吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (6): 1892-1899.doi: 10.13229/j.cnki.jdxbgxb201606018

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Numerical simulation for flow and pressure drop characteristics in asymmetrical channels of diesel particulate filter

LI Zhi-jun1, WANG Nan1, ZHANG Li-qiang2, HUANG Qun-jin1, WEI Suo-ku2, ZHANG Yan-ke1   

  1. 1.State Key Laboratory of Engine Combustion,Tianjin University,Tianjin 300072,China;
    2.Tianjin Shengwei Development of Science Co.,Ltd.,Tianjin 300132,China
  • Received:2015-06-22 Online:2016-11-20 Published:2016-11-20

Abstract: The 3D model of a Diesel Particulate Filter (DPF) with asymmetrical channels was established in Fluent. Based on numerical model, the fluid flow and pressure drop characteristics were simulated, the soot loading process was analyzed, and the pressure drops in asymmetrical channels and symmetrical channels were compared. The results show that, along the inlet channels, the flow velocity magnitude increases at first and then decreases, while the static pressure decreases first and then increases. Along the outlet channels the flow velocity increases while the static pressure decreases. At the beginning of soot loading process, larger amount of soot loading is found in the downstream half of the channel. As the soot loading increase, the distribution of soot along the axial direction becomes uniform. The pressure drop in the asymmetrical channels is lower than that in the symmetrical channels. The coefficient of the absolute soot loading of the asymmetrical channels is above 0.3. As the inlet-to-outlet ratio increases, the influence of the inlet mass flow rate on the pressure drop becomes more significant.

Key words: power machinery and engineering, diesel particulate filter(DPF), asymmetrical channel, flow, pressure drop

CLC Number: 

  • TK421.5
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