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Effect of Hydrogen Addition on Methane HCCI Engine Ignition Timing and Emissions Using a Multi-zone Model
Zi-han Wang,Chun-mei Wang*,Hua-xin Tang,Cheng-ji Zuo,Hong-ming Xu
Author NameAffiliationE-mail
Zi-han Wang School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009,China  
Chun-mei Wang* School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009,China chunmei.wang@hotmail.com 
Hua-xin Tang School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009,China  
Cheng-ji Zuo School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009,China  
Hong-ming Xu Mechanical and Manufacturing Engineering, School of Engineering, The University of Birmingham,Edgbaston, Birmingham B15 2TT, UK  
Abstract:
Ignition timing control is of great importance in homogeneous charge compression ignition engines. The effect of hydrogen addition on methane combustion was investigated using a CHEMKIN multi-zone model. Results show that hydrogen addition advances ignition timing and enhances peak pressure and temperature. A brief analysis of chemical kinetics of methane blending hydrogen is also performed in order to investigate the scope of its application, and the analysis suggests that OH radical plays an important role in the oxidation.Hydrogen addition increases NOx while decreasing HC and CO emissions. Exhaust gas recirculation (EGR) also advances ignition timing; however, its effects on emissions are generally the opposite. By adjusting the hydrogen addition and EGR rate, the ignition timing can be regulated with a low emission level. Investigation into zones suggests that NOx is mostly formed in core zones while HC and CO mostly originate in the crevice and the quench layer.
Key words:  Homogeneous charge compression ignition, Multi-zone model, Methane, Hy-drogen, Ignition timing, Emission
FundProject:
Effect of Hydrogen Addition on Methane HCCI Engine Ignition Timing and Emissions Using a Multi-zone Model
汪子涵,汪春梅*,唐华欣,左承基,徐宏明
摘要:
通过使用CHEMKIN多区模型研究添加氢气对甲烷燃烧的影响. 结果显示添加氢气提前点火正时并且提高最高压力和最高温度. 同时,用简易的化学反应动力学分析它的适用范围. 结果表明羟基在燃料的氧化中起重要作用. 添加氢气增加氮氧化物的排放,但会降低碳氢和一氧化碳的排放. 废弃再循环也会提前点火正时,但是它对排放的影响相反. 通过调节添加氢气与废弃再循环的量,点火正时可以在低排放的条件下进行调节. 研究发现氮氧化物主要产生在核心区,而碳氢和一氧化碳主要产生在缝隙区和边界层区.
关键词:  均质压燃,多区模型,甲烷,氢气,点火正时,排放
DOI:10.1088/1674-0068/22/03/290-296
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