中文摘要：

温度场计算的准确性对气冷涡轮的设计影响极大。实际的气冷涡轮在运行状态下，存在多种物理现象：冷气带来的燃气组分变化、湍流、转捩、温度边界层的发展变化、热辐射等。而在数值计算中，计算结果也要受到网格质量的影响。采用自编程序、商业CFD软件对某两级气冷涡轮、C3X以及MARKⅡ叶片进行计算，分别描述冷气组分变化、计算网格、湍流模型以及转捩温度场模拟精度的影响；同时定性分析温度边界层复合性质与辐射换热对温度计算的影响。得出在气热耦合计算中，考虑上述因素的影响是很有必要的。

英文摘要：

The accuracy of prediction of thermal filed was essential for the design of air-cooled turbines. There existed kinds of physical progresses in real turbines, such as component variation of gas caused by injecting coolant, turbulence, transition, development of thermal boundary layer and thermal radiation. And mesh quality would affect results of simulation. With a set of self-programming code, HIT3D, ANSYS-CFX and Fluent, a two-stage turbine, C3X and MARKII vanes were simulated to study the influence s of component diffusion, mesh quality, turbulence models and transition on the accuracy of predicting thermal fields. Such influences of multi-layer character of thermal boundary layer and thermal radiation were qualitatively analyzed. Finally it concluded that the factors mentioned above should be well considered in conjugate heat transfer simulation to predict thermal field accurately.