EPJ Web of Conferences
Volume 25, 2012EFM11 – Experimental Fluid Mechanics 2011
|Number of page(s)||12|
|Section||Experimental Fluid Mechanics 2011|
|Published online||16 April 2012|
Visualization of boundary layer separation and passive flow control on airfoils and bodies in wind-tunnel and in-flight experiments
Institute of Thermomechanics, Academy of Sciences of
the Czech Republic, Dolejskova 5, Prague
8, Czech Republic
email@example.com ; firstname.lastname@example.org ; email@example.com ; Milan.Matejka@fs.cvut.cz ; firstname.lastname@example.org
2 Department of Applied Mathematics, CTU in Prague - Faculty of Transportation Sciences, Konviktska 20, Prague 1, Czech Republic
Infrared camera, 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 numbers transition mechanism. Airfoils of Wortmann FX66 series and FX66 series wing-fuselage interaction, as well as modern airfoils and their wing-fuselage geometry were subject to study. The presence of previously identified structures in the CFD modelling, such as horse-shoe vortices, was confirmed in the flow.
Wind-tunnels and in-flight measurements on sailplanes were carried out and effect of passive flow control devices - vortex generators - was surveyed; namely counter-rotating vortex generators and Zig-zag type turbulators were applied. Separation suppression and consequent drag coefficient reduction of test aircrafts was reached. PIV investigation was further extended by Time-Resolved techniques.
An important study on structure of the turbulent flow in the lower atmosphere, creating an environment of the soaring flight, was presented.
© Owned by the authors, published by EDP Sciences, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.