Sensitivity calculations on a soot model using a partially stirred reactor

dc.contributor.advisorRaman, Venkaten
dc.contributor.committeeMemberClemens, Noel T.en
dc.creatorWu, Nathan Gabrielen
dc.date.accessioned2010-11-05T19:49:45Zen
dc.date.available2010-11-05T19:49:45Zen
dc.date.available2010-11-05T19:49:54Zen
dc.date.issued2010-05en
dc.date.submittedMay 2010en
dc.date.updated2010-11-05T19:49:54Zen
dc.descriptiontexten
dc.description.abstractSensitivity analysis was performed on a soot model using a partially stirred reactor (PaSR) in order to determine the effects of mixing model parameters on soot scalar values. The sensitivities of the mixture fraction zeta and progress variable C to the mixing model constant C_phi were calculated; these values were used to compute the sensitivity of water mass fraction Y_H2O to C_phi and several soot quantities to soot moments. Results were validated by evaluating the mean mixture fraction sensitivity and a long simulation time case. From the baseline case, it was noted that soot moment sensitivities tended to peak on the rich side of the stoichiometric mixture fraction zeta_st. Timestep, number of notional particles, mixing timescale tau_mix, and residence time tau_res were varied independently. Choices for timestep and notional particle count were shown to be sufficient to capture relevant scalar profiles, and did not greatly affect sensitivity calculations. Altering tau_mix or tau_res was shown to affect sensitivity to mixing, and it was concluded that the soot model is more heavily influenced by the chemistry than mixing.en
dc.description.departmentAerospace Engineering
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2010-05-1472en
dc.language.isoengen
dc.subjectPartially stirred reactoren
dc.subjectSensitivity analysisen
dc.subjectSoot modelingen
dc.titleSensitivity calculations on a soot model using a partially stirred reactoren
dc.type.genrethesisen
thesis.degree.departmentAerospace Engineering and Engineering Mechanicsen
thesis.degree.disciplineAerospace Engineeringen
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Engineeringen
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