Primary Reference Fuels (PRFs) as Surrogates for Low Sensitivity Gasoline Fuels

Handle URI:
http://hdl.handle.net/10754/618129
Title:
Primary Reference Fuels (PRFs) as Surrogates for Low Sensitivity Gasoline Fuels
Authors:
Bhavani Shankar, Vijai Shankar; Sajid, Muhammad Bilal ( 0000-0002-6341-0918 ) ; Al-Qurashi, Khalid; Atef, Nour; Al Khesho, Issam; Ahmed, Ahfaz; Chung, Sukho; Roberts, William L. ( 0000-0003-1999-2831 ) ; Morganti, Kai; Sarathy, Mani ( 0000-0002-3975-6206 )
Abstract:
Primary Reference Fuels (PRFs) - binary mixtures of n-heptane and iso-octane based on Research Octane Number (RON) - are popular gasoline surrogates for modeling combustion in spark ignition engines. The use of these two component surrogates to represent real gasoline fuels for simulations of HCCI/PCCI engines needs further consideration, as the mode of combustion is very different in these engines (i.e. the combustion process is mainly controlled by the reactivity of the fuel). This study presents an experimental evaluation of PRF surrogates for four real gasoline fuels termed FACE (Fuels for Advanced Combustion Engines) A, C, I, and J in a motored CFR (Cooperative Fuels Research) engine. This approach enables the surrogate mixtures to be evaluated purely from a chemical kinetic perspective. The gasoline fuels considered in this study have very low sensitivities, S (RON-MON), and also exhibit two-stage ignition behavior. The first stage heat release, which is termed Low Temperature Heat Release (LTHR), controls the combustion phasing in this operating mode. As a result, the performance of the PRF surrogates was evaluated by its ability to mimic the low temperature chemical reactivity of the real gasoline fuels. This was achieved by comparing the LTHR from the engine pressure histories. The PRF surrogates were able to consistently reproduce the amount of LTHR, closely match the phasing of LTHR, and the compression ratio for the start of hot ignition of the real gasoline fuels. This suggests that the octane quality of a surrogate fuel is a good indicator of the fuel’s reactivity across low (LTC), negative temperature coefficient (NTC), and high temperature chemical (HTC) reactivity regimes.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center
Citation:
Bhavani Shankar, V., Sajid, M., Al-Qurashi, K., Atef, N. et al., "Primary Reference Fuels (PRFs) as Surrogates for Low Sensitivity Gasoline Fuels," SAE Technical Paper 2016-01-0748, 2016, doi:10.4271/2016-01-0748.
Publisher:
SAE International
Journal:
SAE Technical Paper Series
Conference/Event name:
SAE 2016 World Congress and Exhibition
Issue Date:
5-Apr-2016
DOI:
10.4271/2016-01-0748
Type:
Conference Paper
Sponsors:
The authors wish to thank Adrian Ichim for performing the engine experiments. This work was supported by KAUST and the Saudi Aramco FUELCOM program.
Additional Links:
http://papers.sae.org/2016-01-0748/
Appears in Collections:
Conference Papers

Full metadata record

DC FieldValue Language
dc.contributor.authorBhavani Shankar, Vijai Shankaren
dc.contributor.authorSajid, Muhammad Bilalen
dc.contributor.authorAl-Qurashi, Khaliden
dc.contributor.authorAtef, Nouren
dc.contributor.authorAl Khesho, Issamen
dc.contributor.authorAhmed, Ahfazen
dc.contributor.authorChung, Sukhoen
dc.contributor.authorRoberts, William L.en
dc.contributor.authorMorganti, Kaien
dc.contributor.authorSarathy, Manien
dc.date.accessioned2016-08-10T07:02:30Z-
dc.date.available2016-08-10T07:02:30Z-
dc.date.issued2016-04-05-
dc.identifier.citationBhavani Shankar, V., Sajid, M., Al-Qurashi, K., Atef, N. et al., "Primary Reference Fuels (PRFs) as Surrogates for Low Sensitivity Gasoline Fuels," SAE Technical Paper 2016-01-0748, 2016, doi:10.4271/2016-01-0748.en
dc.identifier.doi10.4271/2016-01-0748-
dc.identifier.urihttp://hdl.handle.net/10754/618129-
dc.description.abstractPrimary Reference Fuels (PRFs) - binary mixtures of n-heptane and iso-octane based on Research Octane Number (RON) - are popular gasoline surrogates for modeling combustion in spark ignition engines. The use of these two component surrogates to represent real gasoline fuels for simulations of HCCI/PCCI engines needs further consideration, as the mode of combustion is very different in these engines (i.e. the combustion process is mainly controlled by the reactivity of the fuel). This study presents an experimental evaluation of PRF surrogates for four real gasoline fuels termed FACE (Fuels for Advanced Combustion Engines) A, C, I, and J in a motored CFR (Cooperative Fuels Research) engine. This approach enables the surrogate mixtures to be evaluated purely from a chemical kinetic perspective. The gasoline fuels considered in this study have very low sensitivities, S (RON-MON), and also exhibit two-stage ignition behavior. The first stage heat release, which is termed Low Temperature Heat Release (LTHR), controls the combustion phasing in this operating mode. As a result, the performance of the PRF surrogates was evaluated by its ability to mimic the low temperature chemical reactivity of the real gasoline fuels. This was achieved by comparing the LTHR from the engine pressure histories. The PRF surrogates were able to consistently reproduce the amount of LTHR, closely match the phasing of LTHR, and the compression ratio for the start of hot ignition of the real gasoline fuels. This suggests that the octane quality of a surrogate fuel is a good indicator of the fuel’s reactivity across low (LTC), negative temperature coefficient (NTC), and high temperature chemical (HTC) reactivity regimes.en
dc.description.sponsorshipThe authors wish to thank Adrian Ichim for performing the engine experiments. This work was supported by KAUST and the Saudi Aramco FUELCOM program.en
dc.publisherSAE Internationalen
dc.relation.urlhttp://papers.sae.org/2016-01-0748/en
dc.rightsArchived with thanks to SAE 2016 World Congress and Exhibitionen
dc.titlePrimary Reference Fuels (PRFs) as Surrogates for Low Sensitivity Gasoline Fuelsen
dc.typeConference Paperen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalSAE Technical Paper Seriesen
dc.conference.dateApril 12-14, 2016en
dc.conference.nameSAE 2016 World Congress and Exhibitionen
dc.conference.locationCobo Center Detroit, MI, USAen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSaudi Aramcoen
kaust.authorBhavani Shankar, Vijai Shankaren
kaust.authorSajid, Muhammad Bilalen
kaust.authorAl-Qurashi, Khaliden
kaust.authorAtef, Nouren
kaust.authorAl Khesho, Issamen
kaust.authorAhmed, Ahfazen
kaust.authorChung, Sukhoen
kaust.authorRoberts, William L.en
kaust.authorSarathy, Manien
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