C222 色彩場中の固体粒子・気泡可視化トレーサー移動検出による速度場測定(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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The phenomena of the turbulent coherent structures and collapse of vortex are indispensable to realize high performance in heat transfer with a small pressure loss. Not only time-mean thermo- and fluid-dynamics but also unsteady and sequential 3D-phenomena are very important to study and control these phenomena in engineering applications. The most percentage of heat transfer enhancement were given birth for very short time period, when the turbulent structure just come and make effect on the heat transfer field near wall. But the time-dependent correlations between unsteady fluid and heat transfer fields are still unknown, which are most interesting and exciting to investigate experimentally. In this study, the three-dimensional velocity measurement system would be improved with multi-color field by the illumination optics for liquid crystal projectors and image processing for the detection of 3-D velocity vector. The unsteady collapse processes of periodic vortex by plate are investigated near wall region on the plane, and are shown by graphic figures.
一般社団法人日本機械学会の論文
2005-11-02