Numerical study of aeroacoustic coupling in a subsonic confined cavity

Thomas Emmert, Philippe Lafon, Christophe Bailly

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A ducted cavity flow at moderate Mach number is investigated numerically by compressible large-eddy simulation based on explicit filtering of the Navier-Stokes equations and on high-order finite-difference algorithm. Experimental observations reveal that for some particular free stream Mach number values, a coupling occurs between the cavity flow and the pressure oscillations in the duct. The present computations retrieve most of the physical phenomena. The lock-in frequencies are well predicted but the amplitude of the oscillations exhibits some discrepancies. Computations on coarse and fine grids show that the hierarchy of the cavity modes is better captured on a finer grid.

Original languageEnglish
Title of host publication14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference)
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781563479397
DOIs
Publication statusPublished - 1 Jan 2008
Externally publishedYes

Publication series

Name14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference)

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