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Thermal Stresses in Gas Turbine Exhaust Duct Expansion Joints FREE

[+] Author Affiliations
Michel D. Ninacs

Flexfab Niagara Inc., Montreal, Canada

Rodney P. Bell

Mu-Sigma Engineering Consultants, Mississauga, Canada

Paper No. 96-GT-398, pp. V005T14A043; 8 pages
doi:10.1115/96-GT-398
From:
  • ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General
  • Birmingham, UK, June 10–13, 1996
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7876-7
  • Copyright © 1996 by ASME

abstract

This paper discusses the methods used to derive an improved design for gas turbine exhaust duct expansion joints. Typically these joints are subjected to very rapid increase in internal exhaust gas temperatures that result in large temperature differentials within the joint structures. The thermal gradients can cause stress levels in excess of yield and when the turbine is used intermittently, such as peaking power units would be, the net result is crack propagation and gas leakage.

Copyright © 1996 by ASME
This article is only available in the PDF format.

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