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dc.contributor.authorAmin, Hafiz
dc.contributor.authorBennett, Anthony
dc.contributor.authorRoberts, William L.
dc.date.accessioned2018-09-27T07:12:41Z
dc.date.available2018-09-27T07:12:41Z
dc.date.issued2018-09-12
dc.identifier.citationAmin HMF, Bennett A, Roberts WL (2018) Determining fractal properties of soot aggregates and primary particle size distribution in counterflow flames up to 10 atm. Proceedings of the Combustion Institute. Available: http://dx.doi.org/10.1016/j.proci.2018.07.057.
dc.identifier.issn1540-7489
dc.identifier.doi10.1016/j.proci.2018.07.057
dc.identifier.urihttp://hdl.handle.net/10754/628812
dc.description.abstractExperimental investigations of soot morphology are performed in counterflow flames of N-diluted ethylene and air, up to 10 atm. A thermophoretic sampling device is attached to a pressure vessel containing a counterflow burner where flames with an ethylene mole fraction of 0.3 are stabilized at 3, 5, and 6 atm. To allow measurements at higher pressures, the fuel mole fraction is lowered to 0.2 to reduce the soot loading and flames are studied at 5, 7, and 10 atm. Thermophoretic sampling of the soot zone is performed using TEM grids. The sampling process causes minimal flame disturbances. Soot collected on TEM grids is analyzed under transmission electron microscope (TEM). Primary particle size distributions are inferred at each pressure by manually analyzing the primary particles from TEM images. Fractal properties of soot at each pressure are also obtained by analyzing the TEM images at comparatively low magnifications. Mean primary particle diameter increases from 17.5 to 47.1 nm as the pressure is increased from 3 to 10 atm, whereas the fractal dimension and prefactor do not change with pressure up to 10 atm. For the flames studied here, fractal dimension lies between 1.61 and 1.67 whereas fractal prefactor varies between 1.68 and 1.86 without following any apparent trend with pressure.
dc.description.sponsorshipThis publication is based upon work supported by King Abdullah University of Science and Technology (KAUST). The authors would like to thank the Imaging and Characterization lab at KAUST for their assistance with the TEM analysis.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S1540748918304759
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Proceedings of the Combustion Institute. 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 Proceedings of the Combustion Institute, [, , (2018-09-11)] DOI: 10.1016/j.proci.2018.07.057. © 2018. 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.subjectPressurized counterflow flame
dc.subjectPrimary particle size
dc.subjectSoot morphology
dc.subjectThermophoretic sampling
dc.titleDetermining fractal properties of soot aggregates and primary particle size distribution in counterflow flames up to 10 atm
dc.typeArticle
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmenthigh-pressure combustion (HPC) Research Group
dc.identifier.journalProceedings of the Combustion Institute
dc.eprint.versionPost-print
kaust.personAmin, Hafiz
kaust.personBennett, Anthony
kaust.personRoberts, William L.
refterms.dateFOA2018-09-27T11:08:43Z
dc.date.published-online2018-09-12
dc.date.published-print2019


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