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dc.contributor.authorJaved, Tamour
dc.contributor.authorAhmed, Ahfaz
dc.contributor.authorLovisotto, Leonardo
dc.contributor.authorIssayev, Gani
dc.contributor.authorBadra, Jihad
dc.contributor.authorSarathy, Mani
dc.contributor.authorFarooq, Aamir
dc.date.accessioned2017-10-03T12:49:34Z
dc.date.available2017-10-03T12:49:34Z
dc.date.issued2017-07-24
dc.identifier.citationJaved T, Ahmed A, Lovisotto L, Issayev G, Badra J, et al. (2017) Ignition studies of two low-octane gasolines. Combustion and Flame 185: 152–159. Available: http://dx.doi.org/10.1016/j.combustflame.2017.07.006.
dc.identifier.issn0010-2180
dc.identifier.doi10.1016/j.combustflame.2017.07.006
dc.identifier.urihttp://hdl.handle.net/10754/625701
dc.description.abstractLow-octane gasolines (RON ∼ 50–70 range) are prospective fuels for gasoline compression ignition (GCI) internal combustion engines. GCI technology utilizing low-octane fuels has the potential to significantly improve well-to-wheel efficiency and reduce the transportation sector's environmental footprint by offsetting diesel fuel usage in compression ignition engines. In this study, ignition delay times of two low-octane FACE (Fuels for Advanced Combustion Engines) gasolines, FACE I and FACE J, were measured in a shock tube and a rapid compression machine over a broad range of engine-relevant conditions (650–1200 K, 20 and 40 bar and ϕ = 0.5 and 1). The two gasolines are of similar octane ratings with anti-knock index, AKI = (RON + MON)/2, of ∼ 70 and sensitivity, S = RON–MON, of ∼ 3. However, the molecular compositions of the two gasolines are notably different. Experimental ignition delay time results showed that the two gasolines exhibited similar reactivity over a wide range of test conditions. Furthermore, ignition delay times of a primary reference fuel (PRF) surrogate (n-heptane/iso-octane blend), having the same AKI as the FACE gasolines, captured the ignition behavior of these gasolines with some minor discrepancies at low temperatures (T < 700 K). Multi-component surrogates, formulated by matching the octane ratings and compositions of the two gasolines, emulated the autoignition behavior of gasolines from high to low temperatures. Homogeneous charge compression ignition (HCCI) engine simulations were used to show that the PRF and multi-component surrogates exhibited similar combustion phasing over a wide range of engine operating conditions.
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) under the Competitive Center Funding program.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0010218017302511
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, [, , (2017-07-24)] DOI: 10.1016/j.combustflame.2017.07.006 . © 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.subjectLow-octane gasolines
dc.subjectNaphtha
dc.subjectIgnition delay
dc.subjectShock tube
dc.subjectRapid compression machine
dc.subjectSurrogates
dc.titleIgnition studies of two low-octane 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.institutionUniversita degli Studi di Padova, Padova, Italy
dc.contributor.institutionSaudi Aramco Research and Development Center, Fuel Technology R&D Division, Dhahran 31311, Saudi Arabia
kaust.personJaved, Tamour
kaust.personAhmed, Ahfaz
kaust.personLovisotto, Leonardo
kaust.personIssayev, Gani
kaust.personSarathy, Mani
kaust.personFarooq, Aamir
refterms.dateFOA2019-07-24T00:00:00Z
dc.date.published-online2017-07-24
dc.date.published-print2017-11


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