The determination of pressure profiles in oil ring seals considering the influence of temperature gradients in the sealing fluid

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dc.contributor.authorReedy, Steven W.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:38:26Zen
dc.date.adate2010-06-12en
dc.date.available2014-03-14T21:38:26Zen
dc.date.issued1988en
dc.date.rdate2010-06-12en
dc.date.sdate2010-06-12en
dc.description.abstractThe analysis of ring type seals is of great concern for the designer of high speed and high pressure centrifugal compressors. Computers now play a major role in allowing for a quick evaluation of the floating ring seal. Since the accuracy of the rotor shaft stability evaluation depends on the validity of the dynamic seal characteristics, every step in the evaluation must be carefully scrutinized and updated to include the latest in theory and practical operating experience. This thesis presents the theory and results of one such extension to the current published analysis of oil ring seals. The new analysis includes the influence of the sealing fluid temperature gradients on the leakage flow rate and seal dynamic characteristics for multi-ring and/or multi-land ring configurations. Using classical short bearing theory but allowing for temperature and pressure dependent viscosity variations across the seal, the resulting pressure profiles have been determined numerically utilizing a finite difference solution technique. This thesis discusses the method used to calculate the flow and pressure profiles for oil seals, their influence on the seal dynamic characteristics, and the importance of their consideration on actual turbomachinery stability.en
dc.description.degreeMaster of Scienceen
dc.format.extentxii, 147 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06122010-020545en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06122010-020545/en
dc.identifier.urihttp://hdl.handle.net/10919/43281en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1988.R427.pdfen
dc.relation.isformatofOCLC# 19611336en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1988.R427en
dc.subject.lcshLubrication and lubricantsen
dc.titleThe determination of pressure profiles in oil ring seals considering the influence of temperature gradients in the sealing fluiden
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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