201605
CH4在O2/CO2气氛下均相着火延迟的模拟研究
周凯，邹春，宋昱，吴迪，刘洋
（华中科技大学煤燃烧国家重点实验室，湖北武汉430074）
摘要： 分析在不同燃烧气氛（O2/CO2，O2/N2，O2/X） 下，CH4着火延迟和自动着火温度的规律。结果表明，在相同CO2
体积分数下，O2/X气氛下着火延迟时间明显比O2/CO2气氛下短，下降比为12%～17%，且自动着火温度也明显降低，说明
在O2/CO2气氛下着火延迟不仅是因为CO2的高比热容和低扩散性等物理原因，CO2的化学性质也有很大影响。
关键词： 富氧燃烧；着火延迟；化学性质；自动着火温度
中图分类号： TK16 文献标识码： A 文章编号： 2095-0802-(2016)05-0114-02
Simulation Study on Homogeneous Ignition Delay of CH4 under O2/CO2 Atmosphere
ZHOU Kai, Zou Chun, SONG Yu, WU Di, LIU Yang
(National Key Laboratory, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China)
Abstract: This paper analyzed the rule of CH4 ignition delay and automatic ignition temperature in different combustion atmosphere(
O2/CO2，O2/N2，O2/X). The results showed that, in the same volume fraction of CO2, ignition delay time in O2/X atmosphere is
obviously shorter than in O2/CO2 atmosphere, drop ratio is 12%~17%, and automatic ignition temperature is also significantly
reduced, and it was proved that ignition delay in O2/CO2 atmosphere was not only because of the physical causes such as high
specific heat of CO2 and low diffusivity, but also because of the big effect of chemical properties of CO2.
Key words: oxygen-enriched combustion; ignition delay; chemical properties; auto ignition temperature
