High-order sonic boom modeling based on adaptive methods

Alauzet, Frédéric; Loseille, Adrien

doi:10.1016/j.jcp.2009.09.020

Cited by 156 publications

(119 citation statements)

References 29 publications

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“…It is based on Wolf [10], our in-house flow solver developped in the Gamma3 team at Inria. The advection equation is the following:…”

Section: Advection Solvermentioning

confidence: 99%

3D Parallel Anisotropic Unsteady Mesh Adaptation for the High-Fidelity Prediction of Bubble Motion

Menier

2015

ESAIM: Proc.

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Abstract. Anisotropic unsteady mesh adaptation is applied to the high-fidelity prediction of bubble motion, which has applications in the framework of safety evaluations for nuclear reactors. A prescribed advection of the bubble is performed, which lacks any physical sense but is representative of the reality and makes it possible to precisely measure the diffusion caused by the numerical model. The model is described, and results are presented in 2D and 3D, with comparisons in terms of mesh convergence, CPU time, and propagation of the interface.Résumé. L'adaptation de maillage instationnaire anisotropique est appliquéeà la prédiction hautefidélité de la propagation de l'interface d'une bulle, dont les applications existent notamment dans le cadre desévaluations de sureté des réacteurs nucléaires. Une advection de la bulle est prescrite, qui n'est pas physique mais représente bien la réalité tout en permettant une mesure précise de la diffusion causée par le modéle numérique. Ce dernier est décrit et des résultats sont présentés en 2D et 3D avec comparaisons des convergences en maillage, des temps CPU et de la propagation de l'interface de la bulle.

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“…It is based on Wolf [10], our in-house flow solver developped in the Gamma3 team at Inria. The advection equation is the following:…”

Section: Advection Solvermentioning

confidence: 99%

3D Parallel Anisotropic Unsteady Mesh Adaptation for the High-Fidelity Prediction of Bubble Motion

Menier

2015

ESAIM: Proc.

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“…Considering that the near-¦eld data have been extracted very close to the source compared to that is presented in the literature [8], a study of convergence in r/L should be performed to validate the pressure levels. The problems of numerical resolution of both matching methods on the downstream part of the matched signal must also be tackled to improve the robustness and the accuracy of the global sonic boom prediction process.…”

Section: Configuration Aerodynamics Sonic Boom and Aerodynamic Modelmentioning

confidence: 99%

“…Even though attempts to perform CFD from the body to the ground with both evolutive schemes and equation formulations, as proposed by Kandil et al [7] or hybrid approaches more recently developed by Alauzet and Loseille performing calculations up to the far-¦eld before ray tracing propagation [8], the three-layer approach remains very competitive. Page and Plotkin proposed an e©cient three-layer approach [9] based on CFD computations for the near-¦eld, a near-to far-¦eld matching through multipole decomposition of the source of disturbances and an acoustic propagation through atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Impact of multipole matching resolution on supersonic aircraft sonic boom assessment

Din

Pape

Minelli

et al. 2013

Progress in Flight Physics

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Sonic boom assessment methods through numerical analysis have been ever-evolving since the development of the fundamental theory. With the growing need for e©cient low-boom design tools and the increasing computational resources, original approaches using advanced numerical simulation techniques have been developed. Among the various existing methods, the three-layer resolution introduced in the 1990s is very convenient for low-boom aircraft design. It is based on near-¦eld computational §uid dynamics (CFD) calculation which is matched with the far-¦eld propagation code using a description of the source with multipoles before undergoing classical acoustic propagation through atmosphere. The present paper reviews the theory of the near-to far-¦eld matching as well as the di¨erent resolution approaches and their limits. The impact of the resolution method on the ground propagated signal is also presented.

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“…[4][5][6][7] Uniformly reducing the errors associated with all local-error sources of the flow may not be optimal from an engineering context, where calculating an output functional may be of greater concern. An alternative method is to estimate the error in the calculation of a specified engineering output functional.…”

Section: Introductionmentioning

confidence: 99%

“…A constant-complexity scaling 7 can optionally be applied to M to allow the user to directly specify the size of the adapted grid. This size can be set to obtain an optimal grid that is computable with available resources.…”

mentioning

confidence: 99%

FUN3D and CFL3D Computations for the First High Lift Prediction Workshop

Park

Lee-Rausch

Rumsey

2011

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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Two Reynolds-averaged Navier-Stokes codes were used to compute flow over the NASA Trapezoidal Wing at high lift conditions for the 1 st AIAA CFD High Lift Prediction Workshop, held in Chicago in June 2010. The unstructured-grid code FUN3D and the structured-grid code CFL3D were applied to several different grid systems. The effects of code, grid system, turbulence model, viscous term treatment, and brackets were studied. The SST model on this configuration predicted lower lift than the Spalart-Allmaras model at high angles of attack; the Spalart-Allmaras model agreed better with experiment. Neglecting viscous cross-derivative terms caused poorer prediction in the wing tip vortex region. Output-based grid adaptation was applied to the unstructured-grid solutions. The adapted grids better resolved wake structures and reduced flap flow separation, which was also observed in uniform grid refinement studies. Limitations of the adaptation method as well as areas for future improvement were identified.

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High-order sonic boom modeling based on adaptive methods

Cited by 156 publications

References 29 publications

3D Parallel Anisotropic Unsteady Mesh Adaptation for the High-Fidelity Prediction of Bubble Motion

3D Parallel Anisotropic Unsteady Mesh Adaptation for the High-Fidelity Prediction of Bubble Motion

Impact of multipole matching resolution on supersonic aircraft sonic boom assessment

FUN3D and CFL3D Computations for the First High Lift Prediction Workshop

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