计及气流的同轴穿孔管排气消声器消声性能的研究

A Study on Acoustic Performance of the Axial Perforated Pipe Exhaust Muffler Considering the Stream

基于传递矩阵法,推导基本传递矩阵建立数学模型,运用Matlab数学编程软件编制程序,仿真计算了轴向穿孔管消声器的插入损失随频率、结构参数变化的三维图以及气流速度和温度对消声性能影响的三维图,仿真结果表明:穿孔率、穿孔管壁厚、气流速度和温度对消声器消声性能有着重要影响,这对消声器设计及改进有着重要的指导意义。

Based on the transmission matrix technique, the mathematical model of the axial perforated pipe exhaust muffler was establised. The axial perforated pipe silencer insertion loss with the frequency, the design parameter change graphic model as well as the stream velocity and the temperature to the noise elimination performance influence graphic model was simulated using MATLAB. The simulation result indicated that the perforation rate ,perforated pipe wall thickness,the stream velocity and the temperature have a quite important influence to the noise elimination performance.