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首页> 外文期刊>Combustion Science and Technology >NUMERICAL STUDY OF EMISSION CHARACTERISTICS OF A JET FLAME IN CROSS-FLOW
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NUMERICAL STUDY OF EMISSION CHARACTERISTICS OF A JET FLAME IN CROSS-FLOW

机译：横流射流火焰排放特性的数值研究

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摘要

The authors numerically investigated the effect of changes in the fuel exit velocity and the cross-flow on the length, radiant fraction, and emission indices of pollutant species (NO_X and CO), as well as the ratio NO_2INO_X, of a high momentum jet flame in cross-flow. This flow configuration is of generic interest, and also practically relevant to flaring operations. The flow field is computed based on the Reynolds-Averaged Navier-Stokes equations incorporating the realizable k-ε turbulence closure. The combustion process is modeled using the unsteady Eulerian particle flamelet model based on the mixture fraction approach, and the heat loss by radiation is accounted for using the discrete ordinates method. Comparison of the predicted flame length and the trend of the emission indices with experimental measurements reveal good agreement for the range of jet-to-cross-flow momentum flux ratios investigated, namely 100-800.
机译：作者数值研究了燃料出口速度和错流的变化对高动量喷射火焰的污染物（NO_X和CO）的长度，辐射分数和排放指数以及NO_2INO_X比率的影响。在横流。这种流动配置是普遍关注的，并且实际上与扩口操作有关。基于结合了可实现的k-ε湍流闭塞的雷诺平均Navier-Stokes方程计算流场。使用基于混合物分数法的非稳态欧拉粒子小火焰模型对燃烧过程进行建模，并使用离散坐标法计算辐射热损失。预测的火焰长度和排放指数趋势与实验测量结果的比较表明，所研究的射流与横流动量通量比范围为100-800，具有很好的一致性。

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  • 来源
    《Combustion Science and Technology》 |2010年第12期|p.1491-1510|共20页
  • 作者

    M. S. Lawal; M. Fairweather; D. B. Ingham; L. Ma; M. Pourkashanian; A. Williams;

  • 作者单位

    School of Process, Environmental and Materials Engineering, University of Leeds, England;

    School of Process, Environmental and Materials Engineering, University of Leeds, England;

    School of Process, Environmental and Materials Engineering, University of Leeds, England;

    School of Process, Environmental and Materials Engineering, University of Leeds, LS2 9JT, England;

    School of Process, Environmental and Materials Engineering, University of Leeds, England;

    School of Process, Environmental and Materials Engineering, University of Leeds, England;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    flame length; flamelets; flares; pollutants; radiant fractions;

    机译：火焰长度小火焰;耀斑污染物;辐射分数;

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