Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session F06: Aeroacoustics
8:00 AM–10:10 AM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B208
Chair: Yuji Hattori, Tohoku University
Abstract ID: BAPS.2018.DFD.F06.2
Abstract: F06.00002 : Continued Development of a Coupled LES/Stochastic Approach to Jet Noise Prediction *
8:13 AM–8:26 AM
Presenter:
Joshua D Blake
(Mississippi State University)
Authors:
Joshua D Blake
(Mississippi State University)
Adrian Sescu
(Mississippi State University)
David Thompson
(Mississippi State University)
Yuji Hattori
(Tohoku University)
Turbulence modeling for jet noise prediction remains a challenge due to the wide range of temporal and spatial scales present in the jet. Smaller turbulent scales corresponding to higher-frequency jet noise content often reside in a critical range for human hearing. Resolving this content with LES or DNS requires a large amount of computational resources. With the goal of extending the high frequency content of LES jet noise predictions at a reduced cost, we employ a coupled LES/stochastic method, wherein large flow structures are solved via very large eddy simulations (VLES), while the smaller-scale flow structures are modeled via synthetic turbulence. We show the feasibility of such a coupled approach with a Fourier-based stochastic method, and we present progress toward developing a synthetic-eddy-based method for the supplemented small-scale turbulence. Comparisons between the current approach and pure LES show that predicting additional higher frequency content in a more cost-effective approach is more efficient than simply increasing the grid resolution in the LES framework.
*This work was carried out under the Collaborative Research Project between the Institute of Fluid Science, Tohoku University, and the Center for Advanced Vehicular Systems, Mississippi State University.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.F06.2
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