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Fluid flow in a small model of a Francis-type pump turbine was visualized by means of a tracer method and was pictured using a video camera rotating with the runner. Several kinds of pattern image pro...cessing measurements are reviewed and one method based on a correlaion method is applied to get the relative velocity vectors of the fluid flow in a rotating impeller from the video images. The problems which occur in the image processing measurement and the countermeasures are discussed.続きを見る
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