柴油机微粒捕集器灰分分布对其压降的影响评价

doi:10.13229/j.cnki.jdxbgxb201706012

吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (6): 1760-1766.doi: 10.13229/j.cnki.jdxbgxb201706012

柴油机微粒捕集器灰分分布对其压降的影响评价

李志军¹, 何丽¹, 姜瑞^{1, 2}, 申博玺¹, 孔祥金¹, 刘世宇¹

1.天津大学内燃机燃烧学国家重点实验室,天津 300072;
2.北京宝沃汽车有限公司动力总成部,北京 101500

收稿日期:2016-07-13 出版日期:2017-11-20 发布日期:2017-11-20
作者简介:李志军(1962-),男,教授,博士生导师.研究方向:内燃机排放与控制.E-mail:zhijunli@tju.edu.cn
基金资助:
国家自然科学基金项目(51576140, 51276128); 科技部中欧中小企业节能减排发展专项基金项目(SQ2013ZOA100012)

Evaluation of influence of ash distribution on diesel particulate filter pressure drop

LI Zhi-jun¹, HE Li¹, JIANG Rui^{1, 2}, SHEN Bo-xi¹, KONG Xiang-jin¹, LIU Shi-yu¹

1.State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China;
2.Department of Powertrain,Beijing Borgward Automobile Co., Ltd.,Beijing 101500,China

Received:2016-07-13 Online:2017-11-20 Published:2017-11-20

摘要/Abstract

摘要： 通过建立灰分分布对柴油机微粒捕集器(DPF)压降影响的评价函数,分析了孔道壁面厚度、孔道直径、灰分量、碳烟量以及孔道壁面、灰分滤饼层、碳烟滤饼层渗透率等变量不同时,灰分分布对DPF压降的影响。研究结果表明:灰分滤饼层渗透率相对于孔道壁面、碳烟滤饼层渗透率的大小决定了DPF压降随灰分分布变化的趋势;当孔道壁面与灰分滤饼层的渗透率比值A=0.1、孔道壁面与碳烟滤饼层的渗透率比值S=2时,灰分分布于进口孔道壁面DPF压降小;当A=10、S=2时,灰分分布于进口孔道末端DPF压降小;孔道壁面厚度、孔道直径、灰分量、碳烟量能够改变灰分分布对DPF压降影响的程度;评价函数能够有效评价灰分分布对DPF压降的影响,也为不同情况下应用不同的DPF再生方式提供了参考。

关键词: 动力机械工程, 微粒捕集器, 灰分分布, 压降

Abstract: An evaluation function was established to analyze the influence of ash distribution on Diesel Particulate Filter (DPF) pressure drop. The variables in this function include the channel diameter, channel wall thickness, ash mass and the soot. Results show that the relative magnitude of ash, wall and soot permeability decides the trend of DPF pressure drop changing with the ash distribution. When the ratio of wall and ash permeability A= 0.1 and the ratio of wall and soot permeability S=2, the evaluation function is positive, and the DPF pressure drop is lower when ash locating on the wall of the inlet channel than the ash locating at the rear of the inlet channel, and passive regeneration is adopted. When A= 10 and S=2, the tendency reverses, and active regeneration is taken. Wall thickness, channel diameter, ash mass and soot mass affect the extent of the influence of ash distribution on DPF pressure drop.

Key words: power machinery and engineering, particulate filter, ash distribution, pressure drop

中图分类号:

TK421.5

李志军, 何丽, 姜瑞, 申博玺, 孔祥金, 刘世宇. 柴油机微粒捕集器灰分分布对其压降的影响评价[J]. 吉林大学学报(工学版), 2017, 47(6): 1760-1766.

LI Zhi-jun, HE Li, JIANG Rui, SHEN Bo-xi, KONG Xiang-jin, LIU Shi-yu. Evaluation of influence of ash distribution on diesel particulate filter pressure drop[J]. 吉林大学学报(工学版), 2017, 47(6): 1760-1766.

参考文献

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柴油机微粒捕集器灰分分布对其压降的影响评价

Evaluation of influence of ash distribution on diesel particulate filter pressure drop

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