Due to the increasing attention of low temperature combustion, more precise and convenient low temperature chemical reaction mechanism is needed in the combustion reaction flow modelling. However, most of the conventional mechanism reduction methods are difficult to deal with the low temperature mechanism. In order to reduce the low temperature combustion mechanisms of hydrocarbon fuel efficiently, an improved path flux analysis mechanism reduction method (PFA) is proposed. In the improved reduction method, in addition to considering the coupling with the preselected components, the influence on the heat release should be fully considered. By comparing the reaction flow of the method with the traditional PFA method in the process of homogeneous ignition and flame propagation of heptane and octane, the accuracy and efficiency of the improved method (PFAHRR) are fully confirmed. The PFAHRR method is used in the mechanism reduction software ChemRC, which greatly improves the accuracy and efficiency of the software. This new method and tool provide an effective means for the analysis of combustion characteristics of hydrocarbon fuels, especially low temperature kinetics.

中文翻译：

---

烃类燃料高低温氧化的改进路径通量分析机理还原方法

由于低温燃烧越来越受到关注，燃烧反应流建模需要更精确、更便捷的低温化学反应机理。然而，传统的机理还原方法大多难以处理低温机理。为了有效地降低烃类燃料的低温燃烧机理，提出了一种改进的路径通量分析机理简化法（PFA）。在改进的还原方法中，除了考虑与预选元件的耦合外，还应充分考虑对放热的影响。通过比较该方法与传统PFA方法在庚烷和辛烷均相点火和火焰传播过程中的反应流程，改进方法（PFAHRR）的准确性和效率得到充分证实。PFAHRR方法在机理简化软件ChemRC中使用，大大提高了软件的准确性和效率。这种新的方法和工具为分析碳氢燃料的燃烧特性，特别是低温动力学提供了一种有效的手段。