Annual Report 2011-2012

Annual Research Report 2011-2012
Project Title:
Analysis of Failures of 159MW Gas Turbine hub
Department: Metallurgy
Project Manager: M.R. Shirpay
Employer: NRI
Project Code: CMTMP02
Project Staff: A.A. Fallah, M.Ardestani
Project results:
Premature and unexpected failure of hot gas path components in gas turbine can affect
their performance. Such failures result in significant expenditures for the actual repairs
as well as for the purchase of replacement power during the repair outages. The main
failure mechanisms of these components are creep, fatigue, corrosion and erosion. Study
of failure mechanism and causes is necessary to prevent failure repetition in the future.
In this project, the hub failure in a 159 MW gas turbine was investigated and their
operating records were studied.
Finally the hub failure root cause was determined and proper corrective actions were
recommended to prevent failure repetition in the future.
Project Results:
• Determining the main causes of premature failure of 159 MW gas turbine hub
• Recommending preventive methods for failures of 159 MW gas turbine hub
Project Documentation:
• “Analysis of Failures of 159MW Gas Turbine Hub”, Metallurgy Department;
Chemistry and Materials Research Center, NRI, 2011.
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