中文摘要：

目前煤基动力系统主要有三个发展方向：煤气化联合循环系统、燃氢燃气轮机系统和基于煤气化的纯氧燃烧系统。煤基动力系统燃气轮机透平中水蒸气和二氧化碳的含量将会大大增加，透平中的传热会受到导热／对流／辐射耦合作用的影响。为了研究不同非透明气体环境对传热特性的影响，本文采用实验和数值方法进行研究。结果表明，在五种不同燃气组分的工况下，辐射导致的金属板上表面温升约为50-60K，主流燃气中非透明气体的含量越高，辐射导致的温升越小。

英文摘要：

Three types of the coal-based power generation system are promising： IGCC, the hydrogen-fired turbine cycle and the oxy-fuel cycle. The fraction of water vapor and carbon dioxide in the turbine of the coal-based power generation system increase and the heat transfer characteristics of the turbines are affected by the coupled influence of conduction, convection and radiation. In order to study the effect of the hot gas composition in the non-transparent gas environment, both the experimental and the numerical studies are carried out in the present work. The results show that the temperature rise on the plate top surface is about 50-60 K under the condition of the five hot gas compositions due to the radiative heat transfer. The magnitude of the temperature rise is the reverse of the mole fraction of non-transparent gases （CO2＋H2O） in the hot gas.