Show simple item record

dc.contributor.authorRaman, Vallinayagam
dc.contributor.authorTang, Qinglong
dc.contributor.authorAn, Yanzhao
dc.contributor.authorShi, Hao
dc.contributor.authorSharma, Priybrat
dc.contributor.authorMagnotti, Gaetano
dc.contributor.authorChang, Junseok
dc.contributor.authorJohansson, Bengt
dc.date.accessioned2020-01-30T11:34:15Z
dc.date.available2020-01-30T11:34:15Z
dc.date.issued2020-02-12
dc.date.submitted2019-10-14
dc.identifier.citationRaman, V., Tang, Q., An, Y., Shi, H., Sharma, P., Magnotti, G., … Johansson, B. (2020). Impact of spray-wall interaction on the in-cylinder spatial unburned hydrocarbon distribution of a gasoline partially premixed combustion engine. Combustion and Flame, 215, 157–168. doi:10.1016/j.combustflame.2020.01.033
dc.identifier.doi10.1016/j.combustflame.2020.01.033
dc.identifier.urihttp://hdl.handle.net/10754/661332
dc.description.abstractPartially premixed combustion (PPC) often adopts the early fuel-injection strategy that could result in spray-wall interaction involved with piston top-land crevice. This interaction may produce a significant impact on engine combustion and unburned hydrocarbons (UHC) emission, which is still not well understood. In this study, we investigated the detailed spray-wall interaction and its effects on the two-stage ignition, i.e. low- and high-temperature heat release (LTHR and HTHR), and the in-cylinder spatial UHC distribution of PPC in a full-view optical engine at low engine load. The PRF 70 fuel was used as the gasoline surrogate. The high-speed imaging of the natural flame luminosity was acquired to quantify the flame probability distribution. The qualitative fuel-tracer, formaldehyde, and UHC planar laser-induced fluorescence (PLIF) imaging techniques were employed to reveal the fuel, LTHR and UHC distribution characteristics, respectively. The LTHR, HTHR and UHC distribution formed by the fuel trapped in the piston top-land crevice were visualized by PLIF imaging techniques for the first time. The PLIF results indicate that the main UHC formed in the PPC engine comes from the central part of the cylinder close to the injector nozzle, where the overall equivalence ratio is low and the injector dribbling is an important source of UHC. The UHC formed in the piston crevice of the PPC engine depends on the local equivalence ratio of the fuel trapped in the crevice. When the overall equivalence ratio of the charge in the crevice is relatively high, the trapped fuel undergoes both LTHR and HTHR and produces negligible UHC. However, the UHC from the piston crevice becomes considerable when the fuel injection timing is too early so that an overly lean mixture is generated. Based on the above findings, three implications of the PPC operation at low engine load for low UHC emission and high engine efficiency are proposed.
dc.description.sponsorshipThis work was funded by the competitive research funding from King Abdullah University of Science and Technology (KAUST) and the FUELCOM2 program from Saudi Aramco. The authors would like to express our gratitude to our research technicians, Riyadh Jambi and Adrian. I. Ichim for their support during the experiment at the KAUST engine lab.
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0010218020300456
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, [[Volume], [Issue], (2020-02-12)] DOI: 10.1016/j.combustflame.2020.01.033 . © 2020. 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.titleImpact of spray-wall interaction on the in-cylinder spatial unburned hydrocarbon distribution of a gasoline partially premixed combustion engine
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentKing Abdullah University of Science and Technology, Clean Combustion Research Center, Thuwal, 23900, Saudi Arabia
dc.contributor.departmentMechanical Engineering
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalCombustion and Flame
dc.rights.embargodate2022-02-12
dc.eprint.versionPost-print
dc.contributor.institutionFuel Technology Division, R&DC, Saudi Aramco, Dhahran 31311, Saudi Arabia
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
pubs.publication-statusAccepted
kaust.personTang, Qinglong
kaust.personAn, Yanzhao
kaust.personShi, Hao
kaust.personSharma, Priybrat
kaust.personMagnotti, Gaetano
kaust.personJohansson, Bengt
dc.date.accepted2020-01-30
kaust.acknowledged.supportUnitKAUST engine lab
dc.date.published-online2020-02-12
dc.date.published-print2020-05


Files in this item

Thumbnail
Name:
2-Impact of spray-wall interaction on the in-cylinder spatial unburned hydrocarbon distribution of a gasoline partially premixed combustion engine.pdf
Size:
1.469Mb
Format:
PDF
Description:
Accepted Manuscript
Embargo End Date:
2022-01-30

This item appears in the following Collection(s)

Show simple item record