Laser-Doppler Velocimetry (LDV)

  • R. Beauvais


The Laser-Doppler-Velocimetry (LDV) is an optical method to measure local flow parameters of transparent gaseous or liquid flows. Without explaining in more detail it should be noted that in a modified version the same technique can be applied to velocity measurements of surfaces of solids. In comparison to traditional flow measurement techniques, e.g., the hot wire anemometer or Prandtl probe, the LDV provides the following advantages:
  • The LDV method is non invasive. The flow being investigated is not disturbed by a probe. So flow measurements are possible in situations not suitable for conventional techniques, e.g. in internal combustion engines, or over long distances.

  • The determination of flow speeds is based on simple geometric correlations. A drift is not possible. So calibration measurements are not necessary.

  • The direction of the flow speed components being measured is determined by the optical arrangement.

  • The LDV technique makes a very high spatial and temporal resolution possible.

  • Special optical setups provide the possibility to record two or three velocity components simultaneously.


Frequency Shift Measuring Volume Flow Speed Doppler Frequency Fringe Pattern 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1994

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  • R. Beauvais

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