Investigation of suction recirculation in rocket pump inducers

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dc.contributor.authorVan Sintern, Wolff H.en
dc.contributor.committeechairMoore, J.en
dc.contributor.committeememberDancey, Clinton L.en
dc.contributor.committeememberNg, Wing F.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:44:05Zen
dc.date.adate2008-08-29en
dc.date.available2014-03-14T21:44:05Zen
dc.date.issued1996en
dc.date.rdate2008-08-29en
dc.date.sdate2008-08-29en
dc.description.abstractRocket pump inducers are studied with a Navier-Stokes solver, the Moore Elliptic Flow Program, MEFP. Two redesigns of the Rocketdyne ADP inducer are performed. The first redesign changes the hub-tip ratio from 0.3 to 0.4. The second redesign influences the leading edge tip region. This part of the blade is rounded off in a meridional view, resulting in an increased sweep angle over the outer 30 percent of the blade height. Inlet recirculation and cavitation performance are the main concern of this thesis. The literature review focuses on these two areas and on previously performed inducer calculations. The calculation grid of the original design was altered for the two redesigns using a C-program. Then the new designs were investigated at three different flow rates: 110%, 100%, and 89%. Computational results were available at the same flow rates for the original design. The comparison of the results showed that the performed design changes did not significantly influence the recirculation performance. In fact for the redesign with the rounded-off leading edge the backflow increased. The cavitation performance showed some interesting changes. For both redesigns the minimum pressure was raised significantly. The case of the rounded-off leading edge showed an increase in minimum pressure at the leading edge and a decrease of minimum pressure over the rest of the leading edge height, thus resulting in probably better cavitation performance. A theory was presented that gives a possible explanation for the occurrence of inlet recirculation. The calculation results for the design changes of the Rocketdyne inducer are consistent with the theory, but the theory does not correctly predict the different recirculation performance of an SEP inducer.en
dc.description.degreeMaster of Scienceen
dc.format.extentxi, 102 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08292008-063509en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08292008-063509/en
dc.identifier.urihttp://hdl.handle.net/10919/44502en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1996.V367.pdfen
dc.relation.isformatofOCLC# 35950242en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectpumpsen
dc.subjectinduceren
dc.subjectComputational fluid dynamicsen
dc.subjectrecirculationen
dc.subjectcavitationen
dc.subject.lccLD5655.V855 1996.V367en
dc.titleInvestigation of suction recirculation in rocket pump inducersen
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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