【摘要】 以 600 MW 汽轮机高压转子为对象,以有限元法的手段,通过滑参数停机及其后的自然冷却过程的计算得出强制冷却初始温度场,在几种典型的空气温度分段曲线下计算出高压转子热应力,为强制冷却实验设计提供依据.介绍计算模型的选取、网格的划分及边界条件的确定.更多还原

【Abstract】 A long with the commissioning of high－parameter large－sized generating units, to employ forced cooling to reduce shutdown time will bring about considerable economical benefit． With the high pressure rotors of 600 MW steam turbines as the object of study． This paper calculates the thermal stress of rotor under the given various forced cooling curves by using finite element method ． The initial temperature field of forced cooling is obtained through calculating the temperature field during the sliding parameter shutdown and the following natural cooling process． The forced cooling curves are given in the form of given cooling air temperature section． The paper introduces calculation model, selection of parameters, boundary condition and grid partition．更多还原