Research and development of a high-quality thermal-stress online monitoring model for the 600 MW turbine |
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Authors: | Zhang Hengliang Xie Danmei Xiong Yangheng and Sun Kunfeng |
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Affiliation: | (1) Department of Power and Energy, Wuhan University, Wuhan, 430072, China;(2) Department of Energy and Environment, Zhongyuan University of Technology, Zhengzhou, 450007, China |
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Abstract: | To monitor and control its thermal state, a rotor’s temperature and thermal stress fields must be calculated in real time.
After some reasonable assumptions and simplification, iterative models of the rotor’s temperature and thermal stresses were
obtained with an integral transform based on a two-dimensional axis-symmetry thermal conduction differential equation. The
models can deal with some nonlinear factors such as material and boundary condition. An example is given to compare results
computed by the finite element method (FEM) and one-dimensional models. The result shows that the analytical model gained
has high quality and the computing course is very short. The iterative formulas could be used not only to analyze the rotor’s
thermal states of turbine, but to monitor and control them online. The method adopted can be used to analyze the thermal state
of other axis-symmetry objects having similar boundary conditions.
Translated from Proceeding of the CSEE, 2006, 26(1): 21–25 译自:中国电机工程学报] |
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Keywords: | two-dimensional axis-symmetry object thermal conduction differential equation integral transform iterative temperature and stress online calculation iterative analytical model |
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