Effects of Intake Pressure on the Morphology of In-Cylinder Diesel Soot Particles

被引：0
|
作者：
Zhang R. [1 ]
Fan C. [1 ]
Lyu G. [1 ]
Li Y. [1 ]
Zhang W. [1 ]
Song C. [1 ]
机构：
[1] State Key Laboratory of Engines, Tianjin University, Tianjin
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2021年 / 39卷 / 02期
关键词：
Diesel engine; Fractal dimension; Intake pressure; Morphology; Primary soot particles;
D O I：
10.16236/j.cnki.nrjxb.202102016
中图分类号：
学科分类号：
摘要：
The soot particles during the diesel combustion process were collected using a full in-cylinder sampling system. A transmission electron microscope(TEM)was used to obtain the 2-D images of the soot samples, which were digitized to acquire the fractal dimension of soot particles and the diameter of primary soot particles. Based on the information obtained, the effect of intake pressure on the morphology of in-cylinder soot particles was investigated. Results show that the increase of intake pressure results in larger average diameter of the primary soot particles during soot formation-dominated period. However, the primary particle diameter rapidly decreases during the soot oxidation-dominated period due to the enhanced soot oxidation reactions by the increase of intake pressure. The increase of intake pressure exerts no significant influence on the average diameter of primary soot particles in the exhaust. During soot oxidation-dominated period, the fragmentation of soot particles results in a decrease in fractal dimensions, while such a decrease is advanced when increasing the intake pressure. © 2021, Editorial Office of Chinese I.C.E. Engineering. All right reserved.
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页码：123 / 129
页数：6
相关论文
共 35 条
  • [1] Michelsen H A., Probing soot formation, chemical and physical evolution, and oxidation: A review of in situ diagnostic techniques and needs, Proceedings of the Combustion Institute, 36, pp. 717-735, (2017)
  • [2] Amin H M, Bennett A, Roberts W L., Determining fractal properties of soot aggregates and primary particle size distribution in counterflow flames up to 10 atm, Proceedings of the Combustion Institute, 37, 1, pp. 1161-1168, (2019)
  • [3] Ghiassi H, D'Anna A, Lighty J S, Et al., Temperature and oxygen effects on oxidation-induced fragmentation of soot particles, Combustion and Flame, 171, pp. 15-26, (2016)
  • [4] Xu Z, Li X, Guan C, Et al., Effects of injection timing on exhaust particle size and nanostructure on a diesel engine at different loads, Journal of Aerosol Science, 76, pp. 28-38, (2014)
  • [5] Lapuerta M, Oliva F, Agudelo J R, Et al., Effect of fuel on the soot nanostructure and consequences on loading and regeneration of diesel particulate filters, Combustion and Flame, 159, 2, pp. 844-853, (2012)
  • [6] Ghiassi H, Toth P, Jaramillo I C, Et al., Soot oxidationinduced fragmentation: Part 2: Experimental investigation of the mechanism of fragmentation, Combustion and Flame, 163, pp. 170-178, (2016)
  • [7] (2016)
  • [8] Tree D R, Svensson K I., Soot processes in compression ignition engines, Progress in Energy and Combustion Science, 33, 3, pp. 272-309, (2007)
  • [9] Kim J, Jang J, Lee K., Combustion and emissions characteristics of diesel and soybean biodiesel over wide ranges of intake pressure and oxygen concentration in a compression-ignition engine at a light-load condition, Fuel, 129, pp. 11-19, (2014)
  • [10] Song J A, Boehman M, Kim A, Et al., Examination of the oxidation behavior of biodiesel soot, Combustion and Flame, 146, pp. 589-604, (2006)
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