Abstract
In this study, the phenomenological lifetime model was applied to part of an ultra-supercritical steam turbine rotor model to predict its lifetime as a post processing of the finite element method. To validate the accuracy and adaptation of the post processing program, stress-strain hysteresis loops of a cylinderal model under service-like load cycle conditions in cycle N = 1 and 300 were constructed, and the comparison of the results with experimental data on the same cylinderal specimen showed them to be satisfactory. The temperature and von Mises stress distributions of the rotor during a startup-running-shutdown-natural cool process were numerically studied using ABAQUS and the damage caused by the interaction of creep and fatigue was subsequently computed and discussed. It was found that the maximum damage appeared at the inlet notch zone, with the blade groove areas and the front notch areas also suffering a large damage amplitude.
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Recommended by Associate Editor Nam-Su Huh
Nailong Zhao was born in China in 1990. He received the bachelor degree in energy power system and automation from Xi’an Jiaotong University, Xi’an, China, in 2013. He is currently working towards the Ph.D. degree in power engineering and engineering thermophysics from Shanghai Jiaotong University, Shanghai, China. His major areas are lifetime and structural integrity asessment of high-temperature components.
Weizhe Wang is an Associate Professor at Institute of Turbomachinery / Gas Turbine Research Institute, School of Mechanical Engineering, Shanghai Jiao Tong University. His research areas are structural analysis of high-temperature components, constitutive model, and integrity of component.
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Zhao, N., Wang, W., Jiang, J. et al. Study of creep-fatigue behavior in a 1000 MW rotor using a phenomenological lifetime model. J Mech Sci Technol 31, 605–614 (2017). https://doi.org/10.1007/s12206-017-0113-5
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DOI: https://doi.org/10.1007/s12206-017-0113-5