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Contamination of Brush Seals by Oil and Salt and Its Impact on Rubbing and Hysteresis Behaviour

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

Abstract (englisch):
The literature already contains some experimental, analytical and numerical investigations
on the rubbing and hysteresis behaviour of brush seals. What the investigations have in common
is that they were carried out with new and uncontaminated seals, or that such a condition was
assumed. The influence of contamination has not been explicitly investigated yet. Particularly in
stationary gas and steam turbines, foreign substances can accumulate on and in the bristle package
during steady-state operation. In the case of a rubbing event with a contaminated brush seal, e.g.,
during shutdown of the machine, the process is not expected to be comparable to that assumed
in the presence of a new, uncontaminated seal. The present paper is dedicated to the question of
the influence of contamination on the total frictional power loss generated during rubbing and the
distribution of heat fluxes in friction contact. For this purpose, rub tests with two seals were carried
out on the brush seal test rig of the Institute of Thermal Turbomachinery (ITS) in new conditions.
Subsequently, the sealing packages were contaminated with oil or a salt mixture. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000100820
Veröffentlicht am 12.12.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Strömungsmaschinen (ITS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2504-186X
KITopen-ID: 1000100820
Erschienen in International journal of turbomachinery, propulsion and power
Band 40
Heft 4
Externe Relationen Abstract/Volltext
Nachgewiesen in Scopus
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