柴油机微粒过滤器的声学模型及热态声特性  

Sound Model and Thermal Sound Characteristics of Diesel Particulate Filter

作　　者：高文志[1] 冯黎明[1] 王辉[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《机械工程学报》2008年第6期213-218,共6页Journal of Mechanical Engineering

基　　金：天津市应用基础研究计划资助项目(05YFJMJC10700)

摘　　要：探讨了柴油机微粒过滤器三维声学模型的简化方法,利用Sysnoise软件对简化模型进行热态下的三维数值模拟计算,得到微粒过滤器的传递矩阵。采用传递矩阵法计算微粒过滤器热态下的插入损失。在半消声实验室中搭建发动机试验台架,测试发动机标定点下微粒过滤器的插入损失。测试结果与计算结果对比分析验证了声学模型的合理性,可为优化设计微粒过滤器提供必要的理论依据。The method of simplifying the three-dimensional acoustical model of diesel particulate filter （DPF） is discussed, then the simplified model is put into Sysnoise to do the acoustical analysis in operating condition and the transfer matrix of DPF is found. By using the transfer matrix method the insertion loss in operating condition can be calculated. In an half an echoic laboratory the engine testbed is established, the insertion loss of DPF is measured in the operating condition. The comparison between experimental and calculating results demonstrates the correctness of the acoustical modal, providing theory basis of optimizing the DPF design.

关 键 词：柴油机微粒过滤器 传递矩阵 插入损失 热态 

分 类 号：TB533[理学—物理]