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Development of Doppler Global Velocimetry as a Flow Diagnostics Tool
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Three Component Doppler Global Velocimeter Measurements of the Flow Above a Delta Wing
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Doppler Global Velocimeter Measurements of the Vortical Flow Above A Thin Delta Wing
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Doppler Global Velocimetry - A New Way to Look at Velocity
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Assessing the Capability of Dopplar Global Velocimetry to Measure Vortical Flow Fields
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Doppler Global Velocimetry (DGV)
 DGV is a non-intrusive measurement technology that can provide global, multi- or single- point velocity measurements. The technology can provide three-component velocity measurements at video rates (global), or greater than 100 kHz sample rates (point).
The technology does not require resolution of individual particles, nor is it a single particle per measurement method. Average of optical frequency, not Doppler frequency. Doppler Global Velocimetry Test
Instantaneous global measurements can be obtained using a Nd:YAG laser. Continuous point measurements can be obtained with Argon ion or CW nd:YAG lasers (Iodine) or laser diodes (Cesium).
DGV Optical Configuration:
Typical Accuracy:
The typical accuracy of Doppler Global Velocimetry is 5%.
Requirements:
- Multiple Optical Access
- Seeding
- Image Processing
Primary Limitations of Doppler Global Velocimetry:
Primary Advantages of Doppler Global Velocimetry:
- Planar
- Simultaneous Three Components
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