Prediction of thermal fatigue life of a turbine nozzle guide vane |
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| Authors: | Xin-qian Zheng Tao Du Yang-jun Zhang |
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| Institution: | (1) Faculty of Mechanical Engineering, K.N. Toosi University of Technology, P.O. Box 19395-1999, Tehran, Iran |
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| Abstract: | Thermal fatigue (TF) is one of the most important factors that influence turbine’s life. This paper establishes a 3D solid-fluid
coupling model for a steady temperature analysis of a high-pressure turbine nozzle at different turbine inlet gas total temperatures
(TIGTTs). The temperature analysis supplies the temperature load for subsequent 3D finite element analysis to obtain the strain
values. Following this, the prediction of the TF life is made on the basis of equivalent strain range. The results show that
the strain increases with TIGTT, and the predicted TF life decreases correspondingly. This life prediction was confirmed by
one TF test. |
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