Feature-based Comparison of Flow Fields around a Three-element High-lift Configuration with Active Flow Control

The control of the flow over the flap of a three-element high-lift configuration is investigated numerically by solving the unsteady Reynolds-averaged Navier-Stokes equations (URANS). At a Reynolds number of Re = 1 · 10 6 the flow is perturbed by periodic blowing/suction through a slot near the flap leading edge. The main focus is on the mechanisms of separation control, for which flow field structures at two dierent excitation parameters are studied. The simulations are conducted using a swept wing of infinite span in order to study the impact of dierent excitation parameters. The method of feature-based extraction will be used to identify dominant large scale structures in the unforced and excited flow field.

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