Boundary Layer Transition, Separation and Flow Control on Airfoils, Wings and Bodies in CFD, Wind-Tunnel and In-Flight Studies

0367420 - ÚT 2012 RIV NL eng J - Journal Article
Popelka, Lukáš - Matějka, M. - Šimurda, David - Součková, Natálie
Boundary Layer Transition, Separation and Flow Control on Airfoils, Wings and Bodies in CFD, Wind-Tunnel and In-Flight Studies.
Technical Soaring. Roč. 35, č. 4 (2011), s. 97-104. ISSN 0744-8996
R&D Projects: GA MŠMT(CZ) 1M06031; GA AV ČR IAA2076403; GA ČR GA101/08/1112
Institutional research plan: CEZ:AV0Z20760514
Keywords : airfoil * wing-fuselage interaction * flow control
Subject RIV: BK - Fluid Dynamics

Particle Image Velocimetry, smoke-wire, tuft filaments and oil-flow visualization techniques were used for wind-tunnel and in-flight investigation of boundary layer separation, both stall and separation bubbles, related to the low-Reynolds number transition mechanism. Airfoils of three Czech-designed sailplanes and their wing-fuselage interaction were subject to study. The combination of experimental results with those of numerical modeling greatly facilitated the understanding of the various phenomena. The effects of several passive flow control devices, vortex generators, counter-rotating vortex generators, and zig-zag type turbulators were considered. Separation suppression was reached and consequent drag coefficient reduction of test aircrafts measured in flight. Investigation was further extended by PIV Time-Resolved technique.
Permanent Link: http://hdl.handle.net/11104/0202118