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dc.contributor.authorLee, Changyoul
dc.contributor.authorAhmed, Ahfaz
dc.contributor.authorNasir, Ehson F.
dc.contributor.authorBadra, Jihad
dc.contributor.authorKalghatgi, Gautam
dc.contributor.authorSarathy, S. Mani
dc.contributor.authorCurran, Henry J.
dc.contributor.authorFarooq, Aamir
dc.date.accessioned2019-01-11T11:23:12Z
dc.date.issued2017-08-14
dc.identifier.citationLee, Changyoul, Ahmed, Ahfaz, Nasir, Ehson F., Badra, Jihad, Kalghatgi, Gautam, Sarathy, S. Mani, Curran, Henry J., Farooq, Aamir. (2017). Autoignition characteristics of oxygenated gasolines. Combustion and Flame, 186, 114-128. doi: 10.1016/j.combustflame.2017.07.034en_IE
dc.identifier.issn1556-2921
dc.identifier.urihttp://hdl.handle.net/10379/14793
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 phi = 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. (C) 2017 The Combustion Institute. Published by Elsevier Inc. All rights reserved.en_IE
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).en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherElsevieren_IE
dc.relation.ispartofCombustion And Flameen
dc.subjectOxygenated gasolineen_IE
dc.subjectIgnition delay timesen_IE
dc.subjectEthanolen_IE
dc.subjectShock tubeen_IE
dc.subjectRapid compression machineen_IE
dc.subjectRAPID COMPRESSION MACHINEen_IE
dc.subjectINTERNAL-COMBUSTION ENGINESen_IE
dc.subjectCHEMICAL KINETIC MECHANISMen_IE
dc.subjectLOW-TEMPERATURE COMBUSTIONen_IE
dc.subjectTOLUENE REFERENCE FUELSen_IE
dc.subjectSHOCK-TUBE IGNITIONen_IE
dc.subjectOCTANE NUMBERSen_IE
dc.subjectN-HEPTANEen_IE
dc.subjectSURROGATE MIXTURESen_IE
dc.subjectHCCI AUTOIGNITIONen_IE
dc.titleAutoignition characteristics of oxygenated gasolinesen_IE
dc.typeArticleen_IE
dc.date.updated2019-01-08T11:17:41Z
dc.identifier.doi10.1016/j.combustflame.2017.07.034
dc.local.publishedsourcehttps://doi.org/10.1016/j.combustflame.2017.07.034en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funderSaudi Aramcoen_IE
dc.contributor.funderKing Abdullah University of Science and Technologyen_IE
dc.description.embargo2019-08-14
dc.internal.rssid13386050
dc.local.contactHenry Curran, Dept Of Chemistry, Room 215, Arts/Science Building, Nui Galway. 3856 Email: henry.curran@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionACCEPTED
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