Objectif Industrial, economical and environmental interests are at stake in the research efforts concerning the optimisation of the shape of aircraft wings so to obtain low aerodynamic drag. For a computational method to be reliable as a design process, it must be based on a mathematical model, which provides an appropriate representation of the significant features of the flow, such as shock waves, boundary layers and laminar-to-turbulent transition. The total drag of an aircraft wing is mainly given by the sum of pressure or wave drag, related to the existence of shock waves, and viscous drag, whose magnitude depends on whether the flow on the wing is laminar or turbulent. Turbulent flow produces a much larger drag; thus important research efforts have been devoted to keeping the flow laminar over the largest possible portion of the wing surface, which when accomplished, translates directly to less pollution and reduced expenses. Two main objectives characterize this project. The first is to increase the fundamental understanding of spatial transient growth as a scenario for laminar/turbulent transition. Within the scope of this objective, the existing theory will be extended to account for three-dimensional, compressible, boundary-layer flow on either flat plates (in the fundamental studies) or curved surfaces (for the case of realistic applications). The second objective is to incorporate the newly developed model of spatial transient growth as a transition prediction method in shape optimisation in order to enable the design of slender bodies with low drag. Here, gradient based optimisation will be used and the gradients will be efficiently evaluated, despite the large number of degrees of freedom, using the adjoin of the governing equations. The efficiency is in particular important when aiming for industrial applications and increased European competitiveness. Champ scientifique engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraftnatural sciencescomputer and information sciencescomputational sciencenatural sciencesmathematicspure mathematicsgeometrynatural sciencesphysical sciencesopticsfibre opticsnatural sciencesmathematicsapplied mathematicsmathematical model Mots‑clés Laminar adjoint modal growth non optimization turbulent transition Programme(s) FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006 Thème(s) MOBILITY-2.1 - Marie Curie Intra-European Fellowships (EIF) Appel à propositions FP6-2002-MOBILITY-5 Voir d’autres projets de cet appel Régime de financement EIF - Marie Curie actions-Intra-European Fellowships Coordinateur UNIVERSITA DEGLI STUDI DI SALERNO Contribution de l’UE Aucune donnée Adresse Via Ponte Don Melillo 1 FISCIANO Italie Voir sur la carte Coût total Aucune donnée