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仪器网/ 行业应用/ 解决方案/ 测量区域对初级柴油尾气颗粒排放物的瞬态激光诱导白炽光

测量区域对初级柴油尾气颗粒排放物的瞬态激光诱导白炽光

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Laser-induced incandescence can be applied to raw exhaust at the open tailpipe, or along the exhaust train using either an in situ optical cell or by extractive sam-p领 to an external cell. While in situ measurements are preferable to avoid artifacts caused by extractive sam-p领, the experimental setup may be complex and thus more expensive to implement. In this paper we make a direct comparison of time-resolved in situ versus ex-tracted-sample measurements for rapid engine tran-sients of load and speed. In addition, we compare meas-urements for exhaust extracted from three different loca-tions: 1) at the turbocharger output; 2) at the muffler entrance; 3) at the muffler exit. The results show that extractive samp领 sufficiently replicates in situ meas-urements obtained at the muffler entrance, and that rapid transients in soot concentration vary to a small but detectable degree with the measurement location. 汽车发动机多参量测试系统 激光诱导白炽光烟雾粒子成像分析仪(LII)
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