Fluid-Acoustic Coupling and Wave Propagation

Utzmann, Jens; Munz, Claus‐Dieter; Dumbser, Michael; Sonnendrücker, Éric; Salmon, Stéphanie; Jund, Sébastien; Frénod, Emmanuel

doi:10.1007/978-3-540-89956-3_3

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…The link between the two solvers CEDRE and SPACE is a two-way surfacic coupling without using a mesh overlapping contrary to what is often implemented in existing approaches [23,27,30,31]. Boundary point location and data exchange are operated via MPI communications thanks to the open source CWIPI coupling library proposed by Quemerais from ONERA [38,44].…”

Section: Coupling Proceduresmentioning

confidence: 99%

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Assessment of a Two-Way Coupling Methodology Between a Flow and a High-Order Nonlinear Acoustic Unstructured Solvers

Langenais

Vincent

Peyret

et al. 2018

Flow Turbulence Combust

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A two-way coupling on unstructured meshes between a flow and a high-order acoustic solvers for jet noise prediction is considered. The flow simulation aims at generating acoustic sources in the near field while the acoustic simulation solves the full Euler equations, thanks to a discontinuous Galerkin method, in order to take into account nonlinear acoustic propagation effects. This methodology is firstly validated on academic cases involving nonlinear sound propagation, shock waves and convection of aerodynamic perturbations. The results are compared to analytical solutions and direct computations. A good behaviour of the coupling is found regarding the targeted space applications. An application on a launch pad model is then simulated to demonstrate the robustness and reliability of the present approach.

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Section: Coupling Proceduresmentioning

confidence: 99%

“…One-way coupling methods between a flow solver and an aeroacoustic solver based on Euler equations are more and more implemented to take care of possible mean flow effects. Various strategies in terms of meshing and coupling algorithms have already been assessed [23,24]. The Navier-Stokes equations (NS) Fig.…”

Section: Introductionmentioning

confidence: 99%

Assessment of a Two-Way Coupling Methodology Between a Flow and a High-Order Nonlinear Acoustic Unstructured Solvers

Langenais

Vincent

Peyret

et al. 2018

Flow Turbulence Combust

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Approximate computation of acoustic reflection and shadow effects using the Kirchhoff method

Rahier,

Peyret

2024

Acta Acust.

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The article presents a fairly simple way to take solid bodies into account in acoustic radiation calculations using integral methods, while still using the free-space Green’s function. The approach is based on the Kirchhoff method and on a locally plane reflection assumption. It can be applied to both analytical noise sources and acoustic disturbances provided by numerical simulations, to fixed or mobile noise sources, concentrated or widely spread in a moving medium. The time-domain formulation is an important advantage for periodic signals rich in harmonics (rotors or propellers impulsive noise) and for broadband signals (profile or jet noise). The formulation and calculation algorithm are described in detail. The method’s accuracy and limitations are shown first by comparing the results with analytical solutions for the acoustic scattering of a point source by a sphere, for a fluid at rest. An application example is then given for a wing in a Mach 0.5 flow, and the results are compared with the numerical solution of the linearized Euler equations, in the presence of a mean flow. In addition, the article proposes expressions for direct calculation of the pressure gradient by Kirchhoff and Ffowcs Williams-Hawkings surface formulations.

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Coupled Discontinuous Galerkin/Finite Difference Solver on Hybrid Meshes for Computational Aeroacoustics

2012

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Fluid-Acoustic Coupling and Wave Propagation

Cited by 5 publications

References 22 publications

Assessment of a Two-Way Coupling Methodology Between a Flow and a High-Order Nonlinear Acoustic Unstructured Solvers

Assessment of a Two-Way Coupling Methodology Between a Flow and a High-Order Nonlinear Acoustic Unstructured Solvers

Approximate computation of acoustic reflection and shadow effects using the Kirchhoff method

Coupled Discontinuous Galerkin/Finite Difference Solver on Hybrid Meshes for Computational Aeroacoustics

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