Sensitivity analysis of the leading global modes of the flow around a NACA 4412 airfoil - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Sensitivity analysis of the leading global modes of the flow around a NACA 4412 airfoil

Résumé

Two- and three-dimensional modes developing on a steady spanwise-homogeneous laminar separated flow over a NACA 4412 airfoil have been numerically investigated using global linear stability theory. Considering variations of both the Reynolds number and the angle of attack, the two-dimensional von Kármán mode results to be always the leading mode since for all conditions examined it is more unstable than the three-dimensional von Kármán modes and the three-dimensional stationary modes, associated with the formation on the airfoil surface of large-scale separation patterns akin to stall cells. Sensitivity of the global modes is investigated numerically through adjoint-based methods in order to predict regions of the flow which are most sensitive to a modification of the base flow and the application of a steady force. Interestingly, the instability’s growth rate sensitivity function displays an extended region upstream of the separation bubble wherein a streamwise oriented force has a net stabilizing effect. Aerodynamic performances can thus be possibly improved by leveraging the boat-tailing effect induced by tangential jet actuators localized in this particular region of the flow
Fichier principal
Vignette du fichier
AIAA_numerical_paper.pdf (6.31 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03592554 , version 1 (01-03-2022)

Identifiants

Citer

Gabriele Nastro, Jean-Christophe Robinet, Jean-Christophe Loiseau, Pierre-Yves Passaggia, Lucien Baldas, et al.. Sensitivity analysis of the leading global modes of the flow around a NACA 4412 airfoil. AIAA SCITECH 2022 Forum, American Institute of Aeronautics and Astronautics, Jan 2022, San Diego, CA, United States. pp.2022-0455, ⟨10.2514/6.2022-0455⟩. ⟨hal-03592554⟩
69 Consultations
64 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More