Measurement of non-stationary flows in fluidic elements by the laser-Doppler velocimeter with variable optical frequency shift
Abstract
The study deals with a laser-Doppler velocimeter with variable frequency shift, which uses two acoustooptic modulators to measure the flow velocity in fluidic elements. The optical system can be readily aligned to measure velocity and turbulence components. Amplification of the output signal from the photomultiplier is easy to accomplish. Experiments in which the instrument was used to study the influence of turbulence on the dynamic switching of jet flows are discussed.
- Publication:
-
5th Biennial Symposium on Turbulence
- Pub Date:
- 1979
- Bibcode:
- 1979turb.symp..107N
- Keywords:
-
- Flow Measurement;
- Fluidic Circuits;
- Frequency Shift;
- Laser Doppler Velocimeters;
- Unsteady Flow;
- Acousto-Optics;
- Light Modulation;
- Switching;
- Instrumentation and Photography