| 柴油机颗粒捕集器内颗粒层不均匀分布的数值研究 |
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| 引用本文： | 孟忠伟,宋蔷.柴油机颗粒捕集器内颗粒层不均匀分布的数值研究[J].西华大学学报(自然科学版),2011,30(1):1-4,51. |
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| 作者姓名： | 孟忠伟 宋蔷 |
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| 作者单位： | 1. 西华大学交通与汽车工程学院,四川,成都,610039
2. 清华大学热能工程系,北京,100084 |
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| 基金项目： | 国家“九七三”重点基础研究项目(2002CB211600); 四川省教育厅科技创新团队(KYTD201003),四川省教育厅青年基金项目(10ZB078) |
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| 摘 要： | 针对壁流式柴油机颗粒捕集器捕集颗粒物的工作过程,建立了描述通道内流场和颗粒层分布的一维非稳态模型.通过数值计算,研究了壁面渗透系数不均匀对颗粒层分布和过滤压强的影响.研究结果表明:壁面渗透系数不均匀造成颗粒沉积高度的不均匀,渗透系数大的位置颗粒层沉积高度大.在相同的不均匀偏差条件下,平均壁面渗透系数越低,颗粒层高度的不...
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| 关 键 词： | 壁流式 柴油机颗粒捕集器 壁面渗透系数 过滤压降 |
Numerical Investigation into the Non-uniform Soot Layer Distribution in a Diesel Particle Filter |
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| MENG Zhong-wei,SONG Qiang.Numerical Investigation into the Non-uniform Soot Layer Distribution in a Diesel Particle Filter[J].Journal of Xihua University:Natural Science Edition,2011,30(1):1-4,51. |
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| Authors: | MENG Zhong-wei SONG Qiang |
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| Affiliation: | MENG Zhong-wei1,SONG Qiang2(1.School of Transportation and Automotive Engineering,Xihua University,Chengdu 610039 China,2.Department of Thermal Engineering,Tsinghua University,Beijing 100084 China) |
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| Abstract: | A one-dimensional unsteady model simulating the trapping process of fine particles by wall-flow filter was developed to simulate the flow field and particle layer distribution in a channel.Numerical simulation was conducted to investigate the influence of non-uniform distributed wall permeability of the filter on the particle layer distribution and filter pressure drop.The results showed that the non-uniform distributed wall permeability of filter caused the non-uniform distribution of soot layer,the positi... |
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| Keywords: | wall flow diesel particle filter wall permeability coefficient pressure drop |
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