CFD analysis of a transfer matrix of exhaust muffler with mean flow and prediction of exhaust noise

作     者：Lian-yun LIU Zhi-yong HAO Chi LIU 

作者机构：Department of Energy EngineeringZhejiang UniversityHangzhou 310027China 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2012年第13卷第9期

页      面：709-716页

核心收录：

学科分类：080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

主　　题：Computational fluid dynamics (CFD) Transfer matrix Mean flow Acoustical source Exhaust noise 

摘      要：A multi-dimensional computational fluid dynamics(CFD) approach was proposed in this study aiming to calculate the transfer matrix of an engine exhaust muffler in the conditions with and without mean *** CFD model of the muffler with absorptive material defined as porous zone was calibrated with the measured noise reduction without mean flow,and was further employed to study the effect of the mean flow on the acoustic performance of the ***,the exhaust acoustical source was derived from the calculated transfer matrices of six different additional acoustic loads obtained by the proposed CFD approach as well as the measured tail noise based on a multiload least squares ***,the exhaust noise was predicted based on Thevenin s *** proposed CFD approach was suggested to be able to predict the acoustic performance of a complex muffler considering mean flow(without and with mean flow) and heat transfer,and provide reasonable results of the exhaust noise.