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dc.contributor.authorLee, Changyoul
dc.contributor.authorAhmed, Ahfaz
dc.contributor.authorNasir, Ehson Fawad
dc.contributor.authorBadra, Jihad
dc.contributor.authorKalghatgi, Gautam
dc.contributor.authorSarathy, Mani
dc.contributor.authorCurran, Henry J.
dc.contributor.authorFarooq, Aamir
dc.date.accessioned2017-10-03T12:49:36Z
dc.date.available2017-10-03T12:49:36Z
dc.date.issued2017-08-14
dc.identifier.citationLee C, Ahmed A, Nasir EF, Badra J, Kalghatgi G, et al. (2017) Autoignition characteristics of oxygenated gasolines. Combustion and Flame 186: 114–128. Available: http://dx.doi.org/10.1016/j.combustflame.2017.07.034.
dc.identifier.issn0010-2180
dc.identifier.doi10.1016/j.combustflame.2017.07.034
dc.identifier.urihttp://hdl.handle.net/10754/625735
dc.description.abstractGasoline anti-knock quality, defined by the research and motor octane numbers (RON and MON), is important for increasing spark ignition (SI) engine efficiency. Gasoline knock resistance can be increased using a number of blending components. For over two decades, ethanol has become a popular anti-knock blending agent with gasoline fuels due to its production from bio-derived resources. This work explores the oxidation behavior of two oxygenated certification gasoline fuels and the variation of fuel reactivity with molecular composition. Ignition delay times of Haltermann (RON = 91) and Coryton (RON = 97.5) gasolines have been measured in a high-pressure shock tube and in a rapid compression machine at three pressures of 10, 20 and 40 bar, at equivalence ratios of φ = 0.45, 0.9 and 1.8, and in the temperature range of 650–1250 K. The results indicate that the effects of fuel octane number and fuel composition on ignition characteristics are strongest in the intermediate temperature (negative temperature coefficient) region. To simulate the reactivity of these gasolines, three kinds of surrogates, consisting of three, four and eight components, are proposed and compared with the gasoline ignition delay times. It is shown that more complex surrogate mixtures are needed to emulate the reactivity of gasoline with higher octane sensitivity (S = RON–MON). Detailed kinetic analyses are performed to illustrate the dependence of gasoline ignition delay times on fuel composition and, in particular, on ethanol content.
dc.description.sponsorshipResearch reported in this paper was funded by Saudi Aramco under the FUELCOM program and by King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0010218017302900
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Combustion and Flame. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Combustion and Flame, [, , (2017-08-14)] DOI: 10.1016/j.combustflame.2017.07.034 . © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectOxygenated gasoline
dc.subjectIgnition delay times
dc.subjectEthanol
dc.subjectShock tube
dc.subjectRapid compression machine
dc.titleAutoignition characteristics of oxygenated gasolines
dc.typeArticle
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentChemical Kinetics & Laser Sensors Laboratory
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentCombustion and Pyrolysis Chemistry (CPC) Group
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalCombustion and Flame
dc.eprint.versionPost-print
dc.contributor.institutionCombustion Chemistry Center, National University of Ireland Galway, Galway, Ireland
dc.contributor.institutionFuel Technology Center, Research and Development Center, Saudi Aramco, Dhahran, Saudi Arabia
kaust.personAhmed, Ahfaz
kaust.personNasir, Ehson Fawad
kaust.personSarathy, Mani
kaust.personFarooq, Aamir
refterms.dateFOA2019-08-14T00:00:00Z
dc.date.published-online2017-08-14
dc.date.published-print2017-12


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