Description du projet
Des simulations avancées pourraient permettre faire la lumière sur les changements dans la séparation de la couche limite
Financé par le Conseil européen de la recherche, le projet TRANSEP s’attaquera aux lacunes de la dynamique des fluides computationnelle dans le cadre de la prédiction de la physique complexe des écoulements associée à la transition de l’état laminaire à l’état turbulent et à la séparation des écoulements. En s’appuyant sur le calcul multi-pétascale, TRANSEP développera des méthodes de calcul permettant de prédire, de comprendre et de contrôler ces phénomènes d’écoulement complexes. La recherche mettra en lumière le comportement inattendu des zones laminaires sur les ailes, les changements spectaculaires dans les régions de transition de l’état laminaire à turbulent et de séparation sur les ailes instables, et l’interaction complexe des multiples régions de séparation et de transition sur les configurations d’ailes à grande portance.
Objectif
The vision spelled out in this proposal is to overcome the failure of Computational Fluid Dynamics to tackle one of the central unsolved fluid physics problems, namely predicting the sensitive flow physics associated with laminar-turbulent transition and flow separation. A recent, highly influential report by NASA (Slotnick et al., 2014) clearly states that the major shortcoming of CFD is its “… inability to accurately and reliably predict turbulent flows with significant regions of separation”, most often associated with laminar-turbulent transition.
The research proposed here will address this shortcoming and develop and utilize computational methods that are able to predict, understand and control the sensitive interplay between laminar-turbulent transition and flow separation in boundary layers on wings and other aerodynamic bodies.
We will be able to understand enigmas such as the recent results from the experiments of Saric et al. at the Texas A&M Univeristy where the laminar area of a wing grows after a smooth surface have been painted (increased roughness), or the drastic changes of laminar-turbulent transition and separation locations on unsteady wings, or the notoriously difficult interaction of multiple separation and transition regions on high-lift wing configurations. For such flows there have been little understanding of flow physics and few computational prediction capabilities. Here we will perform simulations that give completely new possibilities to visualize, understand and control the flow around such wings and aerodynamic bodies, including the possibility to compute and harness the flow sensitivities.
We will tackle these outstanding flow and turbulence problem using the new possibilities enabled by multi-peta scale computing.
Champ scientifique
- natural sciencescomputer and information sciencessoftware
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraft
- natural sciencescomputer and information sciencescomputational science
- natural sciencesphysical sciencesclassical mechanicsfluid mechanicsfluid dynamicscomputational fluid dynamics
Mots‑clés
Programme(s)
Thème(s)
Régime de financement
ERC-ADG - Advanced GrantInstitution d’accueil
100 44 Stockholm
Suède