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Scaling procedures of cabin noise generated by turbulent boundary layer excitation

Scaling procedures of cabin noise generated by turbulent boundary layer excitation
Scaling procedures of cabin noise generated by turbulent boundary layer excitation

This paper presents a new method for measuring the cabin noise of a structure in a wind tunnel. A method for scaling the cabin sound was derived to obtain the cabin noise of a structure, and the derivation of the scaling procedure was based on a theoretical hypothesis regarding the cabin noise prediction for a scaled model in a wind tunnel. A frequency offset was generated because of the error introduced by model manufacture and installation, and a proposed modal test method was used to eliminate the frequency offset. Both a full-scale structure and scaled structure were measured in the wind tunnel tests. The cabin noise of the full-scale model was compared with the results obtained using the scaling procedure based on the scaled model. The comparisons of the measurement results indicate that the scaling procedures developed in this paper are effective for vibro-acoustic predictions in wind tunnels. Moreover, background noise tended to affect the results of the cabin sound for the wind tunnel test, and thus background noise should be prevented through specific design efforts.

Cabin noise, Scaling procedure, Turbulent boundary layer, Vibro-acoustic, Wind tunnel
1000-9361
Zhao, Xiaojian
8b46afd3-63f2-4e7d-9184-0c462188d88d
Song, Wei
561f1e4f-3f90-454e-8809-aa6ff314834c
Zhou, Jie
ea4ca5fc-7c95-4b68-824a-b16792fee77a
Ai, Bangcheng
b84fd5ba-dbfa-4a52-a8c9-c538a8d92ed4
Zhao, Xiaojian
8b46afd3-63f2-4e7d-9184-0c462188d88d
Song, Wei
561f1e4f-3f90-454e-8809-aa6ff314834c
Zhou, Jie
ea4ca5fc-7c95-4b68-824a-b16792fee77a
Ai, Bangcheng
b84fd5ba-dbfa-4a52-a8c9-c538a8d92ed4

Zhao, Xiaojian, Song, Wei, Zhou, Jie and Ai, Bangcheng (2018) Scaling procedures of cabin noise generated by turbulent boundary layer excitation. Chinese Journal of Aeronautics. (doi:10.1016/j.cja.2017.12.015).

Record type: Article

Abstract

This paper presents a new method for measuring the cabin noise of a structure in a wind tunnel. A method for scaling the cabin sound was derived to obtain the cabin noise of a structure, and the derivation of the scaling procedure was based on a theoretical hypothesis regarding the cabin noise prediction for a scaled model in a wind tunnel. A frequency offset was generated because of the error introduced by model manufacture and installation, and a proposed modal test method was used to eliminate the frequency offset. Both a full-scale structure and scaled structure were measured in the wind tunnel tests. The cabin noise of the full-scale model was compared with the results obtained using the scaling procedure based on the scaled model. The comparisons of the measurement results indicate that the scaling procedures developed in this paper are effective for vibro-acoustic predictions in wind tunnels. Moreover, background noise tended to affect the results of the cabin sound for the wind tunnel test, and thus background noise should be prevented through specific design efforts.

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Accepted/In Press date: 28 June 2017
e-pub ahead of print date: 3 February 2018
Keywords: Cabin noise, Scaling procedure, Turbulent boundary layer, Vibro-acoustic, Wind tunnel

Identifiers

Local EPrints ID: 418393
URI: http://eprints.soton.ac.uk/id/eprint/418393
ISSN: 1000-9361
PURE UUID: 0e490b1f-60b4-41cd-a637-6ff48eba052d

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Date deposited: 06 Mar 2018 17:30
Last modified: 25 Nov 2021 18:52

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Contributors

Author: Xiaojian Zhao
Author: Wei Song
Author: Jie Zhou
Author: Bangcheng Ai

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