Time-domain CFD computation and analysis of acoustic attenuation performance of water-filled silencers

The multi-dimensional time-domain computational fluid dynamics (CFD) approach is extended to calculate the acoustic attenuation performance of water-filled piping silencers. Transmission loss predictions from the time-domain CFD approach and the frequency-domain finite element method (FEM) agree wel...

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Bibliographic Details
Published in:Journal of Central South University 2016-09, Vol.23 (9), p.2397-2401
Main Authors: Liu, Chen, Ji, Zhen-lin, Cheng, Yin-zhong, Liu, Sheng-lan
Format: Article
Language:English
Subjects:
Acoustic attenuation
Acoustics
Civil
Computational fluid dynamics
Computing time
Cross flow
Energy and Traffic Engineering
Engineering
Finite element method
Geological
Metallic Materials
Numerical prediction
Silencers
Time domain analysis
Transmission loss
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Summary:The multi-dimensional time-domain computational fluid dynamics (CFD) approach is extended to calculate the acoustic attenuation performance of water-filled piping silencers. Transmission loss predictions from the time-domain CFD approach and the frequency-domain finite element method (FEM) agree well with each other for the dual expansion chamber silencer, straight-through and cross-flow perforated tube silencers without flow. Then, the time-domain CFD approach is used to investigate the effect of flow on the acoustic attenuation characteristics of perforated tube silencers. The numerical predictions demonstrate that the mean flow increases the transmission loss, especially at higher frequencies, and shifts the transmission loss curve to lower frequencies.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-016-3298-3