Aeroacoustic computation of cavity flow in self-sustained oscillations

Sung Ryong Koh, Yong Cho, Young June Moon

Research output: Contribution to journalArticle

1 Citation (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, 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.

Original languageEnglish
Pages (from-to)590-598
Number of pages9
JournalKSME International Journal
Volume17
Issue number4
Publication statusPublished - 2003 Apr 1

Fingerprint

Aeroacoustics
Acoustics
Euler equations
Acoustic fields
Mach number
Automobiles
Seals
Aerodynamics
Reynolds number
Acoustic waves

Keywords

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

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Aeroacoustic computation of cavity flow in self-sustained oscillations. / Koh, Sung Ryong; Cho, Yong; Moon, Young June.

In: KSME International Journal, Vol. 17, No. 4, 01.04.2003, p. 590-598.

Research output: Contribution to journalArticle

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