Particle Image Velocimetry

Two-dimensional velocity measurements are made in a particle laden flow. A double pulsed laser sheet illuminates a two dimensional particle field. An imaging device takes a picture of the double exposed individual particles. Given a known pulse separation and a measured particle image separation, velocity values across the plane may be determined.

Typical Accuracy:

~5%

Requirements:

• Ninety Degree Dual Optical Access
• Seeding
• Image Processing

Select Wind Tunnels:

• BART
• Counter Flow Diffusion Flame
• Water Tunnel
• Mach 6 Tunnel
• Backward Facing Step

Potential Extensions:

We are currently examining Holographic PIV. This will allow the user to obtain three dimensional three component velocity data. Laboratory results look very promising.

Primary Limitations of PIV:

• Seeding
• Two-dimensional (potential for holographic recording)

Primary Advantages of PIV:

• Maturity
• Planar Measurements