Combustion Turbine (CT) Hot Section Coating Life Management

Viswanathan, R. ; Gandy, D. ; Krzywosz, K. ; Cheruvu, S. ; Wan, E.

Electric Power Research Inst

关键词: Service Life;    36 Materials Science;    Turbomachinery;    42 Engineering;    Thermal Fatigue;   

DOI  :  10.2172/897808
RP-ID  :  None
RP-ID  :  FC26-01NT41231
RP-ID  :  897808

美国|英语

来源: UNT Digital Library

【 摘 要 】

The integrity of coatings used in hot section components of combustion turbines is crucial to the reliability of the buckets. This project was initiated in recognition of the need for predicting the life of coatings analytically, and non-destructively; correspondingly, three principal tasks were established. Task 1, with the objective of analytically developing stress, strain and temperature distributions in the bucket and thereby predicting thermal fatigue (TMF) damage for various operating conditions; Task 2 with the objective of developing eddy current techniques to measure both TMF damage and general degradation of coatings and, Task 3 with the objective of developing mechanism based algorithms. Task 4 would be aimed at verifying analytical predictions from Task 1 and the NDE predictions from Task 3 against field observations. Task 5 would develop a risk-based decision analysis model to make run/repair decisions. This report is a record of the progress to date on these four tasks.