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Experimental Testing of Carbon Brush Seals for Aero Engines Bearing Chambers

[+] Author Affiliations
Bilal Outirba, Patrick Hendrick

Université Libre de Bruxelles, Brussels, Belgium

Paper No. GT2014-25684, pp. V05CT16A017; 11 pages
doi:10.1115/GT2014-25684
From:
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 5C: Heat Transfer
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4573-8
  • Copyright © 2014 by ASME

abstract

This paper provides the first step in sizing carbon brush seals for aero-engine oil bearing chambers applications.

Recent developments in the aeronautic domain focus strongly on the reduction of aero-engine specific oil consumption. For instance, optimizing the civil aircraft gas turbine engine lubrication oil system is considered as one of the main targets in this research. Specifically, brush seals have shown tremendous leakage performance in sealing secondary flows compared to classic labyrinth seals over the last few decades. Therefore, an attractive idea is to extent their utilization to oil bearing chamber applications.

To perform the experimental part of the study, a test rig has recently been built at ULB. This test rig will be described in this paper. A parametrical study has been performed in stationary conditions, and at very low rotation speed. A particular attention was given to the air consumption and the torque friction losses. Finally, a test simulating the effects of a rotor excursion on the brush seal performance has been made.

Copyright © 2014 by ASME

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