Measurement of flow velocity distributions by pulse luminescence method

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Abstract
To visualize and measure quantitatively flow velocity distributions, a luminescence method which uses a pulse light was investigated. A method by which flow velocity can be measured regardless of the widths of excitation time and photograph exposure time was developed. Some optical and fluid characteristics of glycerin aqueous solutions in which luminescence particles are well dispersed are reported. The spatial resolving power of this method was found to be 100-300 mu m. The apparatus which has mechanical shutters with rotating discs was used to measure the velocity distribution of two-dimensional flows.