Tonal and broadband noise control of an axial flow fan with metal foams: design and experimental validation
Tonal and broadband noise control of an axial flow fan with metal foams: design and experimental validation
This paper presents an application of metal foams for controlling aerodynamic noise of an axial flow fan. A configuration of a semi-open cell metal foam combined with a backing cavity is employed to attenuate the tonal component while an open-cell metal foam is also used to absorb the broadband component. An acoustic power ratio formulation is used to analyze the spectrum feature of the fan tonal noise, and an acoustic impedance model is employed to determine the optimal parameters of the metal foam and the cavity. Experimental results confirm that the tonal noise is greatly reduced by the semi-open cell metal foam and the open cell metal foam shows a potential of absorbing the broadband noise.
Xu, Chen
b53e92d4-e474-420b-a662-4af9a1c8750b
Mao, Yijun
acc5a023-2fd6-4b0e-af88-d1c561fca3d3
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Xu, Chen
b53e92d4-e474-420b-a662-4af9a1c8750b
Mao, Yijun
acc5a023-2fd6-4b0e-af88-d1c561fca3d3
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Xu, Chen, Mao, Yijun and Hu, Zhiwei
(2016)
Tonal and broadband noise control of an axial flow fan with metal foams: design and experimental validation.
22nd AIAA/CEAS Aeroacoustics Conference, Lyon, France.
30 May - 01 Jun 2016.
22 pp
.
(doi:10.2514/6.2016-3062).
Record type:
Conference or Workshop Item
(Paper)
Abstract
This paper presents an application of metal foams for controlling aerodynamic noise of an axial flow fan. A configuration of a semi-open cell metal foam combined with a backing cavity is employed to attenuate the tonal component while an open-cell metal foam is also used to absorb the broadband component. An acoustic power ratio formulation is used to analyze the spectrum feature of the fan tonal noise, and an acoustic impedance model is employed to determine the optimal parameters of the metal foam and the cavity. Experimental results confirm that the tonal noise is greatly reduced by the semi-open cell metal foam and the open cell metal foam shows a potential of absorbing the broadband noise.
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Submitted date: 28 April 2016
e-pub ahead of print date: June 2016
Venue - Dates:
22nd AIAA/CEAS Aeroacoustics Conference, Lyon, France, 2016-05-30 - 2016-06-01
Organisations:
Aerodynamics & Flight Mechanics Group
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Local EPrints ID: 399633
URI: http://eprints.soton.ac.uk/id/eprint/399633
PURE UUID: 9da60bce-1277-4410-ab20-f581861a6f12
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Date deposited: 22 Aug 2016 13:38
Last modified: 15 Mar 2024 01:57
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Author:
Chen Xu
Author:
Yijun Mao
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