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| Experimental Investigation of Combustion Characteristics of Particulate Layers During Diesel Particulate Filter Regeneration |
| DOI：10.13949/j.cnki.nrjgc.2019.04.009 |
| Key Words:diesel particulate filter(DPF) particulate layer thickness soot deposition regeneration microcosmic structure |
| Author Name | Affiliation | | MENG Zhongwei, QIN Yuan, FANG Jia, JIANG Yuan, DU Yuheng, YANG Yan | 1.School of Automobile & Transportation, Xihua University, Chengdu 610039, China；
2.Key Laboratory of Fluid and Power Machinery of Education, Xihua University, Chengdu 610039, China |
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| Abstract:Based on a visual single-channel test bench, the thickness of particulate layer during regeneration process was measured online by laser displacement sensor. The morphology of the particulate layer was observed offline by scanning electron microscope. The particulate layer thicknesses of two soot particles during both deposition and regeneration processes were compared. The results show that the regeneration process can be divided into three stages based on the change of the particulate layer thickness. In the first stage, the thickness of the particulate layer decreases slowly. In the second stage, the thickness of the particulate layer declines rapidly. This attributes to the oxidation reaction that mainly occurrs at pores in the direction of the flow in a diesel particulate filter. As a result, the particulate layer surface has many irregular pits. In the third stage, the thickness of the particulate layer reduces slowly again. Meanwhile, the morphology of carbon black particles changes from a uniform structure to a chain-shaped one. The particulate layer gains pits as oxidation proceeds. |
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