Failure analysis in after shell section of gas turbine combustion liner under base-load operation

Kyung Min Kim, Namgeon Yun, Yun Heung Jeon, Dong Hyun Lee, Hyung Hee Cho

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The present study investigates the failure analysis and the lifetime prediction in the after shell section of gas turbine combustion liner with internal cooling passages called C-channel. To calculate distributions of temperature and stresses, 3D-numerical simulations using FVM and FEM commercial codes are performed. As a result, the discrepancy in thermal expansion between hot and coolant side walls induces high thermal stresses in the welding region and above the divider of the C-channel. Thus, these two regions are much weaker than the other regions. The locations match well to those of thermal cracks in actual gas turbine combustors in service.

Original languageEnglish
Pages (from-to)848-856
Number of pages9
JournalEngineering Failure Analysis
Volume17
Issue number4
DOIs
Publication statusPublished - 2010 Jun

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

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