Measurements of pressure and velocity fluctuations in a family of turbulent separation bubbles

Abstract

Abstract

Periodic forcing of a large turbulent separation bubble

“…LeFloc'h et al. (2020) discuss the pressure distribution generated in the TFT boundary-layer wind tunnel in relation to other references from the literature.…”

“…The experimental techniques used in the present work were essentially the same as in Mohammed-Taifour & Weiss (2016) and LeFloc'h et al. (2020) and will only be described briefly. The average wall pressure was measured using two Scanivalve DSA3217 pressure scanners and the wall-pressure fluctuations with several Meggitt 8507C-1 piezoresistive pressure transducers.…”

“…The uncertainty in turbulence statistics, which depend on the total duration of the measurements, are for the mean streamwise velocity, for the mean wall-normal velocity, for the streamwise stresses, for the wall-normal stresses and for the shear stresses, respectively (LeFloc'h et al. 2020).…”

“…Mohammed-Taifour, Dufresne & Weiss (2019) and LeFloc'h et al. (2020) further investigated the three-dimensional nature of the average (unforced) flow through Reynolds-averaged Navier–Stokes simulations and interpreted the directions of the wall streamlines by classical secondary-flow arguments in the sidewall boundary layers.…”

“…Mohammed-Taifour & Weiss (2016) and LeFloc'h et al. (2020) report a value of in a family of incompressible, pressure-induced TSBs generated on a flat surface with a combination of adverse and favourable pressure gradients. This value is consistent with the low-frequency pressure fluctuations observed by Camussi et al.…”