摘要
Sound propagation properties of a duct system with Helmholtz resonators(HRs)are affected by mean flow.Previous studies have tended to focus on the effects of mean flows on acoustic response of a duct system with a finite number of HRs.Employing an empirical impedance model,we present a modified transfer matrix method for studying the effect of mean flow on the complex band structure of an air duct system with an infinite periodic array of HRs.The efficiency of the modified transfer matrix is demonstrated by comparison between an example of transmission response calculation for a finite single HR loaded duct and the finite element simulation result calculated using the COMSOL software.Numerical results are presented to analyze the effect of mean flow on the band structure and transmission loss of the sound wave in the duct system.It is hoped that this study will provide theoretical guidance for acoustic wave propagation of HR silencer in the presence of mean flow.
作者
Jiang-Wei Liu
Dian-Long Yu
Hai-Bin Yang
Hui-Jie Shen
Ji-Hong Wen
刘江伟;郁殿龙;杨海滨;沈惠杰;温激鸿(Laboratory of Science and Technology on Integrated Logistics Support,College of Intelligence Science and Technology,National University of Defense Technology,Changsha 410073;College of Power Engineering,Naval University of Engineering,Wuhan 430033)
基金
Supported by the National Natural Science Foundation of China(Grant Nos.11872371,51705529,11991032,and 11991034)。
