27 0

Attenuation of Sounds in a Pipe with Shear Flow Using Layered Metamaterials

Title
Attenuation of Sounds in a Pipe with Shear Flow Using Layered Metamaterials
Author
박준홍
Keywords
Metamaterials; wave propagation; acoustic-structure interaction
Issue Date
2017-03
Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
Citation
JOURNAL OF COMPUTATIONAL ACOUSTICS, v. 25, no. 3, Article no. 1750008
Abstract
This study presents a simulation of interactions between sound and a surrounding pipe structure conveying fluid flows. A sound-attenuating structure using layered metamaterials of cylindrical shells is proposed and verified. Numerical simulations based on the finite difference method after considering steady fluid flow in the pipe were performed. The effective wave speed and density of the fluid required to determine acoustic characteristics were calculated from the transfer matrix method. This enabled estimation of noise reduction capability. The metastructure layers were lined parallel to the pipe walls to minimize flow resistance. The effective density was negative near the resonance frequency of the layers. The transmission loss predicted for a moving fluid medium was smaller than that for a stationary medium due to boundary layer formation. The proposed method can be used to design silencers to reduce the transmitted noise in pipe systems.
URI
https://www.worldscientific.com/doi/abs/10.1142/S0218396X17500084http://repository.hanyang.ac.kr/handle/20.500.11754/113192
ISSN
0218-396X; 1793-6489
DOI
10.1142/S0218396X17500084
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

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

BROWSE