采用最优化方法 ,从壁面温度、应力和低循环疲劳寿命等方面对火焰筒壁面结构优化进行初步探讨。优化工作分两个层次。首先 ,采用一维方法对火焰筒冷却结构参数、各段的冷却空气量进行优化。其次 ,对壁厚进行二维优化设计 ,壁温和应力计算均采用轴对称有限元素法 ,低循环疲劳寿命预估参照GE公司的方法[1] 。 The optimal method is used to optimize the structure of the flame tube wall from the aspects of wall temperature, stress and low cycle fatigue life. Optimization work in two levels. First, the one-dimensional method is used to optimize the structural parameters of the cooling structure of the flame tube and the amount of cooling air in each section. Secondly, the two-dimensional optimal design of the wall thickness, wall temperature and stress calculation using axial symmetry finite element method, low cycle fatigue life prediction with reference to GE’s method [1].