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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Experimental and numerical study of a conical turbulent partially premixed flame
Proceedings of the Combustion Institute, Volume 32 II, No. 2, Year 2009
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Description
The structure and dynamics of a turbulent partially premixed methane/air flame in a conical burner were investigated using laser diagnostics and large-eddy simulations (LES). The flame structure inside the cone was characterized in detail using LES based on a two-scalar flamelet model, with the mixture fraction for the mixing field and level-set G-function for the partially premixed flame front propagation. In addition, planar laser induced florescence (PLIF) of CH and chemiluminescence imaging with high speed video were performed through a glass cone. CH and CH2O PLIF were also used to examine the flame structures above the cone. It is shown that in the entire flame the CH layer remains very thin, whereas the CH2O layer is rather thick. The flame is stabilized inside the cone a short distance above the nozzle. The stabilization of the flame can be simulated by the triple-flame model but not the flamelet-quenching model. The results show that flame stabilization in the cone is a result of premixed flame front propagation and flow reversal near the wall of the cone which is deemed to be dependent on the cone angle. Flamelet based LES is shown to capture the measured CH structures whereas the predicted CH2O structure is somewhat thinner than the experiments. © 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
Authors & Co-Authors
Li, B.
Sweden, Lund
Lunds Universitet
Baudoin, E.
Sweden, Lund
Lunds Universitet
Yu, R.
Sweden, Lund
Lunds Universitet
Sun, Zhiwei
Sweden, Lund
Lunds Universitet
Li, Z. S.
Sweden, Lund
Lunds Universitet
Bai, X. S.
Sweden, Lund
Lunds Universitet
Aldén, M.
Sweden, Lund
Lunds Universitet
Mansour, Mohy S.
Egypt, Giza
National Institute of Laser Enhanced Sciences
Statistics
Citations: 53
Authors: 8
Affiliations: 2
Identifiers
Doi:
10.1016/j.proci.2008.06.088
ISSN:
15407489
Research Areas
Environmental