DOI: 10.1615/TSFP7
WALL PRESSURE AND CONDITIONAL FLOW STRUCTURES IN THE REATTACHMENT REGION OF THE FLOW OVER A THICK PLATE
RÉSUMÉ
The separating and reattaching flow over a thick plate with sharp angle at Re = 80000 is investigated using pressure and HS-PIV measurements. After having studied the mean flow properties, which are found in good agreement with the litterature, a particular emphasis is given concerning the eduction and the analysis of the evolution of the large scale vortices downstream of the reattachment. This is done using an adapted multi-time and multi-channel stochastic estimation of the velocity correlated with the wall pressure. Swirling strength and Finite Time Lyapunov Exponents are then used in order to detect and characterize the structures and their dynamics. Conditional statistics based on the feature longitudinal position are then computed in order to educe intensities, size, position and convection velocity of each conditional feature.