F233 乱流渦輪への遷移に関する実験

概要

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A vortex ring is one of the fundamental motions of fluid with vorticity. In the experiments on vortex ring in water, mechanical method such as piston are employed traditionally, which enables us to generate a vortex ring with Reynolds number in the order of ∿(10)^4 at maximum. In this study, we employ an exploding wire method which enables to generate higher Reynolds number region than the mechanical method. In the previous paper, we have observed a laminar vortex ring with the Reynolds number even in the order of (10)^5. By increasing the vorticity, a vortex ring is divided into multiple vortex ring and mutual slip-through of vortex rings are observed. In this paper, we generate a turbulent vortex ring by external disturbance and study the formation and propagation process of a turbulent vortex ring experimentally.
日本流体力学会の論文
2001-07-31