筒式催化净化消声器声学性能试验与仿真分析  

Test and Simulation Analysis of Acoustic Performance on Cylindrical Catalytic Purification Muffler

作　　者：王武林 张旭东 冒兴峰 陆兆纳 WANG Wu-lin;ZHANG Xu-dong;MAO Xing-feng;LU Zhao-na(Nantong Institute of Technology, Nantong 226019, China)

机构地区：[1]南通理工学院,江苏南通226019

出　　处：《廊坊师范学院学报（自然科学版）》2018年第1期33-36,41,共5页Journal of Langfang Normal University(Natural Science Edition)

基　　金：2016年南通市港闸区科技创新及产业化计划项目(2016D112)

摘　　要：为研究筒式催化净化消声器结构参数对声学性能的影响,在不同转速下对不同方案的净化消声器进行了排气声学性能的试验和仿真研究。用现有某柴油发动机筒式催化净化消声器,在不改变现有催化净化单元的基础上,借鉴乘用车辅助消声器的设计理念,从消声单元的容积、消声管直径及长度方面提出了三种改进方案,以提升筒式催化净化消声器的声学性能。GT-Power软件尾管噪声仿真与发动机台架插入损失试验结果表明:增大容积、减小消声管管径均能够降低尾管的阶次噪声,同时增大消声管管径可以降低气流再生噪声。In order to research the influence of the structure parameters of cylinder catalytic purification muffler to the acoustic properties,the simulation and test about exhaust acoustic performance of different design schemes was carried out at different engine speeds.Based on the existing diesel engine cylinder type catalytic converter without changing the existing catalytic purification unit,from the design concept of passenger car auxiliary muffler,three improved scheme is put forward from the basic unit volume,muffler pipe diameter and length to improve acoustic performance of cylinder type catalytic purification muffler.The results of GT-Power software tail tube noise simulation and engine bench insertion loss testing show that increasing the volume and reducing the diameter of the muffler pipe can reduce the harmonic noise of the tailpipe and increase the diameter of the muffler tube,which can reduce the airflow regeneration noise.

关 键 词：净化消声器 声学性能 实验 仿真 

分 类 号：U464[机械工程—车辆工程]