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Time Resolved PIV Systems

Time Resolved PIV Systems. Time Resolved PIV system. A global imaging system that has the ability to capture image fields (velocity fields) at orders of magnitude faster than standard PIV systems A PIV system that makes flow measurements with very high update rates

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Time Resolved PIV Systems

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  1. Time Resolved PIV Systems

  2. Time Resolved PIV system • A global imaging system that has the ability to capture image fields (velocity fields) at orders of magnitude faster than standard PIV systems • A PIV system that makes flow measurements with very high update rates • Can provide information about • Flow dynamics, flow transport • Motion of structures in the flow • An integrated system with high frame rate camera and high speed pulse laser

  3. Time Resolved PIV system • Provides instantaneous flow fields - Spatial and temporal nature of the flow field • Special algorithms form TSI (e.g., Hart Correlation) • to increase spatial resolution (more flow details, structures in the flow) • Interest in knowing evolution of the flow • Need to make velocity measurements with high update rate, typically in KHz or higher • Time Series Analysis package • Provides Time history, time series plots, statistics and spectrum analysis

  4. Time-resolved measurementsHigh Frame-rate StereoPIV System

  5. System Components • High Repetition rate Laser • Model YLF-HS dual laser • Model YAG-HA single laser • Laser light sheet optics • High Speed camera system • Photron SA3 Series Cameras • Model 610035 LaserPulse Synchronizer • Stereoscopic assembly • Insight 3G image capture and analysis package

  6. Example High Speed Camera System • High Frame rate camera with integrated sensor protective mask and F-mount lens mount. The camera system included the Nikon 28 mm lens and all interface cables. • Pixel resolution 1024 by 1024 pixels • Sensor type CMOS • Dynamic range 12-bit • Frame rate per second 2000 (1024 x 1024 pixels) • 4000 (1024 x 512 pixels) • 6000 (512 x 512 pixels) • 8000 (1024 x 256 pixels) • 20000 (256 x 256 pixels) • Memory Up to 8GB • Communication Gigabit Ethernet

  7. INSIGHT 3G software • Configure for single and stereo arrangement of PIV systems • Image capture and analysis • Incorporated with Matlab for Time Series analysis to provide time history, time series, statistics and spectrum analysis • Direct link to TecPlot for vector fields presentation

  8. Time-resolved measurementsHigh Frame Rate System INSIGHT 3G

  9. Analysis of MDI spray

  10. Time Resolved PIV

  11. Time Resolved PIV

  12. Time Resolved PIV

  13. Time Resolved PIV

  14. Measurements in Engines Courtesy: University of Orleans

  15. Time Resolved MicroPIV System

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