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dc.contributor.authorSterling, John Anthonyen_US
dc.date.accessioned2014-03-14T20:41:25Z
dc.date.available2014-03-14T20:41:25Z
dc.date.issued2009-06-22en_US
dc.identifier.otheretd-07132009-192300en_US
dc.identifier.urihttp://hdl.handle.net/10919/33996
dc.description.abstractRotordynamic instability is present in most or all automotive turbochargers. High subsynchronous amplitudes can cause a variety of problems in areas such as mechanical failures, emissions regulations and rotor design. Self-excited vibrations from sources of damping can lock in at lateral natural frequencies causing dangerously high vibration levels. The resulting high-amplitude conical and bending modes can be reduced in order to achieve a more robust system. This research focuses on the relationship between synchronous and subsynchronous amplitude levels. It is theorized that an increase in unbalance could cause a reduction in subsynchronous vibration amplitudes. Through the use of a custom turbocharger, a series of unbalances were applied to both the turbine and compressor wheels and the resulting amplitudes were recorded off a modified compressor nut. The resulting data were reduced and are presented at the end of this paper.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartetd2.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.subjectTurbochargeren_US
dc.subjectInstabilityen_US
dc.subjectSubsynchronousen_US
dc.subjectUnbalanceen_US
dc.titleInfluence of Induced Unbalance on Subsynchronous Vibrations of an Automotive Turbochargeren_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
dc.contributor.committeechairKirk, R. Gordonen_US
dc.contributor.committeememberKasarda, Mary E. F.en_US
dc.contributor.committeememberWicks, Alfred L.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07132009-192300/en_US
dc.date.sdate2009-07-13en_US
dc.date.rdate2009-07-30
dc.date.adate2009-07-30en_US


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