation fraction
pollutant emissions
Rights: © the authors
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Chemical Engineering publications

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