火花塞引燃发动机中采用双线原子荧光方法的准瞬态二维温度测量

2017/09/08   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 可靠性能>温度试验
参考标准 暂无

采用LaVision以增强型CCD相机为核心器件构成的PLIF测试系统，根据双线原子激光诱导荧光原理，测量分析发动机内部的准瞬态二维温度场。

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Two-dimensional thermometry by the two-line atomic fluorescence method (TLAF) from atomic indium
performed in an internal combustion engine is reported for the first time. The engine was a modified
production engine running on iso-octane fuel. Small quantities of atomized indium were admitted to the
engine chamber by injecting solutions containing InCl3 mixed with iso-octane. Temperatures could be
measured over the entire combustion cycle covering a range from 800 to 2800 K at pressures up to 14
bar. A precision of 14% on single-shot temperature distributions was obtained, a figure that is expected to
be much improved if laser intensity profile normalization is performed on a shot-by-shot basis and not, as
in the present case, on averaged intensity profiles. Advantages of the technique are its sensitivity over a
large temperature range, its insensitivity to collisional quenching processes, the small laser powers required,
and the possibility to use wavelengths at which interferences from native flame species, such as small
hydrocarbons, are low. Limitations are discussed, and comparisons with other techniques are made.

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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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