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dc.contributor.authorThompson, Elizabeth Danielleen_US
dc.date.accessioned2014-03-14T20:35:32Z
dc.date.available2014-03-14T20:35:32Z
dc.date.issued2009-04-28en_US
dc.identifier.otheretd-05072009-104919en_US
dc.identifier.urihttp://hdl.handle.net/10919/32328
dc.description.abstractLabyrinth seal force estimates are important to the prediction of the stability of turbomachinery. The force prediction methods fall into several categories: experiments, bulk flow analysis, and finite volume analysis. Finite volume analysis can be split into two subcategories: self-developed and commercial. In this research, a commercial computational fluid dynamics (CFD) program called ANSYS-CFX was used to predict the forces generated in a labyrinth seal whirling at specified speeds. The results were compared to data from VT-FAST, a bulk flow code, and TASCflow, another commercial CFD program. It was shown that there were discrepancies among the results, and several hypotheses were made as to the reason for these discrepancies. Additionally, ANSYS-CFX was used to study the effect of labyrinth seal eccentricity ratio on the resultant force generated. It was shown that the radial force component within the seal behaved linearly with respect to eccentricity ratio. However, the tangential force component had no distinguishable relationship with the eccentricity ratio. It was hypothesized that the lack of a relationship was caused by the small fluctuations in the inlet swirl. Although the inlet swirl varied very little at each eccentricity ratio, it was shown there was a relationship between the tangential force and inlet swirl.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartBetsyThompson_Thesis-Final_r1.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.subjectEccentricity Studyen_US
dc.subjectANSYS-CFXen_US
dc.subjectWhirl Speed Studyen_US
dc.subjectLabyrinth Sealen_US
dc.titleStudy of Forces and Dynamic Coefficients in Whirling and Eccentric Labyrinth Seals Using ANSYS-CFXen_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.committeechairKirk, R. Gordonen_US
dc.contributor.committeememberWest, Robert L. Jr.en_US
dc.contributor.committeememberKasarda, Mary E. F.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05072009-104919/en_US
dc.date.sdate2009-05-07en_US
dc.date.rdate2009-05-27
dc.date.adate2009-05-27en_US


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