N_2+H_2O稀释氢/空气混合气层流燃烧特性  

Laminar Combustion Characteristic of Hydrogen/Air Mixture Under N_2 and H_2O Dilution

作　　者：段俊法[1,2] 庞福娥 刘福水[2] 

机构地区：[1]华北水利水电大学机械学院,郑州450000 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《燃烧科学与技术》2016年第2期161-166,共6页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51276019)

摘　　要：氢内燃机废气再循环的主要成分是N2和H2O,探索N2+H2O稀释条件下的氢/空气混合气层流燃烧特性具有重要理论和实际应用.基于定容燃烧测试系统,采用分压法匹配混合气成分,试验研究了稀释条件下的氢/空气混合气层流燃烧特性.结果表明,稀释对于氢/空气混合气的火焰传播有显著的影响:已燃区温度、无拉伸火焰传播速率和氢/空气混合气层流燃烧速度随着稀释率的增加而显著下降;同时,随着稀释率的增大,火焰拉伸率和马克斯坦长度略微减小,火焰的稳定性有所下降.Hydrogen fuel engine exhaust gas recirculation is mainly composed of N2 and H2O,and thus exploringthe laminar combustion characteristic of hydrogen and air under N2 and H2O dilution is of great theoretical and practicalimportance.Based on the constant volume combustion test systems,the laminar combustion characteristic of hydrogenand air under dilution was studied experimentally by the method of the partial pressure matching mixture composition.Results showed that the dilution has a significant effect on the flame propagation of hydrogen and airmixture.Temperature in burned zone,unstretched flame propagation speed and the laminar burning velocity of hydrogenand air decrease significantly with the increase dilution rate.At the same time,with increasing dilution rate,the flame stretch rate and the Markstein length decrease slightly,and the flame stability declines.

关 键 词：氢/空气混合气 N2+H2O稀释 已燃区温度 层流燃烧速度 马克斯坦长度 

分 类 号：TK91[动力工程及工程热物理]