Ignition of non-premixed counterflow flames of octane and decane isomers

Ning Liu; Mani Sarathy S. Mani Sarathy; Charles K. Westbrook; Fokion N. Egolfopoulos

doi:10.1016/j.proci.2012.05.040

Ignition of non-premixed counterflow flames of octane and decane isomers

Ning Liu^*, Mani Sarathy S. Mani Sarathy, Charles K. Westbrook, Fokion N. Egolfopoulos

^*Corresponding author for this work

Physical Sciences and Engineering

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

Ignition temperatures of non-premixed flames of octane and decane isomers were determined in the counterflow configuration at atmospheric pressure, a free-stream fuel/N₂ mixture temperature of 401 K, a local strain rate of 130 s^-1, and fuel mole fractions ranging from 1% to 6%. The experiments were modeled using detailed chemical kinetic mechanisms for all isomers that were combined with established H₂, CO, and n-alkane models, and close agreements were found for all flames considered. The results confirmed that increasing the degree of branching lowers the ignition propensity. On the other hand, increasing the straight chain length by two carbons was found to have no measurable effect on flame ignition for symmetric branched fuel structures. Detailed sensitivity analyses showed that flame ignition is sensitive primarily to the H₂/CO and C₁-C ₃ hydrocarbon kinetics for low degrees of branching, and to fuel-related reactions for the more branched molecules.

Original language	English (US)
Pages (from-to)	903-910
Number of pages	8
Journal	Proceedings of the Combustion Institute
Volume	34
Issue number	1
DOIs	https://doi.org/10.1016/j.proci.2012.05.040
State	Published - 2013

Bibliographical note

Funding Information:
The work was performed under the support on the Air Force Office of Scientific Research (Grants Nos. FA9550-10-1-0087 and FA9550-11-1-0217 ) under the technical supervision of Dr. Chiping Li, and under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory (Contract DE-AC52-07NA27344), with additional support from the US Department of Energy, Office of Vehicle Technologies (program manager Gurpreet Singh), and the Office of Naval Research (program manager Sharon Beermann-Curtin).

Keywords

Decane isomers
Flame ignition
Kinetic modeling
Non-premixed flames
Octane isomers

ASJC Scopus subject areas

General Chemical Engineering
Mechanical Engineering
Physical and Theoretical Chemistry

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10.1016/j.proci.2012.05.040

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title = "Ignition of non-premixed counterflow flames of octane and decane isomers",

abstract = "Ignition temperatures of non-premixed flames of octane and decane isomers were determined in the counterflow configuration at atmospheric pressure, a free-stream fuel/N2 mixture temperature of 401 K, a local strain rate of 130 s-1, and fuel mole fractions ranging from 1% to 6%. The experiments were modeled using detailed chemical kinetic mechanisms for all isomers that were combined with established H2, CO, and n-alkane models, and close agreements were found for all flames considered. The results confirmed that increasing the degree of branching lowers the ignition propensity. On the other hand, increasing the straight chain length by two carbons was found to have no measurable effect on flame ignition for symmetric branched fuel structures. Detailed sensitivity analyses showed that flame ignition is sensitive primarily to the H2/CO and C1-C 3 hydrocarbon kinetics for low degrees of branching, and to fuel-related reactions for the more branched molecules.",

keywords = "Decane isomers, Flame ignition, Kinetic modeling, Non-premixed flames, Octane isomers",

author = "Ning Liu and {S. Mani Sarathy}, {Mani Sarathy} and Westbrook, {Charles K.} and Egolfopoulos, {Fokion N.}",

note = "Funding Information: The work was performed under the support on the Air Force Office of Scientific Research (Grants Nos. FA9550-10-1-0087 and FA9550-11-1-0217 ) under the technical supervision of Dr. Chiping Li, and under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory (Contract DE-AC52-07NA27344), with additional support from the US Department of Energy, Office of Vehicle Technologies (program manager Gurpreet Singh), and the Office of Naval Research (program manager Sharon Beermann-Curtin). ",

year = "2013",

doi = "10.1016/j.proci.2012.05.040",

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pages = "903--910",

journal = "Proceedings of the Combustion Institute",

issn = "1540-7489",

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AU - Liu, Ning

AU - S. Mani Sarathy, Mani Sarathy

AU - Westbrook, Charles K.

AU - Egolfopoulos, Fokion N.

N1 - Funding Information: The work was performed under the support on the Air Force Office of Scientific Research (Grants Nos. FA9550-10-1-0087 and FA9550-11-1-0217 ) under the technical supervision of Dr. Chiping Li, and under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory (Contract DE-AC52-07NA27344), with additional support from the US Department of Energy, Office of Vehicle Technologies (program manager Gurpreet Singh), and the Office of Naval Research (program manager Sharon Beermann-Curtin).

PY - 2013

Y1 - 2013

N2 - Ignition temperatures of non-premixed flames of octane and decane isomers were determined in the counterflow configuration at atmospheric pressure, a free-stream fuel/N2 mixture temperature of 401 K, a local strain rate of 130 s-1, and fuel mole fractions ranging from 1% to 6%. The experiments were modeled using detailed chemical kinetic mechanisms for all isomers that were combined with established H2, CO, and n-alkane models, and close agreements were found for all flames considered. The results confirmed that increasing the degree of branching lowers the ignition propensity. On the other hand, increasing the straight chain length by two carbons was found to have no measurable effect on flame ignition for symmetric branched fuel structures. Detailed sensitivity analyses showed that flame ignition is sensitive primarily to the H2/CO and C1-C 3 hydrocarbon kinetics for low degrees of branching, and to fuel-related reactions for the more branched molecules.

AB - Ignition temperatures of non-premixed flames of octane and decane isomers were determined in the counterflow configuration at atmospheric pressure, a free-stream fuel/N2 mixture temperature of 401 K, a local strain rate of 130 s-1, and fuel mole fractions ranging from 1% to 6%. The experiments were modeled using detailed chemical kinetic mechanisms for all isomers that were combined with established H2, CO, and n-alkane models, and close agreements were found for all flames considered. The results confirmed that increasing the degree of branching lowers the ignition propensity. On the other hand, increasing the straight chain length by two carbons was found to have no measurable effect on flame ignition for symmetric branched fuel structures. Detailed sensitivity analyses showed that flame ignition is sensitive primarily to the H2/CO and C1-C 3 hydrocarbon kinetics for low degrees of branching, and to fuel-related reactions for the more branched molecules.

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KW - Kinetic modeling

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Ignition of non-premixed counterflow flames of octane and decane isomers

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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