| Propagation and Attenuation Characteristics of Diesel Particulate Filter |
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| 作者姓名： | 高文志 宋崇林 刘建国 关顺吉 |
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| 作者单位： | [1]State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China |
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| 基金项目： | Supported by Natural Science Foundation of Tianjin （05YFJMJC10700）. |
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| 摘 要： | Diesel particulate filter （DPF） is an important factor which influences the sound from exhaust system of an engine. In order to underst and the propagation law of sound wave and predictthe insertion loss in DPF, based on the general aero-dynamic equations and Darcy＇s law, an acoustic property calculation model of DPF is constructed. Propagation and attenuation characteristics of the forward and backward propagating acoustic waves in the close and open pipe of the filter are investigated. The theoretical model is combined with experiment to investigate sound attenuation property of DPF. The insertion loss obtained from the experiment is compared with that computed for a DPF. The results from the experiment and theoretical calculation agree well.
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| 关 键 词： | 柴油机 微粒过滤器 燃烧过程 排气系统 |
| 收稿时间： | 2005-03-03 |
Propagation and Attenuation Characteristics of Diesel Particulate Filter |
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| Gao Wenzhi,SONG Chonglin,LIU Jianguo,GUAN Shunji.Propagation and Attenuation Characteristics of Diesel Particulate Filter[J].Transactions of Tianjin University,2005,11(4):278-282. |
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| Authors: | Gao Wenzhi SONG Chonglin LIU Jianguo GUAN Shunji |
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| Abstract: | Diesel particulate filter (DPF) is an important factor which influences the sound from exhaust system of an engine. In order to understand the propagation law of sound wave and predict the insertion loss in DPF, based on the general aero-dynamic equations and Darcy′s law, an acoustic property calculation model of DPF is constructed. Propagation and attenuation characteristics of the forward and backward propagating acoustic waves in the close and open pipe of the filter are investigated. The theoretical model is combined with experiment to investigate sound attenuation property of DPF. The insertion loss obtained from the experiment is compared with that computed for a DPF. The results from the experiment and theoretical calculation agree well. |
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| Keywords: | diesel particulate filter acoustic characteristics insertion loss propagation constant |
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