Summary: Control of Separation on the Flap of a Three-Element
High-Lift Configuration
B. G¨unther
and Frank Thiele
Berlin University of Technology, D­10623 Berlin, Germany
R. Petz
and W. Nitsche §
Berlin University of Technology, D­10587 Berlin, Germany
J. Sahner¶
, T. Weinkauf and H.-C. Hege
Zuse Institute Berlin, D­14195 Berlin, Germany
This paper describes a joint experimental and numerical investigation of the control
of the flow over the flap of a three-element high-lift configuration by means of periodic
excitation. At Reynolds numbers between 0.3 × 106
and 1 × 106
the flow is influenced by
periodic blowing or periodic blowing/suction through slots near the flap leading edge. The
delay of flow separation by periodic vertical excitation could be identified in the experiments
as well as numerical simulations based on the Unsteady Reynolds-averaged Navier-Stokes
equations (URANS). As a result, the mean aerodynamic lift of this practically relevant

Source: Andrzejak, Artur - Konrad-Zuse-Zentrum für Informationstechnik Berlin

Collections: Computer Technologies and Information Sciences