PASSIVE CONTROL OF BOUNDARY LAYER TRANSITION AND SEPARATION

0353304 - ÚT 2011 RIV CZ eng C - Conference Paper (international conference)
Popelka, Lukáš - Matějka, M. - Šimurda, David - Součková, Natálie
PASSIVE CONTROL OF BOUNDARY LAYER TRANSITION AND SEPARATION.
International Conference Experimental Fluid Mechanics 2010. Vol. 1. Liberec: Technical University of Liberec, 2010 - (Vít, T.; Dančová, P.), s. 534-544. ISBN 978-80-7372-670-6.
[International Conference Experimental Fluid Mechanics 2010. Liberec (CZ), 24.11.2010-26.11.2010]
R&D Projects: GA MŠMT(CZ) 1M06031; GA AV ČR(CZ) IAA200760614; GA ČR GA103/09/0977; GA ČR GA101/08/1112
Institutional research plan: CEZ:AV0Z20760514
Keywords : passive flow control * airfoils and wings * CFD and experiment synthesis
Subject RIV: JU - Aeronautics, Aerodynamics, Aircrafts

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. Experimental data were coupled with numerical modeling and synthesis gained. Effect of passive flow control devices - vortex generators - was surveyed, counter-rotating vortex generators and Zig-zag type turbulators were applied. 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/11104/0192587