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Performance Evaluation of Gas Turbine Labyrinth Seals Using Computational Fluid Dynamics

[+] Author Affiliations
Bambang I. Soemarwoto, Johan C. Kok, Koen M. J. de Cock, Arjen B. Kloosterman, Gerrit A. Kool

National Aerospace Laboratory NLR, Amsterdam, The Netherlands

Joris F. A. Versluis

Sulzer Metco Turbine Components, Lomm, The Netherlands

Paper No. GT2007-27905, pp. 1207-1217; 11 pages
doi:10.1115/GT2007-27905
From:
  • ASME Turbo Expo 2007: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2007, Parts A and B
  • Montreal, Canada, May 14–17, 2007
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4793-4 | eISBN: 0-7918-3796-3
  • Copyright © 2007 by ASME

abstract

The paper presents an investigation on the characteristics of flow through labyrinth seals. The focus of the paper lies in the application of the Computational Fluid Dynamics (CFD) methodology. The Reynolds-Averaged Navier-Stokes equations are employed as the flow governing equations. Turbulence is incorporated through a variant of the two-equation k-ω turbulence model. Three test cases are considered. The first test case concerns a labyrinth seal configuration with a honeycomb land. The computational results are compared to those obtained from seal test rig measurements. The second test case addresses the same labyrinth seal where the honeycomb land is replaced by a solid smooth land. The third test case addresses the flow through a labyrinth seal with canted knives. The CFD method is considered as an analysis tool complementary to rig-testing and enables investigating the effect of new seal design features. Additionally CFD is seen as a tool to support the correct representation of test-data in semiempirical engineering models for seal design. An industrial perspective is presented towards the exploitation of these modeling capabilities for real-life design of seals.

Copyright © 2007 by ASME

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