Particle Image Velocimetry System in a Low Speed Wind Tunnel

This video shows a particle image velocimetry (PIV) system operating in a low speed wind tunnel at the UT Arlington Aerodynamics Research Center. The first clip shows particles slowly traveling into the path of the laser sheet from a seeding system placed upstream. When the wind tunnel is activated, the particles are carried away. The second clip shows the wind tunnel operating with seed continuously injected into the region of the boundary layer.

Category:

Science & Technology

Tags:

• particle
• image
• velocimetry
• wind
• tunnel
• PIV
• laser
• aerodynamics
• visualization

[velaroful]

PIV analysis of boundary layers is quite difficult due to unwanted laser light reflections. Did you use optical filters in combination with a fluorescent coated surface?

[emb8]

What is shown in the video would have too many reflections and not result in a good boundary layer profile (this was just the best way to get a video). Sometimes the filters and coatings work, but I've found for boundary layers that directing the laser sheet through a clear surface works well. Anything under the surface is then coated with a matte black finish. If the object is not flat and has a complicated geometry then usually good imaging is trial-and-error with all these techniques.

[30lll30]

Sweet stuff dude but still i don't see how u compensated for all the reflections

[andrawes1234]

what is this ?

[kartoffel13]

incredible

[ItzEzaii]

wow 4 thousand views and im the only person to coment?:O