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A Design to Increase the Static Stiffness of Hole Pattern Stator Gas Seals

[+] Author Affiliations
Dara W. Childs, Yoon-Shik Shin

Texas A&M University, College Station, TX

John Wade

Capstone Turbine

Paper No. GT2006-90778, pp. 1279-1284; 6 pages
doi:10.1115/GT2006-90778
From:
  • ASME Turbo Expo 2006: Power for Land, Sea, and Air
  • Volume 5: Marine; Microturbines and Small Turbomachinery; Oil and Gas Applications; Structures and Dynamics, Parts A and B
  • Barcelona, Spain, May 8–11, 2006
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4240-1 | eISBN: 0-7918-3774-2
  • Copyright © 2006 by ASME

abstract

An analysis is presented which shows that a deep groove located at about 60% along the axial length from the inlet will approximately double the static stiffness of a hole-pattern-stator, annular gas seal. Test results for a seal using this geometry generally confirm the correctness of this prediction. The groove also produces an increase in leakage by about 4% and a modest decrease in effective damping.

Copyright © 2006 by ASME
Topics: Design , Stators , Stiffness

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