An experimental and modeling study of the propagation of cyclohexane and mono-alkylated cyclohexane flames
Identifieur interne : 000C24 ( Main/Merge ); précédent : 000C23; suivant : 000C25An experimental and modeling study of the propagation of cyclohexane and mono-alkylated cyclohexane flames
Auteurs : C. Ji [États-Unis] ; E. Dames [États-Unis] ; B. Sirjean [France] ; H. Wang [États-Unis] ; F. N. Egolfopoulos [États-Unis]Source :
- Proceedings of the Combustion Institute [ 1540-7489 ] ; 2011.
English descriptors
Abstract
Laminar flame speeds of cyclohexane/air, methylcyclohexane/air, ethylcyclohexane/air, n-propylcyclohexane/air, and n-butylcyclohexane/air mixtures were determined in the counterflow configuration at atmospheric pressure, unburned mixture temperature of 353 K, and for a wide range of equivalence ratios. The results indicate that cyclohexane/air flames propagate somewhat faster than mono-alkylated cyclohexane/air flames. Flames of mono-alkylated cyclohexane compounds were found to have similar laminar flame speeds, from methylcyclohexane to n-butylcyclohexane, suggesting that the different alkyl groups have a secondary effect on flame propagation. The experiments were modeled using JetSurF (version 1.1) - a detailed kinetic model for the combustion of cyclohexane and its derivatives. Both experiment and model show satisfactory agreement with each other. Based on the analysis of the model results, the somewhat lower rates of mono-alkylated cyclohexane flame propagation are attributed to the greater production of propene and allyl and the increased H-atom scavenging by these C3 intermediates. Though these fuel-specific reaction kinetic features do not limit the overall oxidation rates, the distribution of the cracked products do exert influences on flame propagation, leading to the subtle differences in the laminar flame speeds observed experimentally. © 2010 Published by Elsevier Inc. on behalf of The Combustion Institute. All rights reserved.
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DOI: 10.1016/j.proci.2010.06.099
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Egolfopoulos</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-160629" status="INCOMING"><orgName>Department of Aerospace and Mechanical Engineering</orgName><desc><address><addrLine>Los Angeles, CA 90089-1453</addrLine><country key="US"></country></address></desc><listRelation><relation active="#struct-85559" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-85559" type="direct"><org type="institution" xml:id="struct-85559" status="VALID"><orgName>University of Southern California [Los Angeles]</orgName><orgName type="acronym">USC</orgName><desc><address><addrLine>Los Angeles, CA, 90089-0484, USA</addrLine><country key="US"></country></address><ref type="url">http://www.usc.edu/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>États-Unis</country></affiliation></author></analytic><idno type="DOI">10.1016/j.proci.2010.06.099</idno><series><title level="j">Proceedings of the Combustion Institute</title><idno type="ISSN">1540-7489</idno><imprint><date type="datePub">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>Alkylated cyclohexane</term><term>Cyclohexane</term><term>Flame propagation</term><term>Kinetic models</term><term>Surrogate fuels</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Laminar flame speeds of cyclohexane/air, methylcyclohexane/air, ethylcyclohexane/air, n-propylcyclohexane/air, and n-butylcyclohexane/air mixtures were determined in the counterflow configuration at atmospheric pressure, unburned mixture temperature of 353 K, and for a wide range of equivalence ratios. The results indicate that cyclohexane/air flames propagate somewhat faster than mono-alkylated cyclohexane/air flames. Flames of mono-alkylated cyclohexane compounds were found to have similar laminar flame speeds, from methylcyclohexane to n-butylcyclohexane, suggesting that the different alkyl groups have a secondary effect on flame propagation. The experiments were modeled using JetSurF (version 1.1) - a detailed kinetic model for the combustion of cyclohexane and its derivatives. Both experiment and model show satisfactory agreement with each other. Based on the analysis of the model results, the somewhat lower rates of mono-alkylated cyclohexane flame propagation are attributed to the greater production of propene and allyl and the increased H-atom scavenging by these C3 intermediates. Though these fuel-specific reaction kinetic features do not limit the overall oxidation rates, the distribution of the cracked products do exert influences on flame propagation, leading to the subtle differences in the laminar flame speeds observed experimentally. © 2010 Published by Elsevier Inc. on behalf of The Combustion Institute. All rights reserved.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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