使用两种不同的激发态化合物做示踪物和模型燃料，采用光谱学方法研究直喷汽油发动机中燃料混合物的形成

2017/09/08   下载量： 6 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 热性能>燃烧特性
参考标准 暂无

采用由LaVision公司的增强型CCD像机为核心构成的平面激光诱导荧光PLIF测试系统，用激发态复合物Exciplex作为示踪粒子，分析研究汽车发动机燃料混合物的制备过程特别是喷雾气液两相转化过程。

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In this work we study mixture preparation inside the cylinder of an optically accessible DI gasoline-engine. Crank
angle resolved investigation of the atomization process of different model-fuels is carried out by means of planar
Mie-scattering. The vaporization of the liquid fuel and the transport processes inside the cylinder are studied by
planar Laser-Induced-Exciplex-Fluorescence (PLIEF) using two different exciplex-systems and two different
model-fuels. Besides the standard mono-component model fuel isooctane a newly developed multi component fuel
(MCF) was examined. It represents the boiling curve of standard gasoline quite well and shows nearly the same
spectroscopic characteristics as isooctane. The crank angle resolved liquid and vapor distributions for a stratified and
a homogeneous operation mode are visualized for both model fuels and both exciplex-tracers. Furthermore cyclic
variations of vaporized fuel distributions near the spark plug are investigated. Simultaneous detection of the incylinder
pressure allowed the correlation between the fuel vapor distribution near the spark plug and the combustion
quality of this air-fuel-mixture. The corrected intensity values of the fluorescence emissions of the two exciplexsystems
TMPD/naphthalene and TEA/benzene were compared under same operation conditions.

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 均质混合进气直喷汽油发动机中燃料和空气的混合

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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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