关于甲醛在压缩引燃发动机燃烧过程中的作用的研究

2017/09/14   下载量： 5 次

方案摘要

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应用领域 汽车及零部件
检测样本 汽车电子电器
检测项目 理化分析>VOC含量
参考标准 暂无

采用LaVision公司特色的以图像增强器为核心部件构成的平面激光诱导荧光（PLIF）测试系统对甲醛在压缩引燃发动机燃烧过程中的作用进行了研究和分析

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Combustion of a premixed-charge by compression
ignition is a promising alternative combustion process
as it allows part load operation with high dilution
rate (air and/or residual gas dilution) while preserving
engine stability. This combustion process attracted
attention on account of its potential for achieving
high efficiency and ultra-low NOx emissions [1, 2, 3,
4]. When using commercial gasoline as fuel, autoignition
of a premixed charge in a four-stroke engine
can be achieved with high compression ratio, inlet air
heating or residual gas trapping. CAI refers to autoignition
combustion obtained with a high proportion
of burned gases trapped in the fresh mixture. In this
work, CAI operation is achieved in an engine with a
compression ratio of 11.6 running with gasoline-type
fuel.
While SI combustion is characterized by flame propagation
and associated fast chemical reactions in a
confined reaction zone, chemiluminescence imaging
studies [5] have shown that the CAI combustion process
could be described as a large reaction zone
resulting from an auto-ignition process which occurs
successively at various in-cylinder locations. The
mechanisms which promote auto-ignition involves
both thermal and chemical effects of the recycled burned
gases. While numerous studies have shown that
the heating effect is predominant [6,7], other investigations
emphasized the active role of chemical species
like CO, H2 and NO [8].

上一篇 在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位
下一篇 定量描述均质混合进气压缩燃烧（HCCI）发动机中燃烧过程的一种统计模型

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北京欧兰科技发展有限公司
金牌会员 丨 第17年
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