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Modification of turbulent boundary layer model based on wall fluctuations measurement

Modification of turbulent boundary layer model based on wall fluctuations measurement
Modification of turbulent boundary layer model based on wall fluctuations measurement

A modified turbulent boundary layer (TBL) model based the measurement performed in wind tunnel is proposed to investigate the turbulent boundary layer excitation which usually causes serious vibration of the aircraft structure. The Corcos model is the widely used and classical TBL model to simulate the fluctuating pressure excitation over the aircraft structure. However, the assumption of the non-pressure gradient in boundary layer limits its application in a high-speed flow. To extend the classical model to satisfy the high-speed flow, a modified model based on the measurement in wind tunnel is used to modify the Corcos model. To show the superiority of the modified model developed in this study, different TBL models are used to describe theoretical results and experimental results, respectively. The research results demonstrated that the modified model of TBL excitation could make a better agreement with the test results in wind tunnel than that of the classical Corcos model. Meanwhile, such simpler expression of the modified model shows its great convenience to resolve the engineering problems.

Turbulent boundary layer, Wall fluctuations, Wavenumber-frequency, Wind tunnel test
0003-682X
168-172
Zhao, Xiaojian
8b46afd3-63f2-4e7d-9184-0c462188d88d
Zhou, Jie
ea4ca5fc-7c95-4b68-824a-b16792fee77a
Zhao, Xiaojian
8b46afd3-63f2-4e7d-9184-0c462188d88d
Zhou, Jie
ea4ca5fc-7c95-4b68-824a-b16792fee77a

Zhao, Xiaojian and Zhou, Jie (2018) Modification of turbulent boundary layer model based on wall fluctuations measurement. Applied Acoustics, 133, 168-172. (doi:10.1016/j.apacoust.2017.12.026).

Record type: Article

Abstract

A modified turbulent boundary layer (TBL) model based the measurement performed in wind tunnel is proposed to investigate the turbulent boundary layer excitation which usually causes serious vibration of the aircraft structure. The Corcos model is the widely used and classical TBL model to simulate the fluctuating pressure excitation over the aircraft structure. However, the assumption of the non-pressure gradient in boundary layer limits its application in a high-speed flow. To extend the classical model to satisfy the high-speed flow, a modified model based on the measurement in wind tunnel is used to modify the Corcos model. To show the superiority of the modified model developed in this study, different TBL models are used to describe theoretical results and experimental results, respectively. The research results demonstrated that the modified model of TBL excitation could make a better agreement with the test results in wind tunnel than that of the classical Corcos model. Meanwhile, such simpler expression of the modified model shows its great convenience to resolve the engineering problems.

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More information

Accepted/In Press date: 20 December 2017
e-pub ahead of print date: 28 December 2017
Published date: 1 April 2018
Keywords: Turbulent boundary layer, Wall fluctuations, Wavenumber-frequency, Wind tunnel test

Identifiers

Local EPrints ID: 417337
URI: http://eprints.soton.ac.uk/id/eprint/417337
ISSN: 0003-682X
PURE UUID: 4222ce17-41fd-40fb-9e62-547a1dfb7ed4

Catalogue record

Date deposited: 30 Jan 2018 17:30
Last modified: 07 Oct 2020 00:33

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Contributors

Author: Xiaojian Zhao
Author: Jie Zhou

University divisions

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