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Rim Sealing of Rotor-Stator Wheelspaces in the Absence of External Flow PUBLIC ACCESS

[+] Author Affiliations
J. W. Chew, S. Dadkhah, A. B. Turner

University of Sussex, Falmer, Brighton, UK

Paper No. 91-GT-033, pp. V001T01A012; 7 pages
doi:10.1115/91-GT-033
From:
  • ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Orlando, Florida, USA, June 3–6, 1991
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7898-9
  • Copyright © 1991 by ASME

abstract

Sealing of the cavity formed between a rotating disc and a stator in the absence of a forced external flow is considered. In these circumstances the pumping action of the rotating disc may draw fluid into the cavity through the rim seal. Minimum cavity throughflow rates required to prevent such ingress are estimated experimentally and from a mathematical model. The results are compared with other workers’ measurements. Measurements for three different types of rim seal are reported for a range of seal clearances and for rotational Reynolds numbers up to 3 × 106. The mathematical model is found to correlate the experimental data reasonably well.

Copyright © 1991 by ASME
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