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LES combustion modeling using the Eulerian stochastic field method coupled with tabulated chemistry

机译：使用欧拉随机场方法和列表化学方法进行LES燃烧建模

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摘要

In this work a transported joint scalar probability density function method is combined with the flamelet generated manifolds (FGM) tabulated chemistry approach for large eddy simulation (LES) modeling of turbulent combustion. This strategy accounts for the turbulence-chemistry interaction at reasonable computational costs and allows the usage of detailed chemistry information by tabulation. Apart from the details regarding the solution procedure, a technique for an improved stability of the proposed approach is introduced and validated using a one-dimensional test case. Next, a two-dimensional flame configuration is considered in order to perform an in-depth analysis regarding the laminar and turbulent behavior of the model. Here, transient and time-averaged simulation data is used to provide insight into the predicted flame shape and its dynamics, where the implemented approach is compared with the well established artificially thickened flame (ATF) combustion model. Moreover, the sensitivity of the results to different modeling approaches and model parameters is investigated. Finally, the method is applied to a three-dimensional turbulent stratified burner. Here, in addition to the ATF model, the suggested approach is compared to measurements of the velocity and scalar quantities to evaluate its prediction capability. Consequently, the investigation conducted in this work aims to provide a complete picture on the ability of the proposed method to reproduce the flame propagation and the resulting flow conditions within complex premixed and stratified turbulent flames. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：在这项工作中，将运输联合标量概率密度函数方法与小火焰生成歧管（FGM）列表化学方法相结合，用于湍流燃烧的大涡模拟（LES）建模。该策略以合理的计算成本考虑了湍流-化学相互作用，并允许通过列表使用详细的化学信息。除了有关解决程序的细节外，还介绍了一种用于改善所提出方法稳定性的技术，并使用一维测试用例对其进行了验证。接下来，考虑二维火焰构型，以便对模型的层流和湍流行为进行深入分析。在这里，使用瞬态和时间平均的模拟数据来提供对预测火焰形状及其动力学的了解，在此方法中，将已实现的方法与公认的人工增厚火焰（ATF）燃烧模型进行比较。此外，研究了结果对不同建模方法和模型参数的敏感性。最后，将该方法应用于三维湍流分层燃烧器。在此，除ATF模型外，还将建议的方法与速度和标量的测量结果进行比较，以评估其预测能力。因此，在这项工作中进行的研究旨在提供有关所提出的方法在复杂的预混和分层湍流火焰中再现火焰传播以及所产生的流动条件的能力的完整描述。 （C）2016年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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