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dc.contributor.authorNord, Larsen_US
dc.date.accessioned2014-03-14T20:32:27Z
dc.date.available2014-03-14T20:32:27Z
dc.date.issued2001-02-21en_US
dc.identifier.otheretd-03102001-114618en_US
dc.identifier.urihttp://hdl.handle.net/10919/31437
dc.description.abstractPressure pulsations, or thermoacoustic instabilities, as they are called in the research community, can cause extensive damage in gas turbine combustion chambers. To understand the phenomena related to thermoacoustics, a simple Rijke-type tube combustor was built and studied. Extensive experimental results, as well as theoretical analyses related to the Rijke tube are presented in this thesis. The results, attributable to both the analyses and the experiments, help explain all the phenomena affecting the acoustic pressure in the combustor. The conclusion is that there are three separate yet related physical processes affecting the acoustic pressure in the tube. The three mechanisms are as follows: a main thermoacoustic instability in accordance to the Rayleigh Criterion; a vibrating flame instability where the flame sheet exhibits mode shapes; and a pulsating flame instability driven by heat losses to the flame stabilizer. All these instabilities affect the heat released to the gas in the combustor. The energy from the oscillating heat couples with the acoustics of the volume bounded by the tube structure. The experimental results in the study are important in order to obtain model parameters for prediction as well as for achieving control of the instabilities.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartthesis.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectflame instabilitiesen_US
dc.subjectcombustionen_US
dc.subjectchemiluminescenceen_US
dc.subjectacousticsen_US
dc.titleA Thermoacoustic Characterization of a Rijke-type Tube Combustoren_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMechanical Engineeringen_US
dc.contributor.committeechairSaunders, William R.en_US
dc.contributor.committeememberBurdisso, Ricardo A.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03102001-114618/en_US
dc.contributor.committeecochairVandsburger, Urien_US
dc.date.sdate2001-03-10en_US
dc.date.rdate2002-03-12
dc.date.adate2001-03-12en_US


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