https://doi.org/10.1051/epjconf/202531802008
Measurement of hydrodynamic flow velocity by laser Doppler anemometer with different types of photodetectors
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
* Corresponding author: viatly.rakhmanov@gmail.com
Published online: 17 February 2025
The potential applications of three distinct photodetector types in laser Doppler anemometers for the measurement of hydrodynamic flow pulsations have been investigated. Laser Doppler anemometers with a classical vacuum photomultiplier tube, a multipixel silicon photomultiplier and a photomultiplier based on microchannel plates were used in the experiments. The main criteria for evaluating the quality of the Doppler signal were determined and analyzed for measuring the hydrodynamic flow velocity pulsations. The range of flow pulsations was from 1 to 50 Hz. In all experiments, laser Doppler anemometers demonstrated satisfactory performance when measuring pulsations up to 10 Hz. At frequencies from 10 to 50 Hz, the optimal results were achieved with laser Doppler anemometers employing photodetectors based on a silicon multipixel photomultiplier and a vacuum photomultiplier tube.
© The Authors, published by EDP Sciences, 2025
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