非灰气体的宽带吸收系数模型

Wide Band Absorption Coefficient Models of Nongray Gases

建立了以宽带模型为基础的关联k模型和重新排列的吸收系数模型 ,并用它们产生了H2 O和CO2 的吸收系数 ,为进一步计算气体介质参与的辐射换热问题提供辐射特性数据·将这两种模型计算所得的有效带宽与Edwards的指数宽带模型进行了比较 ,结果表明这两种模型都可用于实际的工程计算 ,当路径长度较小时 ,关联k模型的结果较准确 ,而当路径长度较大时 。

The correlated k method and the reordered wide band absorption coefficient model were used to generate the absorption coefficients for water vapor and carbon dioxide. The data generated can be applied for the accurate calculation of radiative heat transfer with nongray gases. These two models were also used to calculate the wide band absorption for water vapor and carbon dioxide. These two models agree well with Edwards' wide band model, so they can be used in the engineering calculation. When the path length is short, the correlated k model is more accurate, and when path length is long, the reordered wide band absorption coefficient model is more accurate.