Show simple item record

dc.contributor.authorAn, Yanzhao
dc.contributor.authorJaasim, Mohammed
dc.contributor.authorRaman, Vallinayagam
dc.contributor.authorIm, Hong G.
dc.contributor.authorJohansson, Bengt
dc.date.accessioned2018-01-15T06:10:40Z
dc.date.available2018-01-15T06:10:40Z
dc.date.issued2018-01-27
dc.identifier.citationAn Y, Mubarak Ali MJ, Raman V, Im HG, Johansson B (2018) In-cylinder Combustion and Soot Evolution in the Transition from Conventional CI mode to PPC. Energy & Fuels. Available: http://dx.doi.org/10.1021/acs.energyfuels.7b02535.
dc.identifier.issn0887-0624
dc.identifier.issn1520-5029
dc.identifier.doi10.1021/acs.energyfuels.7b02535
dc.identifier.urihttp://hdl.handle.net/10754/626757
dc.description.abstractThe present study intends to explore the in-cylinder combustion and evolution of soot emission during the transition from conventional compression ignition (CI) combustion to partially premixed combustion (PPC) at low load conditions. In-cylinder combustion images and engine-out emissions were measured in an optical engine fueled with low octane heavy naphtha fuel (RON = 50). Full cycle engine simulations were performed using a three-dimensional computational fluid dynamics code CONVERGETM, coupled with gas phase chemical kinetics, turbulence, and particulate size mimic soot model. The simulations were performed under low load conditions (IMEP ~ 2 to 3 bar) at an engine speed of 1200 rpm. The start of injection (SOI) was advanced from late (-10 CAD aTDC) to early fuel injection timings (-40 CAD aTDC) to realize the combustion transition from CI combustion to PPC. The simulation results of combustion and emission are compared with the experimental results at both CI and PPC combustion modes. The results of the study show a typical low-temperature stratified lean combustion at PPC mode, while high-temperature spray-driven combustion is evident at CI mode. The in-cylinder small intermediates species such as acetylene (C2H2), propargyl (C3H3), cyclopentadienyl (C5H5) and polycyclic aromatic hydrocarbons (PAHs) were significantly suppressed at PPC mode. Nucleation reaction of PAHs collision contributed to main soot mass production. The distribution of soot mass and particle number density was consistent with the distribution of high-temperature zones at CI and PPC combustion modes.
dc.description.sponsorshipThis work was funded by competitive research funding from King Abdullah University of Science and Technology (KAUST), and by Saudi Aramco under the FUELCOM-II program. The authors would like to thank Adrian. I. Ichim and Riyad Jambi for their technical support in conducting the engine experiments, and Convergent Science for providing licenses for the CONVERGE software.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/10.1021/acs.energyfuels.7b02535
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Energy & Fuels, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/10.1021/acs.energyfuels.7b02535.
dc.subjectLow Octane Gasoline
dc.subjectPartially Premixed Combustion
dc.subjectSoot Particles
dc.titleIn-cylinder Combustion and Soot Evolution in the Transition from Conventional CI mode to PPC
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentComputational Reacting Flow Laboratory (CRFL)
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalEnergy & Fuels
dc.eprint.versionPost-print
kaust.personAn, Yanzhao
kaust.personJaasim, Mohammed
kaust.personRaman, Vallinayagam
kaust.personIm, Hong G.
kaust.personJohansson, Bengt
refterms.dateFOA2019-01-09T00:00:00Z
dc.date.published-online2018-01-27
dc.date.published-print2018-02-15


Files in this item

Thumbnail
Name:
acs.energyfuels.7b02535.pdf
Size:
2.256Mb
Format:
PDF
Description:
Accepted Manuscript

This item appears in the following Collection(s)

Show simple item record