Labyrinth Seal Flow Measurement by Tracer Gas Injection PUBLIC ACCESS

[+] Author Affiliations
William F. McGreehan, Fred G. Haaser, Laurence T. Sherwood

General Electric Company, Cincinnati, OH

Paper No. 87-GT-187, pp. V001T01A063; 6 pages
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 1: Turbomachinery
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7923-8
  • Copyright © 1987 by ASME


A practical system for flow measurement in rotating seals using the injection and sampling of a tracer gas is presented. Carbon dioxide or helium is injected as a tracer into a labyrinth seal at a controlled rate and gas samples are extracted downstream for concentration measurement. Test results from a rotating labyrinth seal rig were obtained over a range of seal pressure ratios and rotor speeds in order to determine the conditions which assure optimum tracer gas mixing. Seal leakage rates calculated by tracer gas concentration are compared to venturi flow measurements.

Copyright © 1987 by ASME
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