Prediction of aeroacoustic noise generated by viscous flow around rectangular cross sections

Jungkeun Yoo, Jongsoo Lee

Research output: Contribution to journalConference article

Abstract

The paper describes the prediction of the airflow induced sound noise around two-element rectangular cross sections in tandem arrangement via CFD based aeroacoustic analysis method. Reynolds number considered in the present study is Re=2×105 to describe aerodynamic and aeroacoustic characteristics applicable to high speed civil transportation systems. The 2D unsteady viscous flow was calculated using finite element based program in which downstream vortex shedding and turbulence were included. The paper explores noise prediction based on the Ffowcs Williams-Hawkings (FW-H) equation wherein three source terms of monopole, dipole and quadrupole are identified. The baseline model is two-element rectangular sections placed parallel to freestream. Rectangular and trapezoidal type sections having different positioning distance between two elements are considered. Parametric study is conducted to examine aerodynamic and aeroacoustic characteristics with respect to configuration of cross sections.

Original languageEnglish
Pages (from-to)1015-1024
Number of pages10
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume1
Issue numberII
Publication statusPublished - 2000 Jan 1

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Aeroacoustics
Viscous flow
Acoustic noise
Aerodynamics
Vortex shedding
Computational fluid dynamics
Reynolds number
Turbulence
Acoustic waves

All Science Journal Classification (ASJC) codes

  • Architecture

Cite this

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abstract = "The paper describes the prediction of the airflow induced sound noise around two-element rectangular cross sections in tandem arrangement via CFD based aeroacoustic analysis method. Reynolds number considered in the present study is Re=2×105 to describe aerodynamic and aeroacoustic characteristics applicable to high speed civil transportation systems. The 2D unsteady viscous flow was calculated using finite element based program in which downstream vortex shedding and turbulence were included. The paper explores noise prediction based on the Ffowcs Williams-Hawkings (FW-H) equation wherein three source terms of monopole, dipole and quadrupole are identified. The baseline model is two-element rectangular sections placed parallel to freestream. Rectangular and trapezoidal type sections having different positioning distance between two elements are considered. Parametric study is conducted to examine aerodynamic and aeroacoustic characteristics with respect to configuration of cross sections.",
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T1 - Prediction of aeroacoustic noise generated by viscous flow around rectangular cross sections

AU - Yoo, Jungkeun

AU - Lee, Jongsoo

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N2 - The paper describes the prediction of the airflow induced sound noise around two-element rectangular cross sections in tandem arrangement via CFD based aeroacoustic analysis method. Reynolds number considered in the present study is Re=2×105 to describe aerodynamic and aeroacoustic characteristics applicable to high speed civil transportation systems. The 2D unsteady viscous flow was calculated using finite element based program in which downstream vortex shedding and turbulence were included. The paper explores noise prediction based on the Ffowcs Williams-Hawkings (FW-H) equation wherein three source terms of monopole, dipole and quadrupole are identified. The baseline model is two-element rectangular sections placed parallel to freestream. Rectangular and trapezoidal type sections having different positioning distance between two elements are considered. Parametric study is conducted to examine aerodynamic and aeroacoustic characteristics with respect to configuration of cross sections.

AB - The paper describes the prediction of the airflow induced sound noise around two-element rectangular cross sections in tandem arrangement via CFD based aeroacoustic analysis method. Reynolds number considered in the present study is Re=2×105 to describe aerodynamic and aeroacoustic characteristics applicable to high speed civil transportation systems. The 2D unsteady viscous flow was calculated using finite element based program in which downstream vortex shedding and turbulence were included. The paper explores noise prediction based on the Ffowcs Williams-Hawkings (FW-H) equation wherein three source terms of monopole, dipole and quadrupole are identified. The baseline model is two-element rectangular sections placed parallel to freestream. Rectangular and trapezoidal type sections having different positioning distance between two elements are considered. Parametric study is conducted to examine aerodynamic and aeroacoustic characteristics with respect to configuration of cross sections.

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