Purpose

This study aims to numerically investigate the flow features and mixing/combustion efficiencies in a turbulent reacting jet in cross-flow by a hybrid Eulerian-Lagrangian methodology.

Design/methodology/approach

A high-order hybrid solver is employed where, the velocity field is obtained by solving the Eulerian filtered compressible transport equations while the species are simulated by using the filtered mass density function (FMDF) method.

Findings

The main features of a reacting JICF flame are reproduced by the large-eddy simulation (LES)/FMDF method. The computed mean and root-mean-square values of velocity and mean temperature field are in good agreement with experimental data. Reacting JICF’s with different momentum ratios are considered. The jet penetrates deeper for higher momentum ratios. Mixing and combustion efficiency are improved by increasing the momentum ratio.

Originality/value

The authors investigate the flow and combustion characteristics in subsonic reacting JICFs for which very limited studies are reported in the literature.

中文翻译：

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错流中湍流反应射流的 LES/FMDF

目的

本研究旨在通过混合欧拉-拉格朗日方法对横流中湍流反应射流的流动特征和混合/燃烧效率进行数值研究。

设计/方法/方法

采用高阶混合求解器，其中速度场通过求解欧拉滤波可压缩输运方程获得，而物种则使用滤波质量密度函数（FMDF）方法进行模拟。

发现

反应 JICF 火焰的主要特征通过大涡模拟 (LES)/FMDF 方法再现。计算出的速度和平均温度场的均值和均方根值与实验数据非常吻合。考虑了具有不同动量比的反应 JICF。射流穿透得更深以获得更高的动量比。通过增加动量比提高混合和燃烧效率。

原创性/价值

作者研究了亚音速反应 JICF 的流动和燃烧特性，文献中报道了非常有限的研究。