Add a Media Piece
 
default edit
Back to the Gallery
image of medium 113

Title: Vortices on an ogee nose-cone at incidence: upper surface

Description: On a highly swept thin wing at incidence, flow separation over a blunt but slender body presents, when placed at a high angle to the wind, an organized structure characterized by two symmetrical and steady vortices. It is the case for an axisymmetrical ogee nose cone, on which the vortices (in white on the image shown here) join up without being separated by a vortex-free median zone. Thanks to an illumination limited to a thin slit, it is possible to obtain a cross section view where the flow is visualized by air bubble suspended in the water (next image ), and the vortices are highlighted by colored emissions.

Image created by Henri Werlé. Reproduced with permission from his spectacular collection Courants et Couleurs published in 1974 by ONERA, the French Aerospace Lab.

For further information, see On the Flow of Fluids Made Visible, Henri Werlé, Leonardo, Vol. 8, No. 4. (Autumn, 1975), pp. 329-331.

Credits: Henri Werlé

References:

Web Page:

Contributed By:

 
The eFluids editor for videos is G. M. "Bud" Homsy (bud@math.ubc.ca)
and for images is Jean Hertzberg (Hertzberg@colorado.edu).
Please contact them if you have any problems, questions, or concerns related to the galley or videos and images.
© Copyright on the videos is held by the contributors.
Apart from Fair Use, permission must be sought for any other purpose.