定常層流における直角分岐管内流れの可視化

概要

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In the present study, a secondary flow structure in a right angle branch has been expemimentally studied in laminar steady flow by flow visualization. A side branch 14 mm in diameter bifurcates at right angle from a trunk 24 mm in diameter, and both upstream and downstream corners at the entrance of the side branch are square edge. After bifurcating, the secondary flow is induced in the side branch and also a reversing flow is formed downstream of the upstream corner in the side branch. There is asymmetrical pair of large vortices in the side branch basically. There is another pair of small vortices within the side branch including the reversing flow immediately downstream of the upstream corner. Furthermore, in the region downstream of the reattachment point the symmetrical plane of vortices inclines with respect to the common median plane.
1999-06-25