On particulate characterization in a heavy-duty diesel engine by time-resolved laser-induced incandescence
On particulate characterization in a heavy-duty diesel engine by time-resolved laser-induced incandescence
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通过时间分辨激光诱导白炽光对重型柴油发动机中的颗粒进行表征
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
J. J. Meulen
中科院分区：
文献类型：
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作者：
B. Bougie;B. Bougie;L. Ganippa;L. Ganippa;N. Dam;J. J. Meulen
在一台低负荷、燃用普通柴油的重型柴油机燃烧室内进行了时间分辨激光诱导白炽度(TRLII)测量。LII轨迹根据初级颗粒大小进行了解释，比较了两种不同的假设颗粒尺寸分布：单分散分布和对数正态分布。粒子的初始温度(紧接在激光脉冲之后)由双色测温仪估计。我们的结论是，粒子的初始温度对(平均)半径的拟合过程的结果并不是非常关键。在发动机的高压条件下，LII强度的时间依赖性包含了足够的结构，可以恢复颗粒尺寸分布的细节。
Time-resolved laser-induced incandescence (TR-LII) measurements have been performed inside the combustion chamber of a heavy-duty diesel engine running at low load and with regular diesel fuel. The LII traces were interpreted in terms of primary particle sizes, comparing two different assumed particle-size distributions: a mono-disperse and a log-normal distribution. The initial temperature of the particles (immediately after the laser pulse) is estimated by two-color pyrometry. We conclude that the initial temperature of the particles is not very critical for the outcome of the fitting procedure for the (mean) radius. Under the high-pressure conditions in the engine, the time dependence of the LII intensity contains sufficient structure to allow retrieval of details of the particle-size distribution.