带微粒过滤器的发动机排气噪声特性研究  

Study on Exhaust Noise Characteristics of Diesel Engine with Particulate Filter

作　　者：冯黎明[1] 高文志[1] 何国炜[2] 

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 [2]上海内燃机研究所,上海200438

出　　处：《内燃机工程》2011年第5期11-15,22,共6页Chinese Internal Combustion Engine Engineering

基　　金：天津市应用基础研究计划项目(05YFJMJC10700);国家"八六三"高技术研究发展计划项目(2009AA045103)

摘　　要：采用Sysnoise软件对简化的微粒过滤器模型进行了热态下的三维数值模拟计算,得到了微粒过滤器各部分传递矩阵。利用传递矩阵法计算了微粒过滤器热态下的插入损失,并在半消声试验室中搭建了发动机试验台架,测试了发动机在标定工况和怠速工况下微粒过滤器的插入损失,测试与计算结果的对比分析验证了声学模型的正确性。研究结果表明:微粒过滤器对高频排气噪声具有明显的衰减作用,黏性对噪声衰减也有较大的影响。To study effect of diesel particulate filter（DPF） on engine exhaust noise,a simplified three-dimensional DPF acoustical model was simulated numerically in engine operating conditions using Sysnoise software.By using obtained transfer matrix in DPF,the insertion loss in operating condition was calculated.On the engine test bed established in a half anechoic laboratory the DPF insertion loss was measured in rated and idling conditions.The comparison between experimental and calculated results confirms correctness of the model.Both two show that the DPF has a significant effect on high-frequency exhaust noise attenuation and viscosity plays a very important role in noise attenuation.

关 键 词：内燃机 柴油机微粒过滤器 传递矩阵 插入损失 黏性 

分 类 号：TK421.6[动力工程及工程热物理—动力机械及工程]