Systematic Prediction and Parametric Characterization of Thermo-Acoustic Instabilities in Premixed Gas Turbine Combustors

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dc.contributor.authorMartin, Christopher Reeden
dc.contributor.committeecochairVandsburger, Urien
dc.contributor.committeecochairBaumann, William T.en
dc.contributor.committeememberWest, Robert L. Jr.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:30:24Zen
dc.date.adate2007-03-13en
dc.date.available2014-03-14T20:30:24Zen
dc.date.issued2006-09-29en
dc.date.rdate2008-03-13en
dc.date.sdate2007-01-10en
dc.description.abstractThis thesis describes the coincident prediction and observation of thermo-acoustic instabilities in a turbulent, swirl-stabilized research combustor using a stability model constructed from validated reduced-order component models. The component models included the acoustic response to flame heat release rate at various locations in the combustor, the turbulent diffusion of uneven fuel-air mixing, and the flame's response to perturbations in both inlet velocity and equivalence ratio. These elements are closed in a system-level model to reflect their natural dynamic coupling and assessed with linear stability criteria. The results include the empirical validation of each of the component models and limited validation of the total closed-loop model with a lean premixed gaseous fuel combustor not dissimilar to an industrial burner. The degree of agreement between the predictions and the measurements encourages the conclusion that the reduced-order technique described herein not only includes the relevant physics, but has characterized them with sufficient acuracy to be the basis for design techniques for the passive avoidance of thermo-acoustic instabilities.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-01102007-155849en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01102007-155849/en
dc.identifier.urihttp://hdl.handle.net/10919/30889en
dc.publisherVirginia Techen
dc.relation.haspartMartin_Masters.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectCombustoren
dc.subjectThermo-Acousticen
dc.subjectFlameen
dc.subjectInstabilityen
dc.subjectDynamicen
dc.titleSystematic Prediction and Parametric Characterization of Thermo-Acoustic Instabilities in Premixed Gas Turbine Combustorsen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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