Free-shear-flow turbulence scales and their far-field sound

Randall R. Kleinman, Jonathan B. Freund

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Temporally-developing turbulent mixing layers are simulated with Reynolds numbers that vary by a factor of twelve to assess the role of increasing small-scale turbulence on the energy and spectra of the radiated sound. It is found that a small fraction of the radiated noise comes from the added scales, which confirms that only the largest scales-defined here rigorously via turbulence spectra-contribute to the radiated sound, putting little burden on sub-grid scale models to predict sound in large-eddy simulations.

Original languageEnglish (US)
Title of host publication14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference)
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781563479397
DOIs
StatePublished - 2008

Publication series

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

ASJC Scopus subject areas

  • General Engineering

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