Propagation and Attenuation Characteristics of Diesel Particulate Filter

GAO Wenzhi; SONG Chonglin; LIU Jianguo

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Propagation and Attenuation Characteristics of Diesel Particulate Filter

机译：柴油机颗粒过滤器的传播和衰减特性

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Diesel participate 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.

机译：柴油滤清器（DPF）是影响发动机排气系统声音的重要因素。为了了解声波的传播规律并预测DPF的插入损耗，基于一般的空气动力学方程和达西定律，构造了DPF的声学特性计算模型。研究了过滤器的封闭和敞开管道中向前和向后传播的声波的传播和衰减特性。理论模型与实验相结合，研究了DPF的声衰减特性。将实验获得的插入损耗与DPF计算的插入损耗进行比较，实验结果与理论计算结果吻合良好。

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来源
《Transactions of Tianjin University》 |2005年第4期|p.278-282|共5页
作者
GAO Wenzhi; SONG Chonglin; LIU Jianguo;
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作者单位

State Key Laboratory of Engines, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China;

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原文格式 PDF
正文语种 eng
中图分类自然科学总论;
关键词
diesel particulate filter; acoustic characteristics; insertion loss; propagation constant;

机译：柴油机颗粒过滤器;声学特性;插入损耗;传播常数;

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Propagation and Attenuation Characteristics of Diesel Particulate Filter

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