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

Langenais, Adrien; Vincent, François; Peyret, Christophe; Chaineray, Gilles; Bailly, Christophe

doi:10.1007/s10494-018-9928-0

Cited by 9 publications

(12 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method is called order mapping or p-adaptation and greatly improves the usage convenience. A description of the non-reflective boundary conditions and the shock-capturing scheme can be found in Langenais et al 39…”

Section: Acoustic Computationmentioning

confidence: 99%

“…At the end of a coupling cycle, exchanged values are used by each solver to compute the numerical flux at the interface. An extended description of the coupling features and a set of appropriated validation test cases can be found in Langenais et al 39 Since the flow and the acoustic computations are respectively second and fourth order accurate, the coupling interface can be seen as an accuracy discontinuity which could generates numerical instabilities. This issue is treated by locally adapting the element order close to the interface on the SPACE side.…”

Section: Two-way Couplingmentioning

confidence: 99%

“…Two-way coupling between fully 3D unstructured Navier-Stokes and Euler solvers has been recently developed and validated for space applications. 39 Finally, the presence of acoustic nonlinearities in the near field is admitted 6,40 but the need of a nonlinear acoustic solver to compute the far field propagation is still debated. The dimensionless Goldberg number Γ can be introduced 7 as an indicator to distinguish regions where cumulative acoustic nonlinearities are dominant compared to the atmospheric damping.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Accurate simulation of the noise generated by a hot supersonic jet including turbulence tripping and nonlinear acoustic propagation

et al. 2019

Self Cite

View full text Add to dashboard Cite

A procedure to accurately simulate a free hot supersonic jet and its associated noise, which uses simultaneously a turbulence tripping method and a two-way coupling between a flow solver and a nonlinear acoustic solver, is proposed in this study. A Mach 3.1 overexpanded hot jet is computed via a large-eddy simulation by solving the filtered Navier-Stokes equations with a finite volume method on unstructured grids. The resulting noise is propagated in the far field by solving the full Euler equations with a high-order discontinuous Galerkin method on unstructured grids. The full convergent-divergent nozzle is explicitly included in the computational domain thanks to the unstructured flow solver. Both a refined grid and a geometrical boundary layer tripping in the convergent are used to get highly disturbed turbulent conditions at the nozzle lips. The flow field appears to agree with the expected turbulence behavior and the available experimental data. The jet development shows significant improvement compared to similar past simulations. The far field acoustic levels are finely recovered at most of observation angles. An analysis of the acoustic near and far fields is then performed. The studied conditions lead to strong shock-associated noise and Mach wave emission. The spatio-frequency and azimuthal content of the acoustic field is described in order to identify the main noise properties. A particular noise component, different from screech tones and radiating upstream like Mach waves, is highlighted. Nonlinear propagation effects are finally quantified through specific metrics. They are found significant in both the near and the far fields which justifies the use of a nonlinear acoustic solver.

show abstract

Section: Acoustic Computationmentioning

confidence: 99%

Section: Two-way Couplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Accurate simulation of the noise generated by a hot supersonic jet including turbulence tripping and nonlinear acoustic propagation

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Such mapping will be detailed further ahead. The PPW for calculating Strouhal cut-off depends on the order: PPW=3 at 4 th order and PPW=14 at 2 nd order [16].…”

Section: Caamentioning

confidence: 99%

Coupled CFD-CAA Simulation of the Noise Generated by a Hot Supersonic Jet Impinging on a Flat Plate with Exhaust Hole

Troyes¹,

Vincent²,

Langenais³

et al. 2019

25th AIAA/CEAS Aeroacoustics Conference

Self Cite

View full text Add to dashboard Cite

In this study, the methodology relying on LES for the generation of the acoustic sources coupled with an Euler solver for their propagation, previously developed for a free hot supersonic jet, has been applied to a similar jet but impinging on a plate with an exhaust hole. Attention has been paid to the turbulent state of the nozzle exit boundary layer, which is a key parameter for jet noise simulation.

show abstract

“…152 Similar to the hybrid workflow using direct simulations of flow and sound in the nearfield and Ffowcs Williams and Hawkings integral to predict the far-field, Euler equations can be utilized to predict the far-field and backscattering including nonlinear effects. 153 This workflow has been applied to assess the noise reduction by wavy leading airfoil edges. 154 Based Since then, the LEE have been modified e.g.…”

Section: Linearized Eulermentioning

confidence: 99%

Hybrid Aeroacoustic Computations: State of Art and New Achievements

Schoder

2019

J. Theor. Comp. Acout.

View full text Add to dashboard Cite

This paper collects the state of the art and the tremendous progress that has been made in hybrid modeling of aeroacoustic sound. Hybrid modeling is defined such that flow and acoustics are modeled separate and connected by an aeroacoustic model. The contributions will be classified with respect to the aeroacoustic models being developed, covering Lighthill’s analogy, Ffowcs Williams and Hawkings, vortex sound, linearized Euler equations (LEE), and different perturbation equations modeling flow induced sound. Within each topic, specific applications, such as jet noise, aircraft noise, ground mobility, noise, fan noise and human phonation, are covered. We focus on the accomplishments and provide the authors’ contribution to aeroacoustic research. Eventually, a concise summary of the different methods and their capabilities is included.

show abstract

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

Cited by 9 publications

References 38 publications

Accurate simulation of the noise generated by a hot supersonic jet including turbulence tripping and nonlinear acoustic propagation

Accurate simulation of the noise generated by a hot supersonic jet including turbulence tripping and nonlinear acoustic propagation

Coupled CFD-CAA Simulation of the Noise Generated by a Hot Supersonic Jet Impinging on a Flat Plate with Exhaust Hole

Hybrid Aeroacoustic Computations: State of Art and New Achievements

Contact Info

Product

Resources

About