燃气轮机透平叶片流-热-固耦合分析及蠕变寿命预测  

Fluid-thermal-mechanical Coupling Analysis and Creep Life Prediction of Gas Turbine Blade

作　　者：肖力伟 刘建军[1] 李晨[1,2] 安柏涛 付经伦[1] 张晓东[1] XIAO Liwei;LIU Jianjun;LIChen;AN Baitao;FU Jinglun;ZHANG Xiaodong(Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《燃气轮机技术》2018年第2期23-28,共6页Gas Turbine Technology

基　　金：国家自然科学重点基金项目(Y3113015D1)

摘　　要：本文采用流-热-固耦合方法,对某燃气轮机透平动叶的流场、温度场以及应力分布进行了计算分析,并据此对叶片的蠕变寿命进行了计算,得到了蠕变寿命云图,发现该叶片的寿命最短点与温度最高点、应力最大点不在同一位置。相较于传统的选取温度最高和应力最大的节点作为危险点进行寿命分析的方法,对叶片所有节点进行寿命计算,形成寿命云图的方法,能更加直观准确地找到寿命最短的位置,从而更好地评估设计方案。In this paper,the flow field,temperature field and stress distribution of turbine blades of a gas turbine were calculated and analyzed using the fluid-thermal-mechanical coupling method. The creep life of the blade was calculated accordingly,and the creep life cloud is obtained. The point of shortest life of the blade is not at the same position as the point of highest temperature and the point of maximum stress. The traditional method selected points of the highest temperature or the maximum stress as the danger point for life analysis. Compared with that the method for calculating the life of all the nodes of the blade and forming the life cloud diagram can find the position with the shortest life more directly and accurately. Thus evaluate the design plan better.

关 键 词：流-热-固耦合 透平叶片 蠕变 寿命预测 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]