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dc.contributor.advisorStrzelec, Andrea
dc.creatorWhite, Jessica
dc.date.accessioned2015-04-28T15:37:34Z
dc.date.available2015-04-28T15:37:34Z
dc.date.created2014-12
dc.date.issued2014-12-12
dc.date.submittedDecember 2014
dc.identifier.urihttp://hdl.handle.net/1969.1/154182
dc.description.abstractThis work investigates the filtration efficiency of uncoated, commercial Diesel Particulate Filter (DPF) substrates of three porosities (55.8%, 61.1%, 65.0%) for particulate sizes representative of Gasoline Direct Injection (GDI) exhaust, and also refines a model suitable for predicting filtration efficiency for these non-loaded particulate traps. GDI produces lower concentrations of smaller particulates as compared to diesel combustion, which results in the absence of a soot-cake and yields changes in filtration behavior compared to diesel particulate. To produce a model that simulates the filtration efficiency of non-loaded particulate traps, an existing flow field model of DPF filtration was modified to better capture the fundamental physics of deep-bed filtration. The improved model includes additional sedimentation and thermophoretic modes of filtration and the soot-cake related filtration approximations were removed. Size-dependent particulate concentrations were measured using a Scanning Mobility Particle Sizer (SMPS), both upstream and downstream of the filters. By comparing upstream and downstream particle number concentrations, the particle size-dependent filtration efficiency of filter samples was determined. Experimental results were compared to model predictions, and showed excellent agreement.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.subjectFiltration
dc.subjectParticulate
dc.titleSize-Dependent Filtration of Non-Loaded Particulate Traps
dc.typeThesis
thesis.degree.departmentMechanical Engineering
thesis.degree.disciplineMechanical Engineering
thesis.degree.grantorTexas A & M University
thesis.degree.nameMaster of Science
thesis.degree.levelMasters
dc.contributor.committeeMemberMalak, Richard
dc.contributor.committeeMemberWilhite, Benjamin
dc.type.materialtext
dc.date.updated2015-04-28T15:37:34Z
local.etdauthor.orcid0000-0001-9085-7769


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