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首页> 外文期刊>International Journal of Heat and Mass Transfer >Improved band parameters for a simplified wide band cumulative absorption coefficient distribution model for H_2O and CO_2
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Improved band parameters for a simplified wide band cumulative absorption coefficient distribution model for H_2O and CO_2

机译：用于H_2O和CO_2的简化宽带累积吸收系数分布模型的改进频带参数

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摘要

An accurate and computationally efficient approach to evaluate wide band parameters with polynomial series for use in a simplified wide band cumulative absorption coefficient distribution, g{k), model is presented. The fitting coefficients are determined by a best fit with g(k) functions generated from the latest high resolution spectroscopic database. The approach significantly improves the prediction of the g(k) function over a wide range of temperatures from 500 to 2500 K, pressures from 0.01 to 1.0 atm, and all single bands of H_2O and CO_2. The root mean square error of the predicted absorption coefficient is below 25% except the single 4.3 urn band model. The approach also provides accurate calculations for the wide band absorptance, generally with differences below 7% when compared to benchmark results.
机译：提出了一种精确且计算有效的方法，可使用多项式级数评估宽带参数，以用于简化的宽带累积吸收系数分布g（k）模型。拟合系数由与最新高分辨率光谱数据库生成的g（k）函数的最佳拟合确定。该方法在500至2500 K的宽温度范围，0.01至1.0 atm的宽压力以及H_2O和CO_2的所有单波段范围内，显着改善了g（k）函数的预测。除单个4.3 urn带模型外，预测吸收系数的均方根误差低于25％。该方法还提供了宽带吸收率的准确计算，与基准结果相比，差异通常低于7％。

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