二氧化碳辐射特性分析与计算

用宽带k分布模型的传统模型和改进模型计算了CO2要辐射带的g-k分布并与逐线计算结果进行对比.结果表明,随温度升高,气体的吸收系数增大,并且由改进模型计算的结果相对较好,与逐线计算的结果更为接近.分别用指数宽谱带模型、宽带k分布的传统模型与改进模型计算了CO2各谱带在不同温度、不同行程长度下的发射率,并与逐线计算结果比...

Analysis and calculation of radiative properties of carbon dioxide

Two wide-band correlated-k distribution models,improved wide-band correlated-k distribution model and traditional wide-band correlated-k distribution model,were used to calculate the absorption coefficient cumulative distribution function of carbon dioxide.The results obtained with the two models were compared with the line-by-line results.The results show that the absorption coefficient of carbon dioxide increases with the rising of temperature at the same pressure.The improved model accurately describes the absorption coefficient distributions compared to existing line-by-line results.The emissivity of carbon dioxide under different temperatures and range of path lengths were obtained.And three methods,the exponential wide band model,improved wide-hand correlated-k model and traditional wide-band correlated-k distribution model,were used here.The results were compared with the line-by-line results.It is concluded that the improved wide-band correlated-k distribution model is more close to the benchmark results.The improved model yields more accurate results of carbon dioxide under the normal pressure.