Show simple item record

dc.contributor.authorNunes, Bonaventure Ren_US
dc.date.accessioned2015-04-22T06:00:08Z
dc.date.available2015-04-22T06:00:08Z
dc.date.issued2013-10-24en_US
dc.identifier.othervt_gsexam:1654en_US
dc.identifier.urihttp://hdl.handle.net/10919/51742
dc.description.abstractSteam turbines are widely used in various industrial applications, primarily for power extraction. However, deviation for operating design conditions is a frequent occurrence for such machines, and therefore, understanding their performance at off design conditions is critical to ensure that the needs of the power demanding systems are met as well as ensuring safe operation of the steam turbines. In this thesis, the aerodynamic performance of three different turbine airfoil sections ( baseline, mid radius and tip profile) as a function of angle of incidence and exit Mach numbers, is numerically computed at 0.3 axial chords downstream of the trailing edge. It was found that the average loss coefficient was low, owing to the fact that the flow over the airfoils was well behaved. The loss coefficient also showed a slight decrease with exit Mach number for all three profiles. The mid radius and tip profiles showed near identical performance due to similarity in their geometries. It was also found out that the baseline profile showed a trend of substantial increase in losses at positive incidences, due to the development of an adverse pressure zone on the blade suction side surface. The mid radius profile showed high insensitivity to angle of incidence as well as low exit flow angle deviation in comparison to the baseline blade.en_US
dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.rightsThis Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s).en_US
dc.subjectSteamen_US
dc.subjectTurbinesen_US
dc.subjectTransonic Cascadeen_US
dc.subjectAerodynamicsen_US
dc.subjectPressure Lossen_US
dc.subjectComputational Fluid Dynamics (CFD)en_US
dc.subjectAnsys CFXen_US
dc.titleNumerical Loss Prediction of high Pressure Steam Turbine airfoilsen_US
dc.typeThesisen_US
dc.contributor.departmentAerospace and Ocean Engineeringen_US
dc.description.degreeMSen_US
thesis.degree.nameMSen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineAerospace Engineeringen_US
dc.contributor.committeechairEkkad, Srinathen_US
dc.contributor.committeechairNg, Wing Faien_US
dc.contributor.committeememberMa, Linen_US
dc.contributor.committeememberLowe, Kevin Ten_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record