Performance of Worn Labyrinth Seals PUBLIC ACCESS

[+] Author Affiliations
H. Zimmerman, A. Kammerer, K. H. Wolff

MTU Motoren- und Turbinen-Union München GmbH, Munich, Germany

Paper No. 94-GT-131, pp. V001T01A042; 9 pages
  • ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • The Hague, Netherlands, June 13–16, 1994
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7883-5
  • Copyright © 1994 by ASME


The major sealing device between rotating and static aeroengine parts is still of labyrinth type. Nowadays the fins and the stator may be coated and the running conditions very often cause heavy rubs which leads to severe surface imperfections.

This paper investigates the influence of rounded fins and worn coatings on the discharge coefficients of straight through labyrinth seals. The relevant effects of Reynolds number are investigated.

Some measured fin and coating surfaces from engine parts are presented. Experimental and numerical results show a strong effect of wear on labyrinth seal performance.

Copyright © 1994 by ASME
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