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Modeling of Heat Transfer and Clearance Changes in Transient Performance Calculations: A Comparison

[+] Author Affiliations
Rasmus S. Merkler, Stephan Staudacher

University of Stuttgart, Stuttgart, Germany

Paper No. GT2006-90041, pp. 37-45; 9 pages
  • ASME Turbo Expo 2006: Power for Land, Sea, and Air
  • Volume 2: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Environmental and Regulatory Affairs
  • Barcelona, Spain, May 8–11, 2006
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4237-1 | eISBN: 0-7918-3774-2
  • Copyright © 2006 by ASME


This paper provides an overview of the models used in transient performance calculations relative to heat exchange between the fluid flows and the material as well as clearance changes due to centifugal forces and thermal loads. It entails a summary of the three basic modeling approaches recorded in literature noting their advantages and disadvantages. The most important criterions for the assesment of these modeling methods for their use in performance calculation programs is derived. The different modeling methods are then assessed with the derived criterions. And finally, further investigations on the most appealing aproach for use in performance calculations are presented.

Copyright © 2006 by ASME



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