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Schéma à pas de temps caractéristique pour l'aérodynamique transsonique et conception aéroélastique
optimale d'aile de grand allongement

Abstract : The MBDA Aerolog software is commonly used for computing steady compressible flows over complex geometries. The residual-distribution scheme of Lax-Wendroff-Ni is coupled with an implicit residual smoothing technique to provide a low cost per iteration and a flexible use in multi-block computational domains. In order to improve the code efficiency for the simulation of unsteady flows a so-called characteristic timestep upwind scheme is proposed in this work: its compact stencil allows to preserve the existing boundary and interface treatments. This scheme is coupled with a new matrix-free implicit stage and applied in the framework of a dual time-step technique. The results provided by this new approach are analyzed from the viewpoint of accuracy and efficiency for steady and unsteady flows over airfoils and rudders and compared with those produced by the existing method. The optimal design of a wing is studied next in the context of static aeroelasticity: since the wings of a cruise missile are hollowed out, one seeks to take advantage of the associated aeroelastic effects to maximise the range of the missile. A fully automated aeroelastic computational chain is developed to perform a numerical study of these effects and a first parametric study is carried out to assess the relevance of the chosen parameters and the accuracy of the methods employed.
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https://pastel.archives-ouvertes.fr/tel-00144844
Contributor : Pascal Joubert de la Motte <>
Submitted on : Saturday, May 5, 2007 - 3:47:30 PM
Last modification on : Monday, October 19, 2020 - 10:53:40 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 11:38:58 PM

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  • HAL Id : tel-00144844, version 1

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Pascal Joubert de la Motte. Schéma à pas de temps caractéristique pour l'aérodynamique transsonique et conception aéroélastique
optimale d'aile de grand allongement. Autre. Arts et Métiers ParisTech, 2007. Français. ⟨NNT : 2007ENAM0005⟩. ⟨tel-00144844⟩

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