Improved path flux analysis mechanism reduction method for high and low temperature oxidation of hydrocarbon fuels

Abstract

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.

Keywords:

• low temperature
• mechanism reduction
• heat release rate
• hydrocarbon fuels
• chemical kinetics

Acknowledgment

This work was supported by the National Natural Science Foundation of China (No. 51776023 and 91441112). We thank helpful discussion with Prof. Yiguang Ju at Princeton University.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (No. 51776023 and 91441112).