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Analysis of Heat Flux Distribution during Brush Seal Rubbing Using CFD with Porous Media Approach

Hildebrandt, Manuel; Schwitzke, Corina; Bauer, Hans-Jörg

Abstract (englisch):
This paper discusses the question of heat flux distribution between bristle package and rotor during a rubbing event. A three-dimensional Computational Fluid Dynamics (3D CFD) model of the brush seal test rig installed at the Institute of Thermal Turbomachinery (ITS) was created. The bristle package is modelled as a porous medium with local non-thermal equilibrium. The model is used to numerically recalculate experimentally conducted rub tests on the ITS test rig. The experimentally determined total frictional power loss serves as an input parameter to the numerical calculation. By means of statistical evaluation methods, the ma in influences on the heat flux distribution and the maximum temperature in the frictional contact are determined. The heat conductivity of the rotor material, the heat transfer coefficients at the bristles and the rubbing surface were identified as the dominant factors.

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Verlagsausgabe §
DOI: 10.5445/IR/1000131037
Veröffentlicht am 31.03.2021
Originalveröffentlichung
DOI: 10.3390/en14071888
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Strömungsmaschinen (ITS)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 29.03.2021
Sprache Englisch
Identifikator ISSN: 1996-1073
KITopen-ID: 1000131037
Erschienen in Energies
Verlag MDPI
Band 14
Heft 7
Seiten Art.-Nr.: 1888
Bemerkung zur Veröffentlichung This article belongs to the Special Issue Secondary Air Systems in Gas Turbines
Schlagwörter brush seal; rubbing; heat flux distribution; porous media; CFD
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