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Entrance and exit region friction factor models for annular seal analysis
dc.contributor.advisor | Childs, Dara | |
dc.contributor.advisor | Nelson, Clayton | |
dc.creator | Elrod, David Alan | |
dc.date.accessioned | 2020-09-02T21:11:27Z | |
dc.date.available | 2020-09-02T21:11:27Z | |
dc.date.issued | 1988 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/DISSERTATIONS-783749 | |
dc.description | Typescript (photocopy). | en |
dc.description.abstract | The Mach number definition and boundary conditions in Nelson's nominally-centered, annular gas seal analysis are revised. A method is described for determining the wall shear stress characteristics of an annular gas seal experimentally. Two friction factor models are developed for annular seal analysis: one model is based on flat-plate flow theory; the other uses empirical entrance and exit region friction factors. The friction factor predictions of the models are compared to experimental results. Each friction model is used in an annular gas seal analysis. The seal characteristics predicted by the two seal analyses are compared to experimental results and to the predictions of Nelson's analysis. The comparisons are for smooth-rotor seals with smooth- and honeycomb-stators. The comparisons show that the analysis which uses empirical entrance and exit region shear stress models predicts the static and stability characteristics of annular gas seals better than the other analyses. The analyses predict direct stiffness poorly. | en |
dc.format.extent | xi, 70 leaves | en |
dc.format.medium | electronic | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | |
dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | Major mechanical engineering | en |
dc.subject.classification | 1988 Dissertation E48 | |
dc.subject.lcsh | Rotors | en |
dc.subject.lcsh | Dynamics | en |
dc.subject.lcsh | Rotors | en |
dc.subject.lcsh | Vibration | en |
dc.subject.lcsh | Turbomachines | en |
dc.subject.lcsh | Vibration | en |
dc.title | Entrance and exit region friction factor models for annular seal analysis | en |
dc.type | Thesis | en |
thesis.degree.grantor | Texas A&M University | en |
thesis.degree.name | Doctor of Philosophy | en |
thesis.degree.name | Ph. D | en |
dc.contributor.committeeMember | Darby, Ron | |
dc.contributor.committeeMember | Morrison, Gerald | |
dc.type.genre | dissertations | en |
dc.type.material | text | en |
dc.format.digitalOrigin | reformatted digital | en |
dc.publisher.digital | Texas A&M University. Libraries | |
dc.identifier.oclc | 20067649 |
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