【摘要】 水蒸气、二氧化碳和烟黑是燃烧过程的重要生成产物,在燃烧过程中它们对辐射换热有着重要的影响。对于平行平板间气体的一维非灰辐射问题,采用统计窄谱带模型及关联K模型,研究烟黑颗粒对水蒸气和二氧化碳混合物非灰辐射的影响,并基于窄谱带数据库提出计算普朗克平均吸收系数的新方法。比较发现,提出的新方法简捷,其计算结果与文献结果吻合较好。更多还原

【Abstract】 The important combustion products are mainly water vapor, carbon dioxide and soot. Radiation from them is very important for combustion system. Based on the statistical narrow-band(SNB) model and the statistical narrow-band correlated-K(SNBCK) model, a comprehensive investigation of the influence of soot on non gray radiation from water vapor and carbon dioxide mixtures in planar plates was conducted and a proposed approach was developed to calculate the Planck mean absorption coefficients. Very good agreement in radiative source term and Planck mean absorption coefficients was observed between the present results and that was also reported in the literatures.更多还原