Experiments in Fluids

, Volume 43, Issue 2, pp 223–232

Single-camera Doppler global velocimetry based on frequency modulation techniques

  • Harald Müller
  • Michael Eggert
  • Jürgen Czarske
  • Lars Büttner
  • Andreas Fischer
Research Article

DOI: 10.1007/s00348-007-0353-8

Cite this article as:
Müller, H., Eggert, M., Czarske, J. et al. Exp Fluids (2007) 43: 223. doi:10.1007/s00348-007-0353-8

Abstract

The main advantage of the described Doppler global velocimeter (DGV) systems based on frequency modulation (FM) or frequency shift keying (FSK) is that no reference detector is required. The frequency variation of the laser light during one modulation period additionally allows an on-line calibration of the complete DGV system. Thus, the new method has the potential to reduce the uncertainty of conventional DGV velocity measurements since time resolved velocity field measurements on a spinning disc have shown standard deviations down to 0.02 m/s. On investigating flow fields, velocity components notably less than 0.5 m/s were resolved.

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Harald Müller
    • 1
  • Michael Eggert
    • 1
  • Jürgen Czarske
    • 2
  • Lars Büttner
    • 2
  • Andreas Fischer
    • 2
  1. 1.Department Gas Flow 1.4Physikalisch-Technische BundesanstaltBraunschweigGermany
  2. 2.Department of Electrical Engineering and Information TechnologyTU DresdenDresdenGermany

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