CUED Publications database

Prediction of sound emission from open turbulent premixed flames

Swaminathan, N and Xu, G and Dowling, AP and Balachandran, R (2010) Prediction of sound emission from open turbulent premixed flames. 16th AIAA/CEAS Aeroacoustics Conference (31st AIAA Aeroacoustics Conference).

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Abstract

The sound emission from open turbulent flames is dictated by the two-point spatial correlation of rate of change of fluctuating heat release rate and this correlation has not been investigated directly in the past studies. Turbulent premixed flame data from DNS and laser diagnostics are analyzed to study this correlation function and the two-point spatial correlation of the fluctuating heat release rate. This shows that the correlation functions have simple Gaussian forms whose integral length scale is related to the laminar flame thickness and amplitude depends on the spatial distribution of the time-mean rate of heat release. These results and RANS-CFD solution of open turbulent premixed flames are post-processed to obtain the far field SPL, which agrees well with measured values. © 2010 by the American Institute of Aeronautics and Astronautics, Inc.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Fluid Mechanics
Div A > Energy
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:33
Last Modified: 27 Nov 2014 19:25
DOI: