気泡流中の物体により誘起される二相対流の画像計測 : 流体工学,流体機械

概要

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This paper concerns with flow visualization and image measurement of bubbly flows around several shapes of obstacle. Coaxially confined twin rectangular tanks are constructed in order to provide a wide two-dimensional uniform bubble distribution upstearm of the obstacle. The experiments show that a quite large two-phase convection is induced by inserting the obstacle into the bubbly flow. Spatial scale of the two-phase convection depends on the shape of the obstacle as well as its arrangement. Measurement results of void fraction, bubble velocity and liquid phase flow, which are obtained by PIV and PTV, explores the detailed mechanism of generating the convection. Especially, the interaction between accumulated bubbles in upstream the object and downward liquid flow behind the object determines the scale of the two-phase convection.
一般社団法人日本機械学会の論文
2001-06-25