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首页> 外文期刊>Journal of Computational Physics >An algorithm for LES of premixed compressible flows using the Conditional Moment Closure model
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An algorithm for LES of premixed compressible flows using the Conditional Moment Closure model

机译：使用条件矩闭合模型的预混合可压缩流LES算法

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摘要

A novel numerical method has been developed to couple a recent high order accurate fully compressible upwind method with the Conditional Moment Closure combustion model. The governing equations, turbulence modelling and numerical methods are presented in full. The new numerical method is validated against direct numerical simulation (DNS) data for a lean premixed methane slot burner. Although the modelling approaches are based on non-premixed flames and hence not expected to be valid for a wide range of premixed flames, the predicted flame is just 10% longer than that in the DNS and excellent agreement of mean mass fractions, conditional mass fractions and temperature is demonstrated. This new numerical method provides a very useful framework for future application of CMC to premixed as well as non-premixed combustion.
机译：已经开发出一种新颖的数值方法，以将最近的高阶精度完全可压缩的迎风方法与条件矩闭合燃烧模型相结合。详细介绍了控制方程，湍流建模和数值方法。针对贫油预混合甲烷槽式燃烧器的直接数值模拟（DNS）数据对新的数值方法进行了验证。尽管建模方法基于非预混火焰，因此不能预期对多种预混火焰均有效，但预测火焰仅比DNS中的火焰长10％，并且平均质量分数，条件质量分数的一致性极佳并演示温度。这种新的数值方法为将来将CMC应用于预混和非预混燃烧提供了非常有用的框架。

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