An Investigation of Effectiveness of Normal and Angled Slot Film Cooling in a Transonic Wind Tunnel

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dc.contributor.authorHatchett, John Henryen
dc.contributor.committeechairNg, Wing Faien
dc.contributor.committeecochairThole, Karen A.en
dc.contributor.committeememberDiller, Thomas E.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:32:06Zen
dc.date.adate2008-03-04en
dc.date.available2014-03-14T20:32:06Zen
dc.date.issued2008-02-22en
dc.date.rdate2008-03-04en
dc.date.sdate2008-02-23en
dc.description.abstractAn experimental and numerical investigation was conducted to determine the film cooling effectiveness of a normal slot and angled slot under realistic engine Mach number conditions. Freestream Mach numbers of 0.65 and 1.3 were tested. For the normal slot, hot gas ingestion into the slot was observed at low blowing ratios (M < 0.25). At high blowing ratios (M > 0.6) the cooling film was observed to "lift off" from the surface. For the 30o angled slot, the data was found to collapse using the blowing ratio as a scaling parameter (x/Ms). Results from the current experiment were compared with the subsonic data published to confirm this test procedure. For the angled slot, at the supersonic freestream Mach number, the current experiment shows that at the same x/Ms, the film cooling effectiveness increases by as much as 25% as compared to the subsonic case. The results of the experiment also show that at the same x/Ms, the film cooling effectiveness of the angled slot is considerably higher than that of the normal slot, at both subsonic and supersonic Mach numbers. The flow physics for the slot tests considered here are also described with computational fluid dynamic (CFD) simulations in the subsonic and supersonic regimes.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-02232008-152904en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02232008-152904/en
dc.identifier.urihttp://hdl.handle.net/10919/31324en
dc.publisherVirginia Techen
dc.relation.haspartHatchett_Thesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectfilm coolingen
dc.subjecttransonic turbineen
dc.subjectnormal and angled slotsen
dc.titleAn Investigation of Effectiveness of Normal and Angled Slot Film Cooling in a Transonic Wind Tunnelen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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