Development of semi-empirical soot emission model for a CI engine

Lee, Youngbok; Lee, Yong-Joo; Moon, Sun-Young; Lee, Seung-Ha; Roh, Young-Jun; Min, Kyoungdoug

doi:10.1016/j.scitotenv.2022.153327

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…However, the difference on soot particle size between the sampling points 2a and 2b was small. To further compare the effects of temperature on the morphologies of soot particles, the measurement method proposed by Brasil et al [10,11] was used to calculate the fractal dimensions of soot particles. Figure 7 shows the change in the soot particle fractal dimension with the loads.…”

Section: Morphologies Of Soot Particlesmentioning

confidence: 99%

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Effect of Temperature on Morphologies and Microstructures of Soot Particles in the Diesel Exhaust Pipe

et al. 2023

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Insulating cotton was used to change the airflow temperature in the exhaust pipe of a diesel engine, and soot particles at different positions in the exhaust pipe under different operating conditions were collected. The morphologies and microstructures of soot particles were observed by high-resolution transmission electron microscopy (HRTEM). The characteristic parameters, including the mean primary particle diameter (dp), radius of gyration of soot aggregate (Rg), fractal dimension of soot particle (Df), carbon layer spacing (Ds), and carbon layer torsion resistance (Tf), were statistically analyzed. The changes in each characteristic parameter before and after adding insulating cotton were compared. After installing the cotton, soot particles still grew through surface chemical reactions and physical processes in the diesel exhaust pipe, the agglomeration becomes more and more prevalent, the particle size increased, and Df increased. The increase in the airflow temperature in the exhaust pipe promoted the surface growth of primary soot particles and enhanced the turbulence, which made the chain-like soot particles more likely to reunite under the action of turbulent eddies. Consequently, Rg decreased and Df increased. Furthermore, the average Ds and Tf of primary soot particles deceased, especially under high loads. This indicated that the increase in the temperature of the exhaust pipe was conducive to the graphitization of primary soot particles.

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Section: Morphologies Of Soot Particlesmentioning

confidence: 99%

“…The structure of soot particles is very complex, as they are fractal-like agglomerates of tens to hundreds of primary particles 10-50 nm in diameter [8][9][10]. Soot particles have a variety of different shapes, such as: spheroidal, ellipsoidal, linear, and branched [11].…”

Section: Introductionmentioning

confidence: 99%