二甲醚-氢气混合燃料HCCI燃烧与排放试验  

Combustion and Emissions Performance of a HCCI Engine Fueled with DME and Hydrogen Blends

作　　者：梁晨[1] 纪常伟[1] 孔令凯[1] 朱永明[1] 戴晓旭[1] 范伯元[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《农业机械学报》2011年第3期15-20,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50976005);北京市自然科学基金资助项目(3082004)

摘　　要：在压缩比为18.5的HCCI发动机上进行二甲醚（DME）流量分别为2.6和3.5 L/min,不同混氢比例混合燃料的燃烧及排放试验。试验结果表明,在试验工况下,混氢HCCI燃烧可以提高缸压峰值、DME高温氧化放热峰值和制动平均有效压力,当DME流量为3.5 L/min时,混氢使缸压峰值提高26.4%;DME混氢燃烧可以降低CO和HC的排放量,其中CO排放量可以减少到DME HCCI原机燃烧时的20%-30%,但NOx排放量较纯DMEHCCI燃烧有所增加。DME and hydrogen were blended with air in intake and the HCCI combustion was realized.The speed of engine was hold at 1400r/min and the mass flow rate of DME was ranged at 2.6 and 3.5L/min.With the hydrogen fraction increasing,the excessive air coefficient λ was reduced until the engine knocked.The result showed that DME blended with hydrogen could increase the peak pressure,heat release rate and BMEP.The peak pressure was improved 26.4% when the DME flow was 3.5L/min.In the emissions,CO and HC could be reduced,and CO emission was only 20%-30% of the original data after hydrogen enriched.However,NOx emissions increased with the addition of hydrogen.

关 键 词：二甲醚 氢气 均质充量压燃 燃烧 排放 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]