Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43834
Title: On the acoustic analysis and optimization of ducted ventilation systems using a sub-structuring approach
Authors: Yu, X
Cui, FS
Cheng, L 
Issue Date: 2016
Publisher: Acoustical Society of America
Source: Journal of the Acoustical Society of America, 2016, v. 139, no. 1, p. 279-289 How to cite?
Journal: Journal of the Acoustical Society of America 
Abstract: This paper presents a general sub-structuring approach to predict the acoustic performance of ducted ventilation systems. The modeling principle is to determine the subsystem characteristics by calculating the transfer functions at their coupling interfaces, and the assembly is enabled by using a patch-based interface matching technique. For a particular example of a bended ventilation duct connecting an inlet and an outlet acoustic domain, a numerical model is developed to predict its sound attenuation performance. The prediction accuracy is thoroughly validated against finite element models. Through numerical examples, the rigid-walled duct is shown to provide relatively weak transmission loss (TL) across the frequency range of interest, and exhibit only the reactive behavior for sound reflection. By integrating sound absorbing treatment such as micro-perforated absorbers into the system, the TL can be significantly improved, and the system is seen to exhibit hybrid mechanisms for sound attenuation. The dissipative effect dominates at frequencies where the absorber is designed to be effective, and the reactive effect provides compensations at the absorption valleys attributed to the resonant behavior of the absorber. This ultimately maintains the system TL at a relatively high level across the entire frequency of interest. The TL of the system can be tuned or optimized in a very efficient way using the proposed approach due to its modular nature. It is shown that a balance of the hybrid mechanism is important to achieve an overall broadband attenuation performance in the design frequency range.
URI: http://hdl.handle.net/10397/43834
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.4939785
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

2
Last Week
0
Last month
Citations as of Sep 25, 2017

WEB OF SCIENCETM
Citations

2
Last Week
0
Last month
Citations as of Sep 21, 2017

Page view(s)

27
Last Week
2
Last month
Checked on Sep 24, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.