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汪子涵

作品数:2 被引量:4H指数:1
供职机构:合肥工业大学机械与汽车工程学院更多>>
发文基金:安徽省自然科学基金更多>>
相关领域:动力工程及工程热物理环境科学与工程理学更多>>

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Effect of Hydrogen Addition on Methane HCCI Engine Ignition Timing and Emissions Using a Multi-zone Model被引量:1
2009年
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 tim- ing 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 appli- cation, 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 recir- culation (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.
汪子涵汪春梅唐华欣左承基徐宏明
关键词:METHANEEMISSION
PCCI结合EGR对柴油机燃烧排放的影响被引量:3
2010年
燃烧过程对发动机的整机性能有着重要的影响,通过调整进气门关闭时刻和提前喷油角度可以实现预混压燃,预混压燃(PCCI)能够很好的控制SOOT的排放,但对降低NOx排放不是很明显,PCCI结合外部EGR可以很好地控制NOx的排放。本文运用三维CFD模型对由4102BZLQ柴油机改造的PCCI进行了数值模拟,分析预混压燃对燃烧排放的影响,针对PCCI中NOx高排放问题加入外部EGR,对比不同EGR率时NOx、CO、HC排放的变化,并分析了可能导致NOx、CO、HC变化的机理。
马勇汪春梅汪子涵王立杰左承基
关键词:预混压燃废气再循环可变气门正时
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