Abstract
A new optical method for determining flow-velocity vector fields that allows investigations of unsteady and fast processes is described. The method is based on measuring the displacements of turbulent structures, which are visualized in a light sheet, within a fixed time interval between consecutive video frames. The method was tested using measurements of pulsating-flow velocity. It was shown that the difference between the mean flow velocity in the investigated flow measured using this method and a hot-wire anemometer does not exceed 1%, while the deviation of the rms velocity pulsations is within 4.5%.
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Original Russian Text © N.I. Mikheev, N.S. Dushin, 2016, published in Pribory i Tekhnika Eksperimenta, 2016, No. 6, pp. 114–122.
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Mikheev, N.I., Dushin, N.S. A method for measuring the dynamics of velocity vector fields in a turbulent flow using smoke image-visualization videos. Instrum Exp Tech 59, 882–889 (2016). https://doi.org/10.1134/S0020441216060063
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DOI: https://doi.org/10.1134/S0020441216060063