In this paper, radiative entropy generation in a high temperature parallel plate system containing H₂O, CO₂ and soot with non-gray wall was investigated. Based on Discrete Ordinates method and Narrow Band k-distribution model, the spectral radiative entropy generation rate and radiative entropy generation rate due to different physical processes were given. The effects of CO₂, H₂O, soot, spectral emissivity of wall, as well as medium temperature on radiative entropy generation were evaluated. Some conclusions were obtained as below. The irreversibility of emission and reflection process on wall has main contribution on radiative entropy generation rate of system. The radiative entropy generation rate increases with the mole fraction of gas and volume fraction of soot. CO₂ has less effect on total radiative entropy generation rate, but H₂O and soot particle have more effect on total radiative entropy generation rate. The radiative entropy generation rate increases with the increase of total hemispherical absorptance of wall. The radiative entropy generation rate and dimensionless radiative entropy generation increase with the increase of non-uniformity of medium temperature distribution and difference of gas temperature and soot temperature.

本文研究了含有H ₂ O，CO ₂和烟灰且无灰壁的高温平行平板系统中的辐射熵产生。基于离散序数法和窄带k分布模型，给出了不同物理过程引起的光谱辐射熵产生率和辐射熵产生率。CO ₂，H _2的作用评估了O，烟灰，壁的光谱发射率以及介质温度对辐射熵产生的影响。得出以下结论。壁的发射和反射过程的不可逆性对系统的辐射熵产生率有重要贡献。辐射熵产生速率随气体的摩尔分数和烟灰的体积分数而增加。CO ₂对总辐射熵产生速率的影响较小，但H ₂O和烟尘颗粒对总辐射熵产生速率的影响更大。辐射熵的产生速率随着壁的总半球吸收率的增加而增加。辐射熵的产生率和无量纲的辐射熵的产生随着介质温度分布不均匀性的增加以及气体温度和烟尘温度差的增加而增加。