2028 渦輪変形過程の流れ模様

概要

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The structure of a vortex ring in deformation process were investigated by means of smoke visualization technique. The photographs of the flow pattern of a section perpendicular to the axis of a vortex ring were taken continuously with a high-speed video camera. The solid picture of a vortex ring was obtained by constructing these photographs with a computer graphics tool. As the vortex ring travelled downstream, the circumferential distortion of a solid picture appeared regularly on its surface and grew into the polygon. At final stage, i.e., just before collapse of the vortex ring, it seemed that a pair of rings might enclose the vortex core of vortex ring. These pair of rings were not combined with the vortex core. The pair of rings may be constructed of a small pair of vortex ring which are generated due to the centrifugal instability.
社団法人日本機械学会の論文
2000-07-31