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首页> 外文期刊>American journal of fluid dynamics >LES Modelling of Nitric Oxide (NO) Formation in a Propane-Air Turbulent Reacting Flame
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LES Modelling of Nitric Oxide (NO) Formation in a Propane-Air Turbulent Reacting Flame

机译：丙烷-空气湍流反应火焰中一氧化氮（ NO ）形成的LES模型

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Large Eddy Simulation (LES) technique is applied to investigate the nitric oxide (NO ) formation in the propane-air flame inside a cylindrical combustor. In LES a spatial filtering is applied to the governing equations to separate the flow field into large scale eddies and small scale eddies. The large scale eddies which carry most of the turbulent energy are resolved explicitly while the unresolved small scale eddies are modelled. A Smagorinsky model with model constant C _(s ) = 0.1 as well as a dynamic model has been employed for modelling of the sub-grid scale eddies, while the nonpremixed combustion process is modelled through the conserved scalar approach with laminar flamelet model. In NO formation model, the extended Zeldovich (thermal) reaction mechanism is taken into account through a transport equation for NO mass fraction. The computational results are compared with those of the experimental results investigated by Nishida and Mukohara [1] in co-flowing turbulent flame.
机译：应用大涡模拟（LES）技术研究圆柱形燃烧器内部丙烷-空气火焰中一氧化氮（NO）的形成。在LES中，将空间滤波应用于控制方程，以将流场分为大涡流和小涡流。带有大部分湍流能量的大型涡旋被明确解析，而未解析的小型涡旋则被建模。模型常数为 C _（ s）= 0.1的Smagorinsky模型以及动态模型已用于子网格规模涡流的建模，而非预混燃烧过程是通过守恒标量方法建模的层流小火焰模型。在NO形成模型中，通过关于NO质量分数的迁移方程考虑了扩展的Zeldovich（热）反应机理。将计算结果与Nishida和Mukohara [1]在同流湍流火焰中研究的实验结果进行了比较。

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