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用宽带及其修正模型模拟非灰介质的辐射特性，并将它用于区域法模型，计算了非灰气体介质中表面—表面之间的辐射直接交换面积。结果表明：修正的宽带模型对气体辐射特性的描述是比较准确的，且它易于与区域法相结合
The radiation characteristics of non-gray media were simulated by broadband and its modified model and used in the regional model. The direct surface-surface radiation exchange area in non-ashed gas media was calculated. The results show that the modified broadband model is quite accurate in describing the gas radiation characteristics and it is easy to combine with the regional method