C223 単チャンネル流路内スペーサ近傍の液膜流量分布測定による液膜挙動解析(OS-6 熱流動現象の計測およびデータ解析技術II)

概要

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For making clear the phenomena on the unsteady heat transfer with liquid film in two phase flow, the measurements are needed about unsteady film thickness and velocity profiles in the liquid film adding time-averaged values. It would be very important especially to estimate the dry out mechanism of liquid film experimentally on fuel rod around the spacer in the new fuel assembly of BWR. In this study, the unsteady velocity profiles would be estimated by the surface and flow velocity profiles, which were detected experimentally by the tracking of the visualizing particles with image processing. Measurement of film thickness is conducted to multi-points resistance probe to measure liquid film thickness profile in flow single channel. Flow rate is calculated unifying these two. As a result, it turned out that flow rate decreased immediately before spacer.
社団法人日本機械学会の論文
2005-11-02