Aeroacoustic computation of cavity flow in self-sustained oscillations

Sung Ryong Koh; Yong Cho; Young J. Moon

doi:10.1007/BF02984460

Aeroacoustic computation of cavity flow in self-sustained oscillations

Sung Ryong Koh, Yong Cho, Young J. Moon

School of Mechanical Engineering

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

2 Citations (Scopus)

Abstract

A computational aero-acoustic (CAA) method is used to predict the tonal noise generated from a cavity of automobile door seals or gaps at low flow Mach numbers (M_∞=0.077 and 0.147). In the present method, the acoustically perturbed Euler equations are solved with the acoustic source term obtained from the unsteady incompressible Navier-Stokes calculations of the cavity flow in self-sustained oscillations. The aerodynamic and acoustic fields are computed for the Reynolds numbers based on the displacement thickness, Re_δ*=850 and 1620 and their fundamental mode characteristics are investigated. The present method is also verified with the experimentally measured sound pressure level (SPL) spectra.

Original language	English
Pages (from-to)	590-598
Number of pages	9
Journal	KSME International Journal
Volume	17
Issue number	4
DOIs	https://doi.org/10.1007/BF02984460
Publication status	Published - 2003 Apr

Keywords

CFD
Cavity Tone
Computational Aero-Acoustics (CAA)
Feedback Mechanism

ASJC Scopus subject areas

Mechanical Engineering

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10.1007/BF02984460

Cite this

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title = "Aeroacoustic computation of cavity flow in self-sustained oscillations",

abstract = "A computational aero-acoustic (CAA) method is used to predict the tonal noise generated from a cavity of automobile door seals or gaps at low flow Mach numbers (M∞=0.077 and 0.147). In the present method, the acoustically perturbed Euler equations are solved with the acoustic source term obtained from the unsteady incompressible Navier-Stokes calculations of the cavity flow in self-sustained oscillations. The aerodynamic and acoustic fields are computed for the Reynolds numbers based on the displacement thickness, Reδ*=850 and 1620 and their fundamental mode characteristics are investigated. The present method is also verified with the experimentally measured sound pressure level (SPL) spectra.",

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AU - Cho, Yong

AU - Moon, Young J.

PY - 2003/4

Y1 - 2003/4

N2 - A computational aero-acoustic (CAA) method is used to predict the tonal noise generated from a cavity of automobile door seals or gaps at low flow Mach numbers (M∞=0.077 and 0.147). In the present method, the acoustically perturbed Euler equations are solved with the acoustic source term obtained from the unsteady incompressible Navier-Stokes calculations of the cavity flow in self-sustained oscillations. The aerodynamic and acoustic fields are computed for the Reynolds numbers based on the displacement thickness, Reδ*=850 and 1620 and their fundamental mode characteristics are investigated. The present method is also verified with the experimentally measured sound pressure level (SPL) spectra.

AB - A computational aero-acoustic (CAA) method is used to predict the tonal noise generated from a cavity of automobile door seals or gaps at low flow Mach numbers (M∞=0.077 and 0.147). In the present method, the acoustically perturbed Euler equations are solved with the acoustic source term obtained from the unsteady incompressible Navier-Stokes calculations of the cavity flow in self-sustained oscillations. The aerodynamic and acoustic fields are computed for the Reynolds numbers based on the displacement thickness, Reδ*=850 and 1620 and their fundamental mode characteristics are investigated. The present method is also verified with the experimentally measured sound pressure level (SPL) spectra.

KW - CFD

KW - Cavity Tone

KW - Computational Aero-Acoustics (CAA)

KW - Feedback Mechanism

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JO - KSME International Journal

JF - KSME International Journal

IS - 4

ER -

Aeroacoustic computation of cavity flow in self-sustained oscillations

Abstract

Keywords

ASJC Scopus subject areas

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