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Numerical Investigation of Slot and Configuration Impact on the Efficiency of Tangential Blowing at a Vertical Tailplane with Infinite Span Read chapter Read first chapter

2018 | OriginalPaper | Chapter

Overset-LES with Stochastic Forcing for Sound Source Simulation

Authors : P. Bernicke, R. A. D. Akkermans, R. Ewert, J. Dierke

Published in: New Results in Numerical and Experimental Fluid Mechanics XI

Publisher: Springer International Publishing

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Abstract

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.

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previous chapter Recent Advances in Volumetric Flow Measurements: High-Density Particle Tracking (‘Shake-The-Box’) with Navier-Stokes Regularized Interpolation (‘FlowFit’)
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Metadata
Title
Overset-LES with Stochastic Forcing for Sound Source Simulation
Authors
P. Bernicke
R. A. D. Akkermans
R. Ewert
J. Dierke
Copyright Year
2018
Book
New Results in Numerical and Experimental Fluid Mechanics XI

Print ISBN: 978-3-319-64518-6

Electronic ISBN: 978-3-319-64519-3

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-64519-3_54

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