P.W.C. Wong, M. Maina, G.C. Doig

The application of the Hybrid Laminar Flow Control technique (HLFC) to delay transition combined with micro-blowing in the turbulent boundary layer in order to reduce the drag of civil transport aircraft has been investigated. The possibility of using a single plenum chamber with varying porosity to alleviate the effect of pressure gradient on the surface suction velocity distribution in the leading edge region has been shown. The quantity of air required for surface suction for controlling transition in HLFC is used for micro-blowing further downstream in the turbulent flow region. It has been shown that although micro-blowing reduces skin friction, it increases the boundary layer momentum thickness and viscous drag. The effects of micro-blowing on the overall aerofoil aerodynamic performance have been quantified.

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