212 可視化トレーサーの衝突流下プロセス解析による液膜速度分布測定法の開発

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. As the particles were impacted and moving on the surface with transferring the properties with/without diffusions in case of dye-tracer and solid-tracer, the time-special tracking with various methods indicate the position of impacts on the surface and flow in the fluid, which give the many useful information about time-spatial liquid film.
社団法人日本機械学会の論文
2003-08-15