Brush seal temperature distribution analysis (Conference Paper)

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dc.contributor.authorDoğu, Yahya
dc.contributor.authorAksit, Mahmut F.
dc.date.accessioned2020-06-25T15:13:28Z
dc.date.available2020-06-25T15:13:28Z
dc.date.issued2005
dc.departmentKırıkkale Üniversitesi
dc.descriptionASME International Gas Turbine Institute
dc.descriptionASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future -- 6 June 2005 through 9 June 2005 -- Reno-Tahoe, NV -- 66048
dc.description.abstractBrush seals are designed to survive transient rotor rubs. Inherent brush seal flexibility reduces frictional heat generation. However, high surface speeds combined with thin rotor sections may result in local hot spots. Considering large surface area and accelerated oxidation rates, frictional heat at bristles tips is another major concern especially in challenging high temperature applications. This study investigates temperature distribution in a brush seal as a function of frictional heat generation at bristle tips. The two-dimensional axisymmetric CFD analysis includes the permeable bristle pack as a porous medium allowing fluid flow throughout the bristle matrix. In addition to effective flow resistance coefficients, isotropic effective thermal conductivity as a function of temperature is defined for the bristle pack. Employing a fin approach for a single bristle, a theoretical analysis has been developed after outlining the brush seal heat transfer mechanism. Theoretical and CFD analysis results are compared. To ensure coverage for various seal designs and operating conditions, several frictional heat input cases corresponding to different seal stiffness have been studied. Frictional heat generation is outlined to introduce a practical heat flux input into the analysis model. Effect of seal stiffness on nominal bristle tip temperature has been evaluated. Analyses show a steep temperature rise close to bristle tips that diminishes further away. Heat flux conducted through the bristles dissipates into the flow by a strong convection at fence height region. Copyright © 2005 by ASME.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1115/GT2005-69120
dc.identifier.endpage1248en_US
dc.identifier.scopus2-s2.0-33746146402
dc.identifier.scopusqualityQ2
dc.identifier.startpage1237en_US
dc.identifier.urihttps://doi.org/10.1115/GT2005-69120
dc.identifier.urihttps://hdl.handle.net/20.500.12587/1809
dc.identifier.volume3 PART Ben_US
dc.indekslendigikaynakScopus
dc.language.isoen
dc.relation.ispartofProceedings of the ASME Turbo Expo
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBrush sealen_US
dc.subjectCFDen_US
dc.subjectHeat generationen_US
dc.subjectHeat transferen_US
dc.titleBrush seal temperature distribution analysis (Conference Paper)en_US
dc.typeConference Object

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