Numerical simulation of the aeroacoustic noise in the separated laminar boundary layer

Hyo Won Choi; Young J. Moon; Kyu Jung Lee

doi:10.1007/BF02984399

Numerical simulation of the aeroacoustic noise in the separated laminar boundary layer

Hyo Won Choi, Young J. Moon, Kyu Jung Lee

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The unsteady flow characteristics and the related noise of separated incompressible laminar boundary layer flows (Re_δ·=614, 868, and 1,063) are numerically investigated. The characteristic lines of the wall pressure are examined to identify the primary noise source, related with the unsteady motion of the vortex at the reattachment point of the separation bubble. The generation and propagation of the vortex-induced noise in the separated laminar boundary layer are computed by the method of Computational Aero-Acoustics (CAA), and the effects of Reynolds number, Mach number and adverse pressure gradient strength are examined.

Original language	English
Pages (from-to)	280-287
Number of pages	8
Journal	KSME International Journal
Volume	17
Issue number	2
DOIs	https://doi.org/10.1007/BF02984399
Publication status	Published - 2003 Feb

Keywords

Aero-Acoustic Noise
Laminar
Separation Bubble
Unsteady
Vortex Shedding

ASJC Scopus subject areas

Mechanical Engineering

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10.1007/BF02984399

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title = "Numerical simulation of the aeroacoustic noise in the separated laminar boundary layer",

abstract = "The unsteady flow characteristics and the related noise of separated incompressible laminar boundary layer flows (Reδ·=614, 868, and 1,063) are numerically investigated. The characteristic lines of the wall pressure are examined to identify the primary noise source, related with the unsteady motion of the vortex at the reattachment point of the separation bubble. The generation and propagation of the vortex-induced noise in the separated laminar boundary layer are computed by the method of Computational Aero-Acoustics (CAA), and the effects of Reynolds number, Mach number and adverse pressure gradient strength are examined.",

keywords = "Aero-Acoustic Noise, Laminar, Separation Bubble, Unsteady, Vortex Shedding",

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doi = "10.1007/BF02984399",

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AU - Choi, Hyo Won

AU - Moon, Young J.

AU - Lee, Kyu Jung

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Y1 - 2003/2

N2 - The unsteady flow characteristics and the related noise of separated incompressible laminar boundary layer flows (Reδ·=614, 868, and 1,063) are numerically investigated. The characteristic lines of the wall pressure are examined to identify the primary noise source, related with the unsteady motion of the vortex at the reattachment point of the separation bubble. The generation and propagation of the vortex-induced noise in the separated laminar boundary layer are computed by the method of Computational Aero-Acoustics (CAA), and the effects of Reynolds number, Mach number and adverse pressure gradient strength are examined.

AB - The unsteady flow characteristics and the related noise of separated incompressible laminar boundary layer flows (Reδ·=614, 868, and 1,063) are numerically investigated. The characteristic lines of the wall pressure are examined to identify the primary noise source, related with the unsteady motion of the vortex at the reattachment point of the separation bubble. The generation and propagation of the vortex-induced noise in the separated laminar boundary layer are computed by the method of Computational Aero-Acoustics (CAA), and the effects of Reynolds number, Mach number and adverse pressure gradient strength are examined.

KW - Aero-Acoustic Noise

KW - Laminar

KW - Separation Bubble

KW - Unsteady

KW - Vortex Shedding

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Numerical simulation of the aeroacoustic noise in the separated laminar boundary layer

Abstract

Keywords

ASJC Scopus subject areas

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