Prediction of combustion-generated noise in non-premixed turbulent jet flames using large-eddy simulation

Matthias Ihme, Daniel J. Bodony, Heinz Pitsch

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

Abstract

A model for the prediction of combustion-generated noise in non-premixed flames has been developed. This model is based on Lighthill's acoustic analogy and employs the flamelet/progress variable model to express the so-called excess density as function of the mixture fraction and the progress variable. The source terms appearing in this formulation have been analyzed and three sources have been identified as main contributors to the acoustic pressure observed at the far-field. The model has been applied in the numerical simulation of the acoustic pressure generated in a non-premixed turbulent open flame. For the prediction of the flow field a low Mach number large-eddy simulation has been performed. The relevant acoustic sources are extracted from the large-eddy simulation and are used for the prediction of the far-field pressure. Numerical results for the sound pressure level are in agreement with experimental data in the low frequency range but over-predict the measured spectra at higher frequencies.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference
Pages2753-2768
Number of pages16
StatePublished - Dec 27 2006
Externally publishedYes
Event12th AIAA/CEAS Aeroacoustics Conference - Cambridge, MA, United States
Duration: May 8 2006May 10 2006

Publication series

NameCollection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference
Volume5

Other

Other12th AIAA/CEAS Aeroacoustics Conference
CountryUnited States
CityCambridge, MA
Period5/8/065/10/06

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Ihme, M., Bodony, D. J., & Pitsch, H. (2006). Prediction of combustion-generated noise in non-premixed turbulent jet flames using large-eddy simulation. In Collection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference (pp. 2753-2768). (Collection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference; Vol. 5).