Analytical approach for sound attenuation in perforated dissipative silencers with inlet/outlet extensions

被引：30
|
作者：
Selamet, A [1 ]
Xu, MB
Lee, IJ
Huff, NT
机构：
[1] Ohio State Univ, Ctr Automat Res, Dept Mech Engn, Columbus, OH 43210 USA
[2] Owens Corning, Novi, MI 48377 USA
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2005年 / 117卷 / 04期
关键词：
D O I：
10.1121/1.1867884
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The acoustic attenuation performance of perforated dissipative circular expansion chambers with inlet/outlet extensions is investigated. The eigenvalues and eigenfunctions of the sound field are analytically determined in the extended inlet/outlet circular ducts, upstream/downstream end annular dissipative chambers, and the central perforated dissipative expansion chamber. Utilizing the continuity conditions of velocity/pressure at the interfaces, the transmission loss is predicted by a two-dimensional analytical approach. For a specific configuration, such predictions are compared with both experiments and a three-dimensional computational solution based on the substructure boundary element technique, showing a reasonable agreement. The analytical results for the effect of the absorbent resistivity, duct porosity, and geometry on the acoustic attenuation performance are discussed in detail. (c) 2005 Acoustical Society of America.
引用
收藏
页码：2078 / 2089
页数：12
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