Ignition studies of two low-octane gasolines

Handle URI:
http://hdl.handle.net/10754/625701
Title:
Ignition studies of two low-octane gasolines
Authors:
Javed, Tamour ( 0000-0002-3328-9061 ) ; Ahmed, Ahfaz ( 0000-0001-5982-3464 ) ; Lovisotto, Leonardo ( 0000-0001-6929-0526 ) ; Issayev, Gani; Badra, Jihad; Sarathy, Mani ( 0000-0002-3975-6206 ) ; Farooq, Aamir ( 0000-0001-5296-2197 )
Abstract:
Low-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.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division
Citation:
Javed 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.
Publisher:
Elsevier BV
Journal:
Combustion and Flame
Issue Date:
24-Jul-2017
DOI:
10.1016/j.combustflame.2017.07.006
Type:
Article
ISSN:
0010-2180
Sponsors:
Research 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.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0010218017302511
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorJaved, Tamouren
dc.contributor.authorAhmed, Ahfazen
dc.contributor.authorLovisotto, Leonardoen
dc.contributor.authorIssayev, Ganien
dc.contributor.authorBadra, Jihaden
dc.contributor.authorSarathy, Manien
dc.contributor.authorFarooq, Aamiren
dc.date.accessioned2017-10-03T12:49:34Z-
dc.date.available2017-10-03T12:49:34Z-
dc.date.issued2017-07-24en
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.en
dc.identifier.issn0010-2180en
dc.identifier.doi10.1016/j.combustflame.2017.07.006en
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.en
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.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0010218017302511en
dc.subjectLow-octane gasolinesen
dc.subjectNaphthaen
dc.subjectIgnition delayen
dc.subjectShock tubeen
dc.subjectRapid compression machineen
dc.subjectSurrogatesen
dc.titleIgnition studies of two low-octane gasolinesen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalCombustion and Flameen
dc.contributor.institutionUniversita degli Studi di Padova, Padova, Italyen
dc.contributor.institutionSaudi Aramco Research and Development Center, Fuel Technology R&D Division, Dhahran 31311, Saudi Arabiaen
kaust.authorJaved, Tamouren
kaust.authorAhmed, Ahfazen
kaust.authorLovisotto, Leonardoen
kaust.authorIssayev, Ganien
kaust.authorSarathy, Manien
kaust.authorFarooq, Aamiren
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