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首页> 外文会议>Spring Technical Meeting of the Eastern States Section of the Combustion Institute >G-Scheme-based Simplification and Analysis Methodology for Hydrocarbon Ignition
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G-Scheme-based Simplification and Analysis Methodology for Hydrocarbon Ignition

机译：基于G-Scheme的碳氢化合物点火的简化和分析方法

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For the simulation of reactive flows, the use of a simplified model is a common simplification to reduce the computational cost, although the reduced model may introduce significant errors in the simulation. Using the G-Scheme, the local structure of the local tangent space is characterized through the subspaces associated with the slow, active, and fast reactive scales. This specific feature can be of great significance in the analysis of the dynamics with the aim of achieving a low-dimensional description and allowing a time-scale-aware sensitivity analysis of the problem. Such analysis can be exploited to simplify/reduce/understand the reaction dynamics of interest. We have developed specific procedures to generate simplified mechanisms with an a priori known error for chemical kinetics processes, to analyze them in order to understand the role of the most important reactions, and to identify the most important reactions paths of the processes. The procedure is based on a G-Scheme Participation Index that makes use of a G-Scheme generated database. The effectiveness of the procedures to produce simplified mechanisms is demonstrated by applying them to the auto-ignition problems for homogeneous hydrogen/air and hydrocarbon/air mixtures.
机译：对于反应流的模拟，使用简化模型是降低计算成本的常见简化，尽管降低的模型可能在模拟中引入显着的错误。使用G-Scheme，局部切线的局部结构通过与慢速，有效和快速的反应尺度相关联的子空间的特征。这种特定特征在于在动态的分析方面可以具有重要意义，目的是实现低维描述并允许对问题的时间尺度感知的灵敏度分析。可以利用这种分析来简化/减少/理解感兴趣的反应动态。我们已经开发了具体的程序，为化学动力学过程具有先验的已知错误，以分析它们以便理解最重要的反应的作用，并确定过程中最重要的反应路径。该过程基于G-Scheme参与索引，其利用G-Scheme生成的数据库。通过将它们应用于均匀氢气/空气和烃/空气混合物的自燃问题来证明了生产简化机制的程序的有效性。

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