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Overset-LES with Stochastic Forcing for Sound Source Simulation

Bernicke, Paul and Akkermans, R.A.D. and Ewert, Roland and Dierke, Jürgen (2018) Overset-LES with Stochastic Forcing for Sound Source Simulation. In: New Results in Numerical and Experimental Fluid Mechanics XI Notes on Numerical Fluid Machanics and Multidisciplinary Design, 136. Springer International Publishing. pp. 601-610. doi: 10.1007/978-3-319-64519-3_54. ISBN 978-3-319-64518-6.

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An application of a hybrid RANS/LES method to trailing-edge noise, is presented in this contribution. The numerical framework of the CAA-code PIANO offers a basis for extending the Non-Linear Perturbation equations with viscous terms. As a result, a full Navier-Stokes equations perturbation analysis, denoted with Overset, can be performed on top of a steady background flow. With such a scale-resolving simulation tool, consisting of optimized higher-order numerical schemes for aeroacoustics, the investigation of sound source mechanism on first principals become feasible. An issue of such hybrid zonal approaches, namely the seeding of proper inflow turbulence, is solved with the Fast Random Particle-Mesh method in combination with the Eddy-Relaxation source term. The overall process chain of the intended Overset-LES usage is illustrated by means of NACA0012 trailing-edge noise computations at moderate Reynolds number and zero angle-of-attack.

Item URL in elib:https://elib.dlr.de/125425/
Document Type:Contribution to a Collection
Title:Overset-LES with Stochastic Forcing for Sound Source Simulation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bernicke, PaulTU BraunschweigUNSPECIFIED
Akkermans, R.A.D.rinie.akkermans (at) dlr.deUNSPECIFIED
Ewert, Rolandroland.ewert (at) dlr.deUNSPECIFIED
Dierke, Jürgenjuergen.dierke (at) dlr.deUNSPECIFIED
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics XI
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1007/978-3-319-64519-3_54
Page Range:pp. 601-610
Publisher:Springer International Publishing
Series Name:Notes on Numerical Fluid Machanics and Multidisciplinary Design
Keywords:CAA, Overset-LES, Volume forcing, Trailing-edge simulation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Dierke, Jürgen
Deposited On:07 Jan 2019 16:29
Last Modified:23 Feb 2019 00:23

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