Effects of Inlet/Outlet Ducts on Acoustic Attenuation Characteristics of Circular Expansion Chambers

被引：1
|
作者：
张宏波 [1 ]
葛蕴珊 [1 ]
季振林 [2 ]
张文平 [2 ]
宋艳冗 [1 ]
韩秀坤 [1 ]
张学敏 [1 ]
机构：
[1] School of Mechanical and Vehicular Engineering, Beijing Institute of Technology,Beijing 100081, China
[2] School of Power and Nuclear Engineering, Harbin Engineering University, Harbin 150001, China
来源：
Journal of Beijing Institute of Technology(English Edition) | 2006年 / 03期
关键词：
three-dimensional; acoustic performance; chamber;
D O I：
10.15918/j.jbit1004-0579.2006.03.001
中图分类号：
TB5 [声学工程];
学科分类号：
0702 ; 070206 ;
摘要：
The effect of coaxial, offset and extended inlet/outlet on the acoustic attenuation characteristics of circular expansion chambers are studied by the three-dimensional finite element method. The numerical results of transmission loss are compared with experiment results to verify the necessary of using three-dimensional methods. Maps of acoustic pressure level distribution inside of chambers and inlet/outlet ducts are given at a frequency to demonstrate the difference of acoustic wave propagation behavior caused by locations of inlet/outlet ducts. For the chambers of the same length, the chamber with extended inlet/outlet duct has higher attenuation ability than coaxial and offset inlet/outlet duct over middle frequencies.
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页码：253 / 257
页数：5
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