Measurement of temperature, fuel concentration and equivalence ratio fields using tracer LIF in IC engine combustion
Measurement of temperature, fuel concentration and equivalence ratio fields using tracer LIF in IC engine combustion
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DOI：
10.1007/s003400000383
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
S. Einecke;Christof Schulz;Volker Sick
中科院分区：
文献类型：
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作者：
S. Einecke;Christof Schulz;Volker Sick
提出了一种基于3-戊酮平面激光诱导荧光的技术，用于测量湍流、高压燃烧系统（如内燃机）中的绝对浓度、温度和燃料/空气当量比。准同时激发与248 nm和308 nm的3-戊酮，用作荧光示踪剂掺杂到异辛烷，产生对强烈的温度依赖性的荧光图像。以前的调查结果的吸收截面和荧光量子产率的温度和压力依赖性的信息。使用这些数据，可以将相应荧光图像的比率转换为温度图像。测量了某点燃式发动机压缩冲程和未燃端气的瞬态温度场。使用两线技术获得的温度场来校正原始示踪剂激光诱导荧光图像，以便根据数密度和燃料/空气当量比来评估定量燃料分布。
A technique based on planar laser-induced fluorescence of 3-pentanone, for measurements of absolute concentration, temperature and fuel/air equivalence ratios in turbulent, high-pressure combustion systems such as an internal combustion engine is presented. Quasi-simultaneous excitation with 248 nm and 308 nm of 3-pentanone that is used as a fluorescence tracer doped to iso-octane, yields pairs of strongly temperature-dependent fluorescence images. Previous investigations have resulted in information on temperature and pressure dependence of absorption cross-sections and fluorescence quantum yields. Using these data the ratio of corresponding fluorescence images can be converted to temperature images. Instantaneous temperature distribution fields in the compression stroke and in the unburned end-gas of an SI engine were measured. The temperature fields obtained from the two-line technique are used to correct the original tracer-LIF images in order to evaluate quantitative fuel distributions in terms of number densities and fuel/air equivalence ratio.