On flow-acoustic resonant interactions in transitional airfoils - Archive ouverte HAL Access content directly
Journal Articles International Journal of Aeroacoustics Year : 2014

On flow-acoustic resonant interactions in transitional airfoils


We discuss our recent experimental and preliminary numerical efforts examining resonant feedback mechanism of flow-acoustic interactions in airfoil transitional boundary layers. Experimentally recorded unsteady responses of loaded, transitional NACA0012 airfoil with tripped suction or pressure sides confirm the presence of shifted ladder-type tonal structures with dual velocity dependence in the acoustic signal previously reported in the literature. The installation of upstream grid generating low-intensity turbulence appears to eliminate the feedback mechanism leaving just a single velocity dependence for the dominant spectral components. Complementary numerical efforts employ a high-order Navier-Stokes solver implementing low-pass filtering of poorly resolved high-frequency solution content to retain numerical accuracy and stability over the range of transitional flow regimes. Within the scope of 2D analysis, the conducted numerical experiments particularly investigate the behavior of the boundary-layer statistical moments during the transitional flow regimes characterized by the presence of the acoustic feedback, and address sensitivity of the latter to the flow Reynolds number.
Fichier principal
Vignette du fichier
GOLUBEV_IJA_2014.pdf (7.11 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-01136616 , version 1 (11-04-2016)



Vladimir V. Golubev, Lap Nguyen, Reda R. Mankbadi, Michel Roger, Miguel R. Visbal. On flow-acoustic resonant interactions in transitional airfoils. International Journal of Aeroacoustics, 2014, 13 (1-2), pp.1-38. ⟨10.1260/1475-472X.13.1-2.1⟩. ⟨hal-01136616⟩
65 View
95 Download



Gmail Facebook X LinkedIn More