| 进气氧浓度对柴油机低温燃烧影响的试验研究 |
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| 引用本文： | 张全长,尧命发,郑尊清,张鹏. 进气氧浓度对柴油机低温燃烧影响的试验研究[J]. 内燃机学报, 2009, 27(4) |
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| 作者姓名： | 张全长 尧命发 郑尊清 张鹏 |
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| 作者单位： | 天津大学,内燃机燃烧学国家重点实验室,天津,300072;天津大学,内燃机燃烧学国家重点实验室,天津,300072;天津大学,内燃机燃烧学国家重点实验室,天津,300072;天津大学,内燃机燃烧学国家重点实验室,天津,300072 |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 为了研究低温燃烧机理的极端情况,即废气中不含比热容较小的N2,通过向进气管喷入CO2气体控制进气氧浓度、改变喷油量、喷油时刻、喷油压力等,研究了进气氧浓度对柴油机燃烧和排放特性的影响.结果表明,随进气氧浓度降低,在喷油量为25 mg/cyc时,放热速率逐渐降低,而在喷油量为50 mg/cyc时,放热速率先升高后降低;较低进气氧浓度时,燃烧呈明显的两阶段放热.喷油量为50 mg/cyc时,降低碳烟排放最有效的途径是提高喷油压力.综合性能和排放,喷油提前角应不小于20°CA,此时NOx和碳烟排放较低,且可保持较高的热效率.
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| 关 键 词： | 进气氧浓度 CO2 惰性气体 燃烧 排放 |
The Effects of Intake Oxygen Concentration on the Combustion and Emission Characteristics of the Diesel |
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| ZHANG Quan-chang,YAO Ming-fa,ZHENG Zun-qing,ZHANG Peng. The Effects of Intake Oxygen Concentration on the Combustion and Emission Characteristics of the Diesel[J]. Transactions of Csice, 2009, 27(4) |
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| Authors: | ZHANG Quan-chang YAO Ming-fa ZHENG Zun-qing ZHANG Peng |
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| Affiliation: | State Key Laboratory of Engines;Tianjin University;Tianjin 300072;China |
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| Abstract: | To investigate the extreme condition of Low Temperature Combustion(LTC),referring to absence of N2 in the exhaust gas,CO2 gas with variable injection mass,injection timing and injection pressure was injected into the intake pipe.The results showed that with increase of oxygen concentration,heat release rate decreased gradually at injection mass of 25 mg/cyc,and heat release rate showed an increasing trend and then decreasing trend at injection mass of 50 mg/cyc.At low intake oxygen concentration,a two-stage... |
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| Keywords: | CO2 Intake oxygen concentration CO2 Inert gas Combustion Emissions |
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