Structure of a Turbulent Boundary Layer Interacting with Longitudinal Vortex Arrays (Feature of Longitudinal Vortex and Vorticity Profiles)

摘要

An experiment study of a turbulent boundary layer that interacts with controlled longitudinal vortex arrays is presented. A row of vortices is produced by thin airfoils placed side by side in free stream. Five cases have been considered in which the spanwise period of vortices and their height are varied. The results show a very strong effect of the spanwise period as well as a notable effect of the height at which vortices are positioned. Namely, the spanwise period controls the vortex path and the vortices interaction with each other.