Acoustic behaviour of an aperture backed by sound-absorbing materials under grazing flow
Acoustic behaviour of an aperture backed by sound-absorbing materials under grazing flow
The acoustic behaviour of an aperture backed by sound-absorbing material under grazing flow is theoretically investigated through a linearized model. Both the dissipation effect of the material and its influence on the stability of the vortex sheet over the aperture region are formally taken into account. And thus, the coupling effect between the material and the grazing flow is considered. In the situation that the size of the aperture is considerably smaller than the shear layer thickness, the model uses the particle velocity match (PVM). The predictions of the present PVM model achieve satisfactory agreement with published experimental data. On the other hand, while the relatively thin shear layer is considered, the model is based on the rigorous particle displacement match (PDM) and predicts when the acoustic energy is possibly extracted from the mean flow.
Acoustic impedance, Dissipative silencer, Grazing flow effect, Perforated plate, Sound-absorbing material
73-90
Meng, Yang
da00d8a9-6a60-426b-90e2-90d77d5190c8
Wu, Long
9787473b-a81a-47ce-a696-22afa8c2204b
Jing, Xiaodong
9bd7313a-4ab2-4387-839e-4c1583f61531
Sun, Xiaofeng
87a75751-8d01-440e-a234-02d4a6436ef6
28 April 2019
Meng, Yang
da00d8a9-6a60-426b-90e2-90d77d5190c8
Wu, Long
9787473b-a81a-47ce-a696-22afa8c2204b
Jing, Xiaodong
9bd7313a-4ab2-4387-839e-4c1583f61531
Sun, Xiaofeng
87a75751-8d01-440e-a234-02d4a6436ef6
Meng, Yang, Wu, Long, Jing, Xiaodong and Sun, Xiaofeng
(2019)
Acoustic behaviour of an aperture backed by sound-absorbing materials under grazing flow.
Journal of Sound and Vibration, 446, .
(doi:10.1016/j.jsv.2019.01.018).
Abstract
The acoustic behaviour of an aperture backed by sound-absorbing material under grazing flow is theoretically investigated through a linearized model. Both the dissipation effect of the material and its influence on the stability of the vortex sheet over the aperture region are formally taken into account. And thus, the coupling effect between the material and the grazing flow is considered. In the situation that the size of the aperture is considerably smaller than the shear layer thickness, the model uses the particle velocity match (PVM). The predictions of the present PVM model achieve satisfactory agreement with published experimental data. On the other hand, while the relatively thin shear layer is considered, the model is based on the rigorous particle displacement match (PDM) and predicts when the acoustic energy is possibly extracted from the mean flow.
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More information
Accepted/In Press date: 11 January 2019
e-pub ahead of print date: 21 January 2019
Published date: 28 April 2019
Additional Information:
Funding Information:
This research was supported by the National Natural Science Foundation of China (Grant Nos. 51576009 , 51711530036 and 11661141020 ).
Keywords:
Acoustic impedance, Dissipative silencer, Grazing flow effect, Perforated plate, Sound-absorbing material
Identifiers
Local EPrints ID: 485875
URI: http://eprints.soton.ac.uk/id/eprint/485875
ISSN: 0022-460X
PURE UUID: 459f9063-295d-45c8-9550-6859e88013e5
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Date deposited: 03 Jan 2024 19:33
Last modified: 18 Mar 2024 03:51
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Contributors
Author:
Yang Meng
Author:
Long Wu
Author:
Xiaodong Jing
Author:
Xiaofeng Sun
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