Écoulement pariétal généré par un ensemble de jets rencontrant une surface plane

Abstract

The impingement of 15 round air jets on a plane wall leads to the formation of cells revealed by the spreading-over method on the impinged surface. The network of reattachment and detachment lines is the direct consequence of vortical structures appearing during the impingement. Their main characteristics are their horse-shoe shape and their three-dimensional aspect which is revealed by laser sheet visualisations. All these results allow us to make a schematic diagram of the flow.