Original title:
PASSIVE CONTROL OF BOUNDARY LAYER TRANSITION AND SEPARATION
Authors:
Popelka, Lukáš ; Matějka, M. ; Šimurda, David ; Součková, Natálie Document type: Papers Conference/Event: International Conference Experimental Fluid Mechanics 2010, Liberec (CZ), 2010-11-24 / 2010-11-26
Year:
2010
Language:
eng Abstract:
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.
Keywords:
airfoils and wings; CFD and experiment synthesis; passive flow control Project no.: CEZ:AV0Z20760514 (CEP), 1M06031 (CEP), IAA200760614 (CEP), GA103/09/0977 (CEP), GA101/08/1112 (CEP) Funding provider: GA MŠk, GA AV ČR, GA ČR, GA ČR Host item entry: International Conference Experimental Fluid Mechanics 2010, ISBN 978-80-7372-670-6
Institution: Institute of Thermomechanics AS ČR
(web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences. Original record: http://hdl.handle.net/11104/0192587