TY - JOUR
T1 - Ignition of non-premixed counterflow flames of octane and decane isomers
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.
KW - Decane isomers
KW - Flame ignition
KW - Kinetic modeling
KW - Non-premixed flames
KW - Octane isomers
UR - http://www.scopus.com/inward/record.url?scp=84873386989&partnerID=8YFLogxK
U2 - 10.1016/j.proci.2012.05.040
DO - 10.1016/j.proci.2012.05.040
M3 - Article
AN - SCOPUS:84873386989
SN - 1540-7489
VL - 34
SP - 903
EP - 910
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
IS - 1
ER -