| 进气氮气含量对柴油机混合气形成与燃烧过程的影响 |
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| 引用本文： | 姚春德,刘增勇,何邦全,高昌卿,孙家峰.进气氮气含量对柴油机混合气形成与燃烧过程的影响[J].燃烧科学与技术,2002,8(3):233-237. |
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| 作者姓名： | 姚春德 刘增勇 何邦全 高昌卿 孙家峰 |
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| 作者单位： | 1. 天津大学内燃机燃烧学国家重点实验室,天津,300072
2. 清华大学汽车安全与节能国家重点实验室,北京,100084 |
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| 基金项目： | 国家教育部重点基金，国家自然科学基金资助项目 (50 0 760 31 ) |
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| 摘 要： | 在一台可以拍摄气缸内混合气形成和燃烧过程的发动机上，用高速摄像机研究了进气中加入不同浓度的氮气（N2）后柴油机的油束发展，混合气形成，着火以及燃烧过程， 同时还采用三基色法对高速摄像机拍摄的燃烧火焰的照片进行了温度场分布的计算分析。拍摄的图像和计算结果表明，加入了不同比例的N2，对燃油束的雾化及混合气的形成过程没有影响，对滞燃期的影响也不大，但对火焰的燃烧最高温度和燃烧室的平均温度降低影响很大。N2的加入量越大，燃烧温度下降越多，燃烧过程结束的也就越早。
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| 关 键 词： | 氮气 柴油机 燃烧过程 |
| 文章编号： | 1006-8740(2002)03-0233-05 |
| 修稿时间： | 2001年3月5日 |
Influence of Intake Air Mixed with N2 on Combustion Process in a Diesel Engine |
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| YAO Chun-de ,LIU Zeng-yong ,HE Bang-quan ,GAO Chang-qing ,SUN Jia-feng.Influence of Intake Air Mixed with N2 on Combustion Process in a Diesel Engine[J].Journal of Combustion Science and Technology,2002,8(3):233-237. |
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| Authors: | YAO Chun-de LIU Zeng-yong HE Bang-quan GAO Chang-qing SUN Jia-feng |
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| Affiliation: | YAO Chun-de 1,LIU Zeng-yong 1,HE Bang-quan 2,GAO Chang-qing 1,SUN Jia-feng 1, |
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| Abstract: | The effects of N 2,with various concentrations in the charging air on the mixing and combustion process were investigated on a single-cylinder 1.04 L direct-injection optical diesel engine in terms of the spray development,fuel and air mixing,ignition and flame development by high speed CCD technology.Analysis of these images obtained by the three basic-color temperature analysis method revealed that the different concentrations of N 2 did not affect the fuel spray developing and fuel/air mixing,but delayed the ignition delay period and had remarkable influences on the maximum combustion temperature as well as the average temperature.The experimental results also show that the more N 2 in the charging,the worse the burning stability. |
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| Keywords: | N 2 diesel engine combustion process |
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