Bulletin of the American Physical Society
67th Annual Meeting of the APS Division of Fluid Dynamics
Volume 59, Number 20
Sunday–Tuesday, November 23–25, 2014; San Francisco, California
Session L9: Minisymposium I: Frontiers of Computational Science in Transport Phenomena
3:35 PM–5:45 PM,
Monday, November 24, 2014
Chair: Gianluca Iaccarino, Stanford University
Abstract ID: BAPS.2014.DFD.L9.4
Abstract: L9.00004 : Computational aeroacoustics of turbulent high-speed jets*
4:53 PM–5:19 PM
Preview Abstract Abstract
Joseph W. Nichols
(Aerospace Engineering and Mechanics Dept., University of Minnesota)
Despite significant scientific investigation, jet noise remains a large component of the overall noise generated by supersonic aircraft. Experiments show that alterations to nozzle geometry, such as the addition of chevrons to the nozzle lip, can significantly reduce jet noise. In this talk, we assess unstructured large eddy simulation as a tool for predicting and understanding the aeroacoustic effects of complex geometry upon supersonic jets. Body-fitted, adaptive meshes are used to simulate the flow inside, around and through complicated nozzles, and results are validated against experimental measurements. High-fidelity simulations utilizing as many as one million processors simultaneously will be discussed, allowing for a detailed description of interactions between turbulence, shocks, and acoustics. This includes observations of the phenomenon of ``crackle'' noise in heated supersonic jets. We will briefly discuss challenges met and overcome along this frontier of com putational science, and describe how information extracted from the high-fidelity simulations can be used to construct accurate reduced-order models useful for aeroacoustic design.
*Computational resources were provided by the Argonne Leadership Computing Facility at Argonne National Laboratory and the ERDC and AFRL supercomputing centers.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2014.DFD.L9.4
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