摘要
基于详细化学反应机理的燃烧数值模拟存在很大的困难:详细化学反应机理会导致化学反应流涉及到广泛的时间尺度;随着燃料所含碳原子数目的增加,其详细化学反应机理中所含的组分数目与基元化学反应数目会呈指数增长,这都直接导致计算量的急剧增加。本文基于乙烯氧化的详细化学反应机理,采用反应路径分析法得到简化机理,并模拟了不同条件下乙烯/空气的着火过程与火焰传播过程,验证了简化化学反应机理的可靠性。
There are great challenges in combustion simulation including detailed chemical mecha- nism： reactive flow covers a broad range of characteristic time scales resulted from detail chemistry; moreover, the number of species and reactions in detailed chemistry increase exponentially with the carbon number in the hydrocarbon fuel, which directly increases the computational time. In this study, the detailed oxidation mechanism of ethane is reduced by path flux analysis. Numerical simulations of the ignition and flame propagation processes at different conditions are conducted. The results demonstrated the reliability of the reduced mechanism.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2013年第2期376-379,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50976003
No.51136005)
内燃机国家重点实验室开放课题(No.K2010-02)
关键词
乙烯
机理简化
着火延迟时间
ethane
mechanism reduction
ignition delay time
