| 缸内直喷天然气/氢气混合燃料配合废气再循环的性能与排放 |
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| 引用本文： | 刘亦夫,刘兵,曾科,周磊,孙璐.缸内直喷天然气/氢气混合燃料配合废气再循环的性能与排放[J].西安交通大学学报,2011,45(7):5-8,69. |
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| 作者姓名： | 刘亦夫 刘兵 曾科 周磊 孙璐 |
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| 作者单位： | 西安交通大学能源与动力工程学院,710049,西安 |
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| 基金项目： | 国家自然科学基金资助项目(50636064,50776070) |
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| 摘 要： | 在一台天然气/氢气混合燃料的缸内直喷火花点火发动机上通过引入废气再循环(EGR)实验研究了EGR率、掺氢比及喷射时刻对发动机性能和排放的影响.结果表明:掺入氢气,在小EGR率时可以减小平均有效压力(BMEP)和有效热效率,在大EGR率时可以增加BMEP和有效热效率;BMEP随EGR率的增大而减小,有效热效率随EGR率的增大先减后增.NOx排放随EGR率的增大而下降,随掺氢比的增大而上升;HC排放随EGR的增大而上升,随掺氢比的增大而下降;CO排放与EGR率变化基本无关,随掺氢比的增大而上升.平均指示压力变动系数Cimep随EGR率的增加而增大,相比于早喷射,晚喷射时Cimep的增大趋势更为明显,此时掺氢可以有效降低Cimep.
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| 关 键 词： | 缸内直喷火花点火 天然气 氢气 废气再循环装置 |
Performance and Emission Characteristics of a Direct-Injection Spark Ignition Hydrogen Enriched Natural Gas Engine Diluted with EGR |
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| LIU Yifu,LIU Bing,ZENG Ke,ZHOU Lei,SUN Lu.Performance and Emission Characteristics of a Direct-Injection Spark Ignition Hydrogen Enriched Natural Gas Engine Diluted with EGR[J].Journal of Xi'an Jiaotong University,2011,45(7):5-8,69. |
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| Authors: | LIU Yifu LIU Bing ZENG Ke ZHOU Lei SUN Lu |
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| Institution: | LIU Yifu,LIU Bing,ZENG Ke,ZHOU Lei,SUN Lu(School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China) |
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| Abstract: | An experimental study was conducted on a direct-injection spark-ignition(DISI) engine fuelled with hydrogen-natural gas blends with the introduction of EGR(exhaust gas recirculation).The effects of the EGR rate,the hydrogen fraction and the injection timing on the engine performance and emission characteristics were investigated.The results show that the hydrogen addition reduced the brake mean effective pressure(BMEP) and the brake thermal efficiency at the lower EGR rate but increased the BMEP and the bra... |
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| Keywords: | direct-injection spark-ignition natural gas hydrogen exhaust gas recirculation |
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