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dc.contributor.authorLuong, Minh Bau
dc.contributor.authorDesai, Swapnil
dc.contributor.authorPérez, Francisco E. Hernández
dc.contributor.authorSankaran, Ramanan
dc.contributor.authorJohansson, Bengt
dc.contributor.authorIm, Hong G.
dc.date.accessioned2020-07-29T07:44:13Z
dc.date.available2020-07-29T07:44:13Z
dc.date.issued2020-07-27
dc.date.submitted2019-11-07
dc.identifier.citationLuong, M. B., Desai, S., Pérez, F. E. H., Sankaran, R., Johansson, B., & Im, H. G. (2020). A statistical analysis of developing knock intensity in a mixture with temperature inhomogeneities. Proceedings of the Combustion Institute. doi:10.1016/j.proci.2020.05.044
dc.identifier.issn1540-7489
dc.identifier.doi10.1016/j.proci.2020.05.044
dc.identifier.urihttp://hdl.handle.net/10754/664485
dc.description.abstractKnock formation and its intensity for a stoichiometric ethanol/air mixture under a representative endgas auto-ignition condition in IC engines with temperature inhomogeneities are investigated using multidimensional direct numerical simulations (DNS) with a 40-species skeletal mechanism of ethanol. Two- and three-dimensional simulations are performed by systematically varying temperature fluctuations and its most energetic length scale, lT. The volumetric fraction of the mixture regions that have the propensity to detonation development, FD, is proposed as a metric to predict the amplitude of knock intensity.It isfound that with increasing lT, FD shows a good agreement with the heat release fraction of the mixture regions with pressure greater than equilibrium pressure, FH. The detonation peninsula is well captured by FD and FH when plotting them as a function of the volume-averaged ξ , ξ, (ξ = a/Ssp is the ratio of the acoustic speed, a to the ignition front speed, Ssp). Decreasing lT is found to significantly reduce the super-knock intensity. The results suggest that decreasing lT, as in engines with tumble desig
dc.description.sponsorshipThis work was sponsored by King Abdullah University of Science and Technology and used the resources of the KAUST Supercomputing Laboratory.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S1540748920300924
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, [, , (2020-07-27)] DOI: 10.1016/j.proci.2020.05.044 . © 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.titleA statistical analysis of developing knock intensity in a mixture with temperature inhomogeneities
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentMechanical Engineering Program
dc.identifier.journalProceedings of the Combustion Institute
dc.rights.embargodate2022-07-27
dc.eprint.versionPost-print
dc.contributor.institutionBredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee, Knoxville, TN 37996-3394, USA.
dc.contributor.institutionComputational Sciences and Engineering, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
kaust.personLuong, Minh Bau
kaust.personPérez, Francisco E. Hernández
kaust.personJohansson, Bengt
kaust.personIm, Hong G.
dc.date.accepted2020-05-27
kaust.acknowledged.supportUnitKAUST Supercomputing Laboratory
kaust.acknowledged.supportUnitSupercomputing Laboratory.


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