Sound transmission through double cylindrical shells lined with porous material under turbulent boundary layer excitation
Sound transmission through double cylindrical shells lined with porous material under turbulent boundary layer excitation
This paper investigates sound transmission through double-walled cylindrical shell lined with poroelastic material in the core, excited by pressure fluctuations due to the exterior turbulent boundary layer (TBL). Biot?s model is used to describe the sound wave propagating in the porous material. Three types of constructions, bonded–bonded, bonded–unbonded and unbonded–unbonded, are considered in this study. The power spectral density (PSD) of the inner shell kinetic energy is predicted for two turbulent boundary layer models, different air gap depths and three types of polyimide foams, respectively. The peaks of the inner shell kinetic energy due to shell resonance, hydrodynamic coincidence and acoustic coincidence are discussed. The results show that if the frequency band over the ring frequency is of interest, an air gap, even if very thin, should exist between the two elastic shells for better sound insulation. And if small density foam has a high flow resistance, a superior sound insulation can still be maintained
253-268
Zhou, Jie
ea4ca5fc-7c95-4b68-824a-b16792fee77a
Bhaskar, Atul
d4122e7c-5bf3-415f-9846-5b0fed645f3e
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
24 November 2015
Zhou, Jie
ea4ca5fc-7c95-4b68-824a-b16792fee77a
Bhaskar, Atul
d4122e7c-5bf3-415f-9846-5b0fed645f3e
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Zhou, Jie, Bhaskar, Atul and Zhang, Xin
(2015)
Sound transmission through double cylindrical shells lined with porous material under turbulent boundary layer excitation.
Journal of Sound and Vibration, 357, .
(doi:10.1016/j.jsv.2015.07.014).
Abstract
This paper investigates sound transmission through double-walled cylindrical shell lined with poroelastic material in the core, excited by pressure fluctuations due to the exterior turbulent boundary layer (TBL). Biot?s model is used to describe the sound wave propagating in the porous material. Three types of constructions, bonded–bonded, bonded–unbonded and unbonded–unbonded, are considered in this study. The power spectral density (PSD) of the inner shell kinetic energy is predicted for two turbulent boundary layer models, different air gap depths and three types of polyimide foams, respectively. The peaks of the inner shell kinetic energy due to shell resonance, hydrodynamic coincidence and acoustic coincidence are discussed. The results show that if the frequency band over the ring frequency is of interest, an air gap, even if very thin, should exist between the two elastic shells for better sound insulation. And if small density foam has a high flow resistance, a superior sound insulation can still be maintained
Text
__soton.ac.uk_ude_PersonalFiles_Users_nr1n10_mydocuments_Computational Engineering_administration_eprints_Atul_1-s2.0-S0022460X15005878-main.pdf
- Other
Restricted to Repository staff only
Request a copy
More information
Accepted/In Press date: 9 July 2015
Published date: 24 November 2015
Organisations:
Computational Engineering & Design Group, Aerodynamics & Flight Mechanics Group
Identifiers
Local EPrints ID: 381980
URI: http://eprints.soton.ac.uk/id/eprint/381980
ISSN: 0022-460X
PURE UUID: 5850fb33-afa7-4d59-badf-3af2507ffc83
Catalogue record
Date deposited: 16 Oct 2015 14:43
Last modified: 14 Mar 2024 21:23
Export record
Altmetrics
Contributors
Author:
Jie Zhou
Author:
Xin Zhang
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics