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首页> 外文期刊>International Journal of Heat and Mass Transfer >Application of the WSGG model for the calculation of gas-soot radiation in a turbulent non-premixed methane-air flame inside a cylindrical combustion chamber
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Application of the WSGG model for the calculation of gas-soot radiation in a turbulent non-premixed methane-air flame inside a cylindrical combustion chamber

机译：WSGG模型在圆柱燃烧室内湍流非预混合甲烷-空气火焰中烟尘辐射计算中的应用

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摘要

This paper presents a study of the effect of soot on the radiative heat transfer in a turbulent, non-premixed methane-air flame inside a combustion chamber. In this problem, an important aspect to be considered is the steep variation of the radiative properties of the medium, which is treated with the weighted-sum-of-gray-gases (WSGG) model based on the superposition of correlations recently obtained for water vapor, carbon dioxide mixtures and soot. The discrete ordinates method (DOM) is employed for the angular integration of the radiative transfer equation (RTE), taking into account turbulence-radiation interactions (TRI). Calculations indicate that the global contribution of soot to the radiative heat transfer in the chamber was of 8%, which is compatible with methane flames. However, in the region with the highest concentration of soot, it was observed a local increase of 30% in the radiative volumetric source in the medium, and of 25% in the radiative heat flux on the wall. In the second part of the paper, the WSGG model is compared with the line-by-line (LBL) integration using the final temperature and concentrations fields obtained from the global flame calculation, leading to average and maximum normalized errors of 12% and 4.8%, respectively, and requiring only 1 /7000 of the computation effort of the LBL integration. This result indicates that the WSGG model, in spite of its relative simplicity, can provide accurate results for the spectral integration of the radiative properties of gas-soot mixtures in combustion processes.
机译：本文介绍了烟尘对燃烧室内湍流，未预混合的甲烷-空气火焰中辐射热传递的影响的研究。在这个问题中，要考虑的一个重要方面是介质的辐射特性的急剧变化，它基于最近获得的水的相关性叠加，通过加权灰色气体总和（WSGG）模型进行处理蒸气，二氧化碳混合物和烟灰。考虑到湍流-辐射相互作用（TRI），采用离散纵坐标方法（DOM）进行辐射传递方程（RTE）的角积分。计算表明，烟灰对室内辐射热传递的总体贡献为8％，与甲烷火焰相容。但是，在烟灰浓度最高的区域中，观察到介质中的辐射体积源局部增加了30％，壁上的辐射热通量增加了25％。在本文的第二部分中，使用从全局火焰计算获得的最终温度和浓度场，将WSGG模型与逐行（LBL）集成进行了比较，得出平均和最大归一化误差分别为12％和4.8分别为％和LBL集成所需的计算工作量的1/7000。该结果表明，WSGG模型尽管相对简单，但却可以为燃烧过程中烟gas混合物的辐射特性的光谱积分提供准确的结果。

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  • 作者

    Felipe Roman Centeno; Rogerio Brittes; Francis H.R. Franca; Cristiano Vitorino da Silva;

  • 作者单位

    Department of Mechanical Engineering, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 425, 90050-170 Porto Alegre, RS, Brazil;

    Department of Mechanical Engineering, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 425, 90050-170 Porto Alegre, RS, Brazil;

    Department of Mechanical Engineering, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 425, 90050-170 Porto Alegre, RS, Brazil;

    Department of Engineering and Computer Sciences, Regional Integrated University of Alto Uruguai and Missions, Av. Sete de Setembro, 1621, 99700-000 Erechim, RS, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Radiation heat transfer; WSGG model; Combustion; Soot; Line-by-line; TRI;

    机译：辐射传热;WSGG模型;燃烧;煤烟;逐行;TRI;

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