Study on evolution process of soot particles in diesel engine exhaust pipe

被引：0

作者：

Wei M. ^{[1
]}

Bian F. ^{[1
]}

Ju H. ^{[1
]}

机构：

[1] Hubei Key Laboratory of Advanced Technology for Automotive Components, Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan

来源：

Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2020年 / 48卷 / 02期

关键词：

Diesel engine; Exhaust pipe; Fractal dimension; Size distribution; Soot; Transmission electron microscope (TEM);

D O I：

10.13245/j.hust.200203

中图分类号：

学科分类号：

摘要：

Under different operating conditions of diesel engine, soot particles at different positions of exhaust pipes were collected.The morphology of soot particles was observed and photographed by transmission electron microscopy.Image-pro plus software was used to statistical analyze morphological characteristic parameter and the fractal dimension of soot particles was obtained by these parameters.The study comes to the following conclusions that the fractal dimension and size of soot particles gradually increase with the increase of the brake mean effective pressure (PBME), and its morphology develops from chain and branch to clusters and nets.Under the same PBME, the fractal dimension of the soot particles at the sampling point 2 is greater than that at the sampling point 1.It is indicated that the soot particles in the exhaust pipe are still changing through physical processes such as collision, polymerization and crushing, et al. © 2020, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.

引用

页码：11 / 15

页数：4

共 10 条

[1]

Frenklach M., Wang H., Detailed modeling of soot particle nucleation and growth, Symposium(Internat- Ional) on Combustion, 23, 1, pp. 1559-1566, (1991)

[2]

Kazzakov A., Frenklach M., Dynamic modeling of soot particle coagulation and aggregation: implemen- tation with the method of moments and application to high-pressure laminar premixed flames, Combustion and Flame, 114, 3-4, pp. 448-501, (1998)

[3]

Balthasar M., Frenklach M., Detailed kinetic modeling of soot aggregate formation in laminar premix- ed flames, Combustion and Flame, 140, 1-2, pp. 130-145, (2005)

[4]

Ho C.A., Sommerfeld M., Modelling of micro- particle agglomeration in turbulent flows, Chemical Engineering Science, 57, 15, pp. 3073-3084, (2002)

[5]

Lee K.O., Cole R., Sekar R., Et al., Morphological investigation of the microstructure, dimensions, and fractal geometry of diesel particulates, Proceedings of the Combustion Institute, 29, 2, pp. 647-653, (2002)

[6]

Lee K.O., Megaridis C.M., Zelepouga S., Et al., Soot formation effects of oxygen concentration in the oxidizer stream of laminar coannular nonpremixed methane/air flames, Combustion and Flame, 121, 1-2, pp. 323-333, (2000)

[7]

Kondo K., Takahashi J., Aizawa T., Morpholo- gy analysis of wall-deposited diesel soot particles via transmission electron microscope, SAE International Journal of Fuels and Lubricants, 7, 3, pp. 683-692, (2014)

[8]

Behzad R., Choongsik B., Morphology and nano- structure of soot in diesel spray and in engine exhaust, Fuel, 203, 5, pp. 47-56, (2017)

[9]

Kondo K., Aizawa T., Kook S., Et al., Uncertainty in sampling and TEM analysis of soot particles in diesel spray flame, SAE Technical Paper, pp. 1-9, (2013)

[10]

Brasil A.M., Farias T.L., Carvalho M.G., A recipe for image characterization of fractal-like aggregates, Journal of Aerosol Science, 30, 10, pp. 1379-1389, (1999)

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