A Smooth Body, Large-Scale Flow Separation Experiment

摘要

Experiments focused on providing archival data for improved modeling of smooth body flow separation are presented. The flow separation occurs on a fixed convex ramp geometry with the imposed adverse pressure gradient controlled by a fully adjustable flexible top wind tunnel ceiling. Two cases are considered: the first gives rise to large-scale flow separation with reattachment downstream of the convex ramp. The second case involves both separation and reattachment on the ramp surface. It is demonstrated that the flow physics is largely governed by an embedded shear layer associated with the outer mean velocity inflection point. Mean velocity similarity in both experiments is achieved by means of embedded shear layer scaling. However, the turbulence intensity is shown to depend critically on local wall curvature.