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Visualization of Vortex Wake Interactions

Muijres, Florian LU ; Lentink, David; Oudheusden, B W Van and Leeuwen, J L Van (2005) In Proceedings of PSFVIP-5
Abstract
The fluid dynamics of insect wings and the fins and tails of fish are governed by vortex wake interactions, which are strongly related to the wing, fins and tail kinematics. By modeling the kinematics of these wings, fins and tails as a two-dimensionally flapping foil, the influence of the kinematics on the vortex wake interactions is studied. This is done by varying the non-dimensional advance ratio -which describes the amount of foil chord lengths traveled during one falling cycle- and keeping the other independent variables constant. The vortex wake interactions in the wake of the flapping foil as a function of the advance ratio were studied with so-called soap-film tunnel technique: a planar film of soap runs down between two wires at... (More)
The fluid dynamics of insect wings and the fins and tails of fish are governed by vortex wake interactions, which are strongly related to the wing, fins and tail kinematics. By modeling the kinematics of these wings, fins and tails as a two-dimensionally flapping foil, the influence of the kinematics on the vortex wake interactions is studied. This is done by varying the non-dimensional advance ratio -which describes the amount of foil chord lengths traveled during one falling cycle- and keeping the other independent variables constant. The vortex wake interactions in the wake of the flapping foil as a function of the advance ratio were studied with so-called soap-film tunnel technique: a planar film of soap runs down between two wires at constant flow velocity. In this soap-film the vorticity field in the wake of the flapping foil can directly be visualized using a high speed camera and monochromatic illumination. Different vortex wake pattern domains were found for various advance ratios. This shows that the vortex wake interactions are strongly related to the advance ratio as well as the behavior of the Leading Edge Vortex (LEV). At low advance (Less)
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publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
soap film, flapping flight
in
Proceedings of PSFVIP-5
publisher
5th Pacific Symposium on Flow Visualization and Image Processing
language
English
LU publication?
no
id
c00a1fd1-b2e4-4e40-b61c-b2075a0a32e6 (old id 1886248)
alternative location
http://www.mendeley.com/research/visualization-vortex-wake-interactions/
date added to LUP
2011-06-14 13:13:17
date last changed
2016-06-29 09:19:11
@inproceedings{c00a1fd1-b2e4-4e40-b61c-b2075a0a32e6,
  abstract     = {The fluid dynamics of insect wings and the fins and tails of fish are governed by vortex wake interactions, which are strongly related to the wing, fins and tail kinematics. By modeling the kinematics of these wings, fins and tails as a two-dimensionally flapping foil, the influence of the kinematics on the vortex wake interactions is studied. This is done by varying the non-dimensional advance ratio -which describes the amount of foil chord lengths traveled during one falling cycle- and keeping the other independent variables constant. The vortex wake interactions in the wake of the flapping foil as a function of the advance ratio were studied with so-called soap-film tunnel technique: a planar film of soap runs down between two wires at constant flow velocity. In this soap-film the vorticity field in the wake of the flapping foil can directly be visualized using a high speed camera and monochromatic illumination. Different vortex wake pattern domains were found for various advance ratios. This shows that the vortex wake interactions are strongly related to the advance ratio as well as the behavior of the Leading Edge Vortex (LEV). At low advance},
  author       = {Muijres, Florian and Lentink, David and Oudheusden, B W Van and Leeuwen, J L Van},
  booktitle    = {Proceedings of PSFVIP-5},
  keyword      = {soap film,flapping flight},
  language     = {eng},
  publisher    = {5th Pacific Symposium on Flow Visualization and Image Processing},
  title        = {Visualization of Vortex Wake Interactions},
  year         = {2005},
}