Prediction of thermal fatigue life o

Prediction of thermal fatigue life of a turbine nozzle guide vane

Abstract：Thermal fatigue (TF) is one of the most important factors that influence turbines 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. 作者： Author： Xin-qian ZHENG[1]  Tao DU[2]  Yang-jun ZHANG[1] 作者单位： State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, ChinaBeijing Power Machinery Research Institute, Beijing 100074, China 期 刊： 浙江大学学报（英文版）（A辑：应用物理和工程）   ISTICEISCI Journal： JOURNAL OF ZHEJIANG UNIVERSITY SCIENCE A 年，卷(期)： 2011, 12(3) 分类号： V235.1 Keywords： Engine    Nozzle guide vane    Thermal fatigue (TF) life    Solid-fluid    机标分类号： TG2 TV1 机标关键词： guide vane    turbine    finite element analysis    life prediction    coupling model    influence    different    decreases    results    factors    total    paper    basis    made    gas 基金项目： supported by the National Natural Science Foundation of China

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