P. Scholz, J. Ortmanns, C.J. Kähler, R. Radespiel

This contribution describes the optimization procedure for an array of jet actuators, which are being studied in a low-speed wind tunnel. At first the results of the optimization of a single, isolated actuator are outlined. Based on these results an actuator array is being designed and the dependency of efficiency on the geometric parameters of the array (stagger, orientation) is quantified. The experiments indicate that a properly arranged actuator array can indeed amplify the impact on the surrounding boundary layer rather than to simply sum it. Intermediate or large spacings yield the best performance. For both configurations, diverging and converging slots, small spacings lead to massive interactions. But these excessively raise the viscosity and as a result the circulation decreases too quick. Larger spacings will still result in an amplification of the efficiency but without an unfavorable retroaction on the circulation and are therefore more favorable. In principle diverging slots are more e±cient than converging ones.

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

Conference Paper

englisch

21,0 x 29,7 cm, 11 Seiten

DGLR-Bericht, 2005, 2005-07, CEAS/KATnet Conference on Key Aerodynamic Technologies - Proceedings; S.1-11; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

in getr. Zählung;

aerodynamics

Bibliothek

2005