| 火花点火发动机燃用CNG/H_2混合燃料配合EGR的性能和排放研究 |
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| 引用本文： | 胡二江,黄佐华,刘兵,郑建军.火花点火发动机燃用CNG/H_2混合燃料配合EGR的性能和排放研究[J].内燃机学报,2009(5). |
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| 作者姓名： | 胡二江 黄佐华 刘兵 郑建军 |
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| 作者单位： | 西安交通大学动力工程多相流国家重点实验室; |
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| 基金项目： | 国家重大基础研究计划项目(2007CB210006); 国家自然科学基金重点项目(50636040) |
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| 摘 要： | 在一台火花点火天然气发动机上开展了不同掺氢比和EGR率下发动机性能和排放的试验研究。研究结果表明:引入EGR后发动机输出功率下降,但掺氢可以提高大EGR工况下发动机的输出功率。有效热效率随EGR率的增大呈现先升高后降低的趋势;小EGR率下,有效热效率随掺氢比的增加而降低,而大EGR率下,有效热效率随掺氢比的增大而升高。天然气掺氢后NOx排放增加,EGR引入使NOx排放降低,这种降低作用在大掺氢比下更显著。因此,相对于小EGR率工况,大EGR率工况下天然气掺氢表现出更好的性能和排放效果。HC排放随EGR率的增大而增加,随掺氢比的增加而降低。CO和CO2都随EGR率的增加变化不大,随掺氢比的增加而降低。研究表明,天然气掺氢结合EGR可实现火花点火发动机高效低污染燃烧,并能满足欧Ⅳ排放标准。
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| 关 键 词： | 火花点火发动机 天然气 氢气 废气再循环(EGR) 性能 |
Experimental Investigation on the Performance and Emissions of a Spark-Ignition Engine Fuelled with CNG-Hydrogen Blends Combined with EGR |
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| HU Er-jiang,HUANG Zuo-hua,LIU Bing,ZHENG Jian-jun.Experimental Investigation on the Performance and Emissions of a Spark-Ignition Engine Fuelled with CNG-Hydrogen Blends Combined with EGR[J].Transactions of Csice,2009(5). |
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| Authors: | HU Er-jiang HUANG Zuo-hua LIU Bing ZHENG Jian-jun |
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| Affiliation: | HU Er-jiang,HUANG Zuo-hua,LIU Bing,ZHENG Jian-jun(State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China) |
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| Abstract: | An experimental investigation on the influence of different hydrogen fractions and EGR rates on the performance and emissions of a spark-ignition engine was conducted.The results show that EGR utilization decreases the engine power output.However,hydrogen addition can increase the power output at large EGR operation.Thermal efficiency shows an increasing trend at small EGR rate and a decreasing trend with further increase of EGR rate.In the case of small EGR rate,thermal efficiency is decreased with the inc... |
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| Keywords: | Spark ignition engine Natural gas Hydrogen Exhaust gas recirculation Performance |
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