基于窄带模型的新灰气体加权和模型关联式  

New Weighted Sum of Grey Gases Model Correlation Formula Based on Statistical Narrow Band Model

作　　者：聂宇宏[1] 

机构地区：[1]广州航海学院船舶工程学院,广东广州510725

出　　处：《热能动力工程》2016年第11期55-58,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：基于窄带模型计算得到了不同H_2O和CO_2的摩尔比、不同温度、不同行程下的总黑度,以此为基础,提出了可用于富氧燃烧条件下气体辐射换热计算的新的灰气体加权和模型关联式。该关联式中,灰气体的吸收系数和权值均是气体温度以及H_2O和CO_2的摩尔比的函数,而在传统的灰气体加权和模型中气体的灰吸收系数为定值。新的关系式可以提高灰气体加权和模型的准确性,与用统计窄带模型计算得到的总黑度相比,最大相对误差在5%以内。On the basis of various H_2O and CO_2 molar ratios and total blackness at various temperature and travelling distances calculated by using a narrow band model,proposed was a new weighted sum of grey gases model correlation formula for calculating the heat quantity exchanged in radiation from gases under the condition of oxygen-enriched combustion. In the above-mentioned correlation formula,both grey gas absorption coefficient and the weighted value are a function of the gas temperature and the molar ratio between the H_2O and CO_2,however,in the traditional grey gas weight sum model,the grey gas absorption coefficient is a constant. The new correlation formula can enhance the accuracy of the grey gas weight sum model and compared with the total blackness obtained by using the statistical narrow band model,the maximal relative error is within 5%.

关 键 词：窄带模型 灰气体加权和 关联式 摩尔比 温度 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]