Adiabatic and overall effectiveness in the showerhead of a film cooled turbine vane and effects of surface curvature on adiabatic effectiveness

dc.contributor.advisorBogard, David G.en
dc.contributor.committeeMemberda Silva, Alexandreen
dc.creatorNathan, Marc Louisen
dc.date.accessioned2012-02-08T22:03:57Zen
dc.date.accessioned2017-05-11T22:24:15Z
dc.date.available2012-02-08T22:03:57Zen
dc.date.available2017-05-11T22:24:15Z
dc.date.issued2011-12en
dc.date.submittedDecember 2011en
dc.date.updated2012-02-08T22:04:20Zen
dc.descriptiontexten
dc.description.abstractTwo sets of experiments were performed on a simulated turbine nozzle guide vane. First, adiabatic and overall effectiveness measurements were taken in the showerhead region of the vane using adiabatic and matched Biot vane models, respectively. Measurements of overall effectiveness in the showerhead region are not found in the literature, and are a useful baseline for validating the results of computational fluid dynamics (CFD) simulations. Overall effectiveness is useful because it shows the results of combining film cooling, internal convection, and surface conduction to provide a more complete picture of vane cooling than adiabatic effectiveness. An impingement plate was utilized to generate internal jet cooling. Momentum flux ratios were matched between the models and ranged from I*SH = 0.76 to 6.70, based on showerhead upstream approach velocity. The second set of experiments used a different model to examine the effects of surface curvature on adiabatic effectiveness. Results in open literature are found by varying the radius of curvature of a fixed setup, so the current approach was novel in that it looked at adiabatic effectiveness at locations of various curvature around the same vane. Blowing ratios from M = 0.4 to M = 1.6 were tested at a density ratio of DR = 1.20 for two locations on the suction side of the vane. Results were presented in terms of laterally averaged adiabatic effectiveness and contour plots of adiabatic effectiveness, and were compared to literature.en
dc.description.departmentMechanical Engineeringen
dc.format.mimetypeapplication/pdfen
dc.identifier.slug2152/ETD-UT-2011-12-4867en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2011-12-4867en
dc.language.isoengen
dc.subjectFilm coolingen
dc.subjectConjugate heat transferen
dc.subjectAdiabatic effectivenessen
dc.subjectOverall effectivenessen
dc.subjectShowerheaden
dc.subjectSurface curvatureen
dc.titleAdiabatic and overall effectiveness in the showerhead of a film cooled turbine vane and effects of surface curvature on adiabatic effectivenessen
dc.type.genrethesisen

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