Analysis of the flamelet concept in the numerical simulation of laminar partially premixed flames
Analysis of the flamelet concept in the numerical simulation of laminar partially premixed flames
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DOI：
10.1016/j.combustflame.2007.12.004
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发表时间：
2008-04
影响因子：
4.4
通讯作者：
R. Consul;A. Oliva;C. Pérez-Segarra;D. Carbonell;D. Goey
中科院分区：
文献类型：
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作者：
R. Consul;A. Oliva;C. Pérez-Segarra;D. Carbonell;D. Goey
本文的目的是分析基于混合率及其耗散率的火焰面模型在部分预混火焰数值模拟中的应用。尽管这些模型的主要应用是湍流火焰的计算，但这项工作的重点是小火焰概念在层流火焰模拟中的性能，以这种方式消除湍流闭合相互作用。选择了一种著名的同向流动甲烷/空气层流火焰。考虑了从当量比Φ=∞（非预混）到Φ=2.464的五个预混水平。使用火焰的方法得到的结果进行比较，从完整的运输方程，使用原始变量的详细解决方案获得的数据。对流火焰的数值模拟也支持的结果进行了讨论。特别强调的标量耗散率建模的分析。
The aim of this work is to analyze the application of flamelet models based on the mixture fraction variable and its dissipation rate to the numerical simulation of partially premixed flames. Although the main application of these models is the computation of turbulent flames, this work focuses on the performance of flamelet concept in laminar flame simulations removing, in this way, turbulence closure interactions. A well-known coflow methane/air laminar flame is selected. Five levels of premixing are taken into account from an equivalence ratio Φ=∞ (nonpremixed) to Φ=2.464. Results obtained using the flamelet approaches are compared to data obtained from the detailed solution of the complete transport equations using primitive variables. Numerical simulations of a counterflow flame are also presented to support the discussion of the results. Special emphasis is given to the analysis of the scalar dissipation rate modeling.