The effect of blade solidity on the aerodynamic loss of a transonic turbine cascade

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dc.contributor.authorDoughty, Roger L.en
dc.contributor.committeechairMoses, Hal L.en
dc.contributor.committeememberDancey, Clinton L.en
dc.contributor.committeememberBrown, Eugene F.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:42:40Zen
dc.date.adate2009-08-14en
dc.date.available2014-03-14T21:42:40Zen
dc.date.issued1991-04-05en
dc.date.rdate2009-08-14en
dc.date.sdate2009-08-14en
dc.description.abstractPast research at Virginia Tech (VPI) explored the aerodynamic loss of the transonic VPI turbine blade, which 1s based on the pitchline profile of a high pressure turbine blade for a large commercial aircraft gas turbine. The current experiment explores the loss of the VPI blade for different axial solidity ratios near the design point. Ten percent changes in the solidity ratio were accomplished by varying the blade pitch and changing the blade stagger to maintain a constant throat to spacing ratio. Reaction, exit angle and exit Mach number were kept constant with this method. Cascades with three different solidities were tested in VPI’s transonic blowdown wind tunnel. Downstream total pressure loss and static pressure measurements were obtained. In addition, inviscid calculations were made for each case. Static pressure contours and Mach number profiles from the calculations were compared with the experimental results. A ten percent decrease in solidity caused no cascade loss penalty as compared to the Baseline solidity for a wide range of Mach numbers. Calculated blade Mach number profiles agreed well with experimental profiles except on the suction side near the throat and downstream of the shock/boundary layer interaction. Predicted downstream static pressure values agreed well with experimental values, except that the inviscid code tended to over-predict the pressure rise across the suction side shocks.en
dc.description.degreeMaster of Scienceen
dc.format.extentxv, 161 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08142009-040355en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08142009-040355/en
dc.identifier.urihttp://hdl.handle.net/10919/44221en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1991.D684.pdfen
dc.relation.isformatofOCLC# 23991369en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1991.D684en
dc.subject.lcshTurbines -- Blades -- Researchen
dc.titleThe effect of blade solidity on the aerodynamic loss of a transonic turbine cascadeen
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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