PREDICTION OF SELF-ABSORPTION IN OPPOSED FLOW DIFFUSION AND PARTIALLY PREMIXED FLAMES USING A WEIGHTED SUM OF GRAY GASES MODEL (WSGGM)-BASED SPECTRAL MODEL
PREDICTION OF SELF-ABSORPTION IN OPPOSED FLOW DIFFUSION AND PARTIALLY PREMIXED FLAMES USING A WEIGHTED SUM OF GRAY GASES MODEL (WSGGM)-BASED SPECTRAL MODEL
复制标题
使用基于灰色气体加权和模型 (WSGGM) 的谱模型预测逆流扩散和部分预混火焰中的自吸收
DOI：
10.1080/713838232
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Xue Lei Zhu
中科院分区：
文献类型：
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作者：
Ook Jong Kim;J. Gore;R. Viskanta;Xue Lei Zhu
基于灰色气体加权和模型（WSGGM）的低分辨率光谱模型用于计算燃烧气体中的辐射传输，用于估计一维逆流火焰中辐射能量的自吸收。为了能够进行包括自吸收在内的详细化学-辐射相互作用计算，开发这样的模型是必要的。创建了可应用于各种一维逆流扩散和部分预混火焰的能带模型参数数据库。这种基于现场火焰属性的数据库对于将 WSGGM 应用于真实火焰是必要的，因为以前开发的数据库仅适用于均匀和等温辐射路径。为了验证模型和数据库，计算了沿垂直于燃料出口平面的方向离开扁平火焰的低分辨率光谱强度，并将其与基于柯蒂斯-戈德森近似的窄带模型的结果进行比较。他们之间达成了良好的协议。将所得辐射模型耦合到 OPPDIF 代码以计算辐射能的自吸收，并与光学薄计算的结果以及结合统计窄带模型的离散坐标计算的结果进行比较。对于这里考虑的火焰，发现了显着的辐射自吸收，特别是在反应区的燃料侧。然而，在这种情况下，自吸收对火焰结构没有显着影响。即使在低速扩散火焰和低当量比的部分预混火焰的情况下，辐射自吸收对火焰温度和微量物质产生的影响也不显着。
A weighted sum of gray gases model (WSGGM)-based low-resolution spectral model for calculating radiation transfer in combustion gases is applied to estimate self-absorption of radiation energy in one-dimensional opposed-flow flames. Development of such a model is necessary in order to enable detailed chemistry-radiation interaction calculations including self-absorption. A database of band model parameters which can be applied to various one-dimensional opposed-flow diffusion and partially premixed flames is created. This in-situ flame property-based database is necessary for the application of the WSGGM to real flames, since previously developed databases were only for homogeneous and isothermal radiation paths. For the validation of the model and database, low-resolution spectral intensities leaving the flat flame in a direction normal to the fuel exit plane are calculated and compared with the results of a narrow-band model based on the Curtis-Godson approximation. Good agreement has been found between them. The resulting radiation model is coupled to the OPPDIF code to calculate the self-absorption of radiant energy and compared with the results of an optically thin calculation and the results of a discrete ordinates calculation in conjunction with the statistical narrow-band model. Significant self-absorption of radiation is found for the flames considered here, particularly on the fuel side of the reaction zone. However, the self-absorption does not have significant effects on the flame structure in this case. Even in the cases of low-velocity diffusion flame and a partially premixed flame having a low equivalence ratio, the effects of self-absorption of radiation on the flame temperature and the production of minor species are not significant.