CFD analysis and redesign of centrifugal impeller flows for rocket pumps

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dc.contributor.authorLupi, Alessandroen
dc.contributor.committeememberMoore, Johnen
dc.contributor.committeememberDancey, Clinton L.en
dc.contributor.committeememberBrown, Eugene F.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:39:17Zen
dc.date.adate2009-06-30en
dc.date.available2014-03-14T21:39:17Zen
dc.date.issued1993-12-05en
dc.date.rdate2009-06-30en
dc.date.sdate2009-06-30en
dc.description.abstractThe analysis and redesign of a centrifugal impeller for a rocket pump is presented in this thesis. A baseline impeller was designed by Rocketdyne for the NASA Marshall Pump Consortium. Initially, the objective was to reduce the circumferential exit flow distortion of the baseline impeller. Later in the study, the objective became raising the head coefficient of the impeller. The study presented in this thesis was also undertaken to demonstrate current CFD capabilities for impeller design. A literature review includes an overview of centrifugal impeller geometries and configurations. Centrifugal impeller performance and secondary flows are discussed, and a summary of studies on the effects of impeller exit and diffuser inlet velocity distortion on diffuser performance is also presented. The flow calculation details and the results of the baseline impeller flow calculations are described. Fourteen redesigned impeller geometries were analyzed using the Moore Elliptic Flow Program, and the results were compared to the baseline geometry in terms of head rise, losses, and exit flow distortions. A final geometry was chosen; this geometry will be built and tested by Rocketdyne. The results show that backward blade lean can be effective in red using the exit flow distortion of the impeller. Tip slots or holes were not beneficial because of the large inlet boundary layer. Also, it appears possible to raise the head coefficient of the baseline impeller without creating excessive flow distortion. The planned testing is necessary to verify the predictions of the flow code.en
dc.description.degreeMaster of Scienceen
dc.format.extentxiv, 123 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06302009-040325en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06302009-040325/en
dc.identifier.urihttp://hdl.handle.net/10919/43488en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1993.L875.pdfen
dc.relation.isformatofOCLC# 30315651en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1993.L875en
dc.subject.lcshCentrifugal pumpsen
dc.subject.lcshImpellersen
dc.subject.lcshRocket engines -- Fuel systemsen
dc.titleCFD analysis and redesign of centrifugal impeller flows for rocket pumpsen
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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