【作者】 王恭义； 程凯； 陈勇； 杨建道； 余德启； 吴晓明； 彭泽瑛；

【Author】 WANG G.Y.~1 CHENG K~(1,3) CHEN Y.~2 YANG J.D.~1 YU D.Q.~1 WU X.M.1 PENG Z.Y.~1 Shanghai Electric Power Generation Technology R&D Center,shanghai 201612,China) Shanghai Jiao Tong University,shanghai 200240,China) Xi’An JiaoTong University,Xi’An 710049,China)

【机构】 上海电气电站技术研究与发展中心； 西安交通大学； 上海交通大学；

【摘要】 以某百万千瓦汽轮机高压第一级动叶为分析对象,根据蠕变试验数据,采用最小二乘法拟合了幂蠕变方程中的各个参数,将应力计算结果与试验数据作对比并修正了参数。借助CFD分析软件,计算了流体域内的对流换热系数并插值到有限元(FEA)计算程序中,然后分析了叶根倒角处危险区域的蠕变应力状况。计算结果与试验数据比较接近,证明了该拟合方法的可靠性。分析结果表明CAE技术在汽轮机高温蠕变分析中可以起到重要作用。更多还原

【Abstract】 In this paper,the high-temperature creep analysis for the first stage HP rotating blades of 1000MW USC steam turbine is investigated.Based on the creep test data,the generalized least squares method is adopted to fit the each parameter of the power-law equation.The calculated stress results are compared with the test data,and then the parameters of power-law equation are updated.The coefficients of heat transfer in fluid domain are computed in CFD analysis software and then interpolated to the FEA program.Then the creep stress in the key area of root chamfer is deeply discussed.The fitting method is proved to be reliable because of the small difference between the computed results and test data.The analysis results indicate that CAE technology is very important in the creep analysis of the steam turbine.更多还原