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Applied Optics

Applied Optics


  • Vol. 39, Iss. 10 — Apr. 1, 2000
  • pp: 1505–1510

Coherent detection in Doppler global velocimetry: a simplified method to measure subsonic fluid flow fields

Jeremy Coupland  »View Author Affiliations

Applied Optics, Vol. 39, Issue 10, pp. 1505-1510 (2000)

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The principles of an entirely new method to demodulate Doppler signals in Doppler global velocimetry (DGV) are discussed. The method makes use of coherent detection and streak imaging to record both temporal and spatial information on a single image. The method retains the simplicity of the basic DGV technique yet increases its applicability to subsonic flow regimes. The combination of a straightforward optical configuration and the ability to collect large data sets efficiently make this technique particularly useful in high-cost experimental facilities such as wind-tunnel testing where large quantities of data must be collected in a relatively short time period.

© 2000 Optical Society of America

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(280.2490) Remote sensing and sensors : Flow diagnostics
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry

Original Manuscript: September 27, 1999
Revised Manuscript: January 4, 2000
Published: April 1, 2000

Jeremy Coupland, "Coherent detection in Doppler global velocimetry: a simplified method to measure subsonic fluid flow fields," Appl. Opt. 39, 1505-1510 (2000)

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