Secondary instability of a swept-wing boundary layer disturbed by controlled roughness elements
Artikel i vetenskaplig tidskrift, 2010

Wind-tunnel data on velocity perturbations evolving in a laminar swept-wing flow under low subsonic conditions are reported. The focus of the present experiments are secondary disturbances of the boundary layer which is modulated by stationary streamwise vortices. Both the stationary vortices and the secondary oscillations of interest are generated in a controlled manner. The experimental data are obtained through hot-wire measurements. Thus, evolution of the vortices, either isolated or interacting with each other, is reconstructed in detail. As is found, the secondary disturbances, initiating the laminar-flow breakdown, are strongly affected by configuration of the stationary boundary-layer perturbation that may have an implication to laminar-turbulent transition control.

growth

cross-flow vortices

Swept wing

Secondary instabilities

Streamwise vortices

control

stability

Transition

transition

Författare

Valery Chernoray

Chalmers, Tillämpad mekanik, Strömningslära

A. V. Dovgal

Russian Academy of Sciences

V. V. Kozlov

Russian Academy of Sciences

Lennart Löfdahl

Chalmers, Tillämpad mekanik, Fordonssäkerhet

Journal of Visualization

1343-8875 (ISSN) 1386-6478 (eISSN)

Vol. 13 3 251-256

Ämneskategorier

Maskinteknik

DOI

10.1007/s12650-010-0035-0

Mer information

Senast uppdaterat

2021-08-13