R. Petz, W. Nitsche, R. Becker, R. King

Experimental investigations on active separation control on a two dimensional generic high-lift configuration were conducted in order to enhance maximum lift and overall aerodynamic performance. A pulsed jet near the leading edge of the single slotted flap was used for flow excitation in order to suppress separation on the flap at high deflection angles or to reattach an already separated flow [1, 2]. Lift and drag were improved substantially resulting in lift to drag ratio benefit of 20-25%. Additional experiments were conducted in order to apply a closed-loop separation control which proved to be very successful. An adaptive control method, namely the extremum seeking controller, yielded the best results in a multiple-input multipleoutput setup. The closed-loop case even improved the lift gain when compared to the open-loop results.

CEAS/KATnet Conference on Key Aerodynamic Technologies, Bremen, 2005

Conference Paper

englisch

21,0 x 29,7 cm, 8 Seiten

DGLR-Bericht, 2005, 2005-07, CEAS/KATnet Conference on Key Aerodynamic Technologies - Proceedings; S.1-8; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

in getr. Zählung;

aerodynamics

Bibliothek

2005