[1]张韦,孙富贤,陈朝辉,等.柴油机DPF孔道内积碳层的运动及分布特性[J].内燃机学报,2023,(01):77-85.
　Zhang Wei,Sun Fuxian,Chen Zhaohui,et al.Characteristics of Transport and Distribution of Soot Cake in DPF Channel of Diesel Engine[J].,2023,(01):77-85.
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柴油机DPF孔道内积碳层的运动及分布特性
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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2023年01
页码:
77-85
栏目:
出版日期:
2023-01-25

文章信息/Info

Title:
Characteristics of Transport and Distribution of Soot Cake in DPF Channel of Diesel Engine
作者:
张韦; 孙富贤; 陈朝辉; 陈永
1. 昆明理工大学 云南省内燃机重点实验室，云南 昆明 650500； 2. 昆明云内动力股份有限公司，云南 昆明 650200
Author(s):
Zhang Wei; Sun Fuxian; Chen Zhaohui; Chen Yong
1. Yunnan Key Laboratory of Internal Combustion Engine，Kunming University of Science and Technology， Kunming 650500，China；2. Kunming Yunnei Power Company Limited，Kunming 650200，Chi
关键词:
柴油机; 柴油机颗粒捕集器; 孔道; 积碳层; 分布
Keywords:
diesel engine; diesel particulate filter; channel; soot cake; distribution
分类号:
TK442
文献标志码:
A
摘要:
为研究碳积层对柴油机颗粒捕集器(DPF)堵塞失效的影响，采用连续流体介质与固体颗粒层离散元耦合的 方法，结合DPF 可视化试验加以验证，研究DPF 孔道内不同形状、尺寸和厚度的积碳层运动以及分布．结果表 明：积碳层表面积越大，发生拥塞的位置越靠近孔道后段；圆形轮廓的积碳层易于相互堆叠，三角形轮廓的积碳 层拥塞段会集中于孔道中段，正方形轮廓的积碳层拥塞段的结构较为稳定．积碳层长度与DPF 进口孔径比例为0.5 时，拥塞段的密度与长度会明显增加，但是拥塞段的稳定性会降低．随着积碳层厚度增加，拥塞段的位置会靠近 孔道前段．
Abstract:
In order to study the effect of the soot cake on channel clogging of a diesel particle filter(DPF)，a study of transport and distribution of the soot cake in different shapes，sizes and thicknesses in the DPF channel was conducted by using the method of coupling continuous fluid medium and solid particle layer discrete element， combined with DPF visualization experiment. The results show that the larger the surface area of the soot cake，the closer the congestion occurs to the back section of the channel. The soot cake with circular contour is easy to stack on each other，the congestion segment of the soot cake with triangular contour is concentrated in the middle section of the channel，and the structure of the congestion segment of the soot cake with square contour is more stable. When the ratio of soot cake length to DPF inlet aperture is 0.5，the density and length of the congestion segment increase obviously，but the stability of the congestion segment decreases. As the thickness of the soot cake increases， the position of the congested section is closer to the front section of the channel.

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更新日期/Last Update: 2023-01-25