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Power Dissipation in Smooth and Honeycomb Labyrinth Seals PUBLIC ACCESS

[+] Author Affiliations
W. F. McGreehan

GE Aircraft Engines, Cincinnati, OH

S. H. Ko

Texas A&M University, College Station, TX

Paper No. 89-GT-220, pp. V001T01A088; 11 pages
doi:10.1115/89-GT-220
From:
  • ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Toronto, Ontario, Canada, June 4–8, 1989
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7913-9
  • Copyright © 1989 by ASME

abstract

The surface frictional characteristics of a labyrinth seal can result in significant windage power dissipation for high speed seals. Recent advances in seal design have produced high speed, high pressure labyrinth seals which operate at very low leakage rates. The reduced leakage is beneficial to gas turbine efficiency, but seal discharge temperatures can approach material design limits with high windage power dissipation. Also, a high air temperature rise can influence seal leakage flow. Consequently, the general assumption of negligible rotational effect on leakage is not always valid. A method is presented for the prediction of seal power dissipation and leakage flow over a wide range of design parameters. Results are compared to available test data and several approaches examined for the reduction of seal windage.

Copyright © 1989 by ASME
This article is only available in the PDF format.

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