Calibration and implementation of a functional global auto-ignition model

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dc.contributor.advisorPerumal, Marlanen_ZA
dc.contributor.authorWinstanly, Andrewen_ZA
dc.date.accessioned2014-11-05T03:50:27Z
dc.date.available2014-11-05T03:50:27Z
dc.date.issued2014en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThis research is based on a functional global reaction-rate-based auto-ignition model (FGAM) developed at the Sasol Advanced Fuels Laboratory (SAFL). During the development of the model, its performance had been validated against a detailed kinetic auto-ignition mechanism in regions of lean to stoichiometric air-fuel ratio for n-heptane, iso-octane, 1-hexene, toluene, methanol and a quaternary gasoline surrogate blend of iso-octane, toluene, nheptane and n-hexane. Subsequent to the publication of the model, sets of reaction coefficients for PRF (Primary Reference Fuel) and TSF (Toluene Standardisation Fuel) blends had been developed and published. In its original form, however, the model could not be implemented in typical engine and chemical kinetic model simulation software. In this work, an investigation was made into the form and stiffness limitations of the FGAM which prevented implementation into standard engine and chemical kinetic codes. Changes made to the form of the model that allowed implementation into these codes without significantly altering the behavioural functions of the model were investigated. Subsequent to the investigation, a modification was introduced to the FGAM in the form of a second pseudo-QSSA (quasi-steady-state assumption) which eliminated the need for calculation of the transient concentration of one of the model species. The resulting reduction in numerical stiffness allowed for the revised model to be implemented as a descriptor for combustions kinetics in engine simulations in GT-Suite.en_ZA
dc.identifier.apacitationWinstanly, A. (2014). <i>Calibration and implementation of a functional global auto-ignition model</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/9134en_ZA
dc.identifier.chicagocitationWinstanly, Andrew. <i>"Calibration and implementation of a functional global auto-ignition model."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 2014. http://hdl.handle.net/11427/9134en_ZA
dc.identifier.citationWinstanly, A. 2014. Calibration and implementation of a functional global auto-ignition model. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Winstanly, Andrew AB - This research is based on a functional global reaction-rate-based auto-ignition model (FGAM) developed at the Sasol Advanced Fuels Laboratory (SAFL). During the development of the model, its performance had been validated against a detailed kinetic auto-ignition mechanism in regions of lean to stoichiometric air-fuel ratio for n-heptane, iso-octane, 1-hexene, toluene, methanol and a quaternary gasoline surrogate blend of iso-octane, toluene, nheptane and n-hexane. Subsequent to the publication of the model, sets of reaction coefficients for PRF (Primary Reference Fuel) and TSF (Toluene Standardisation Fuel) blends had been developed and published. In its original form, however, the model could not be implemented in typical engine and chemical kinetic model simulation software. In this work, an investigation was made into the form and stiffness limitations of the FGAM which prevented implementation into standard engine and chemical kinetic codes. Changes made to the form of the model that allowed implementation into these codes without significantly altering the behavioural functions of the model were investigated. Subsequent to the investigation, a modification was introduced to the FGAM in the form of a second pseudo-QSSA (quasi-steady-state assumption) which eliminated the need for calculation of the transient concentration of one of the model species. The resulting reduction in numerical stiffness allowed for the revised model to be implemented as a descriptor for combustions kinetics in engine simulations in GT-Suite. DA - 2014 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2014 T1 - Calibration and implementation of a functional global auto-ignition model TI - Calibration and implementation of a functional global auto-ignition model UR - http://hdl.handle.net/11427/9134 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/9134
dc.identifier.vancouvercitationWinstanly A. Calibration and implementation of a functional global auto-ignition model. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 2014 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9134en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Mechanical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.titleCalibration and implementation of a functional global auto-ignition modelen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScEngen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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