Effects of Carrier Ratio and Ash Distribution on DPF Pressure Drop and Internal Flow Field Characteristics

被引：0
|
作者：
Chen G. [1 ]
He R. [1 ]
Li Q. [1 ]
Peng Y. [2 ]
Zhang S. [3 ]
Li Y. [1 ]
机构：
[1] Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming
[2] Kunming Yunnei Power Company Limited, Kunming
[3] Yunnan Yunnei Power Machinery Manufacturing Company Limited, Kunming
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2022年 / 40卷 / 01期
关键词：
Ash content distribution; Carrier ratio; Diesel engine particulate filter; Inner flow field; Particle deposition;
D O I：
10.16236/j.cnki.nrjxb.202201009
中图分类号：
学科分类号：
摘要：
Based on a test bench of D30 TCI diesel engine coupled with oxidation catalyst(DOC)and diesel engine particle filter(DPF), the DPF pressure drop of three different structures of DPF were tested. A one-dimensional simulation model and a three-dimensional quarter channel model of DPF were constructed to study the effects of carrier ratio and carrier mesh number on characteristics of DPF pressure drop and trapping, and the effects of carrier ratio and ash deposition on flow movement and particle deposition characteristics inside DPF channels. The results show that under the same DPF ratio, increasing the number of carrier mesh can reduce the pressure drop, and increasing ash content can improve the effect. Increasing the DPF ratio is beneficial to reducing the DPF pressure drop and improving the collection efficiency. Considering the cost and performance, the optimal range of the carrier ratio(1.2-1.5)makes the DPF pressure drop and the collection efficiency to be optimal. The ash loading doesn't affect the influence of the ratio on the DPF pressure drop. When there is no ash, the outlet pressure of DPF decreases uniformly along the axial direction of DPF. When there is ash deposition, increasing the ash distribution coefficient can improve the collection efficiency, and the particle concentration in the inlet channel increases, and increasing DPF ratio can improve the effect. © 2022, Editorial Office of the Transaction of CSICE. All right reserved.
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页码：71 / 79
页数：8
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