E112 迎角を持つ平板伴流内の渦の三次元化(E-11 遷移と不安定性(1),一般講演)

概要

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The three-dimensional deformation of the vortices behind a two dimensional body was investigated by using flow visualization technique. In the case of a flat plate perpendicular to the uniform flow, the wavy deformation of the vortex filament was observed in the far wake. In the case of a inclined plate, the rib structures appeared in regular intervals to the axial direction of a vortex filament in the near wake. The ribs enclose a pair of vortex filaments which are shed alternately from both sides of a plate. The absolute value of circulation of alternate vortex was different from each other in a pair of vortices in the case of inclined plate. It seems that three dimensional deformation of vortex in the near wake is caused by difference of circulation of alternate vortex. The similar phenomenon was observed in the wake behind a circular cylinder oscillating in the direction of flow.
日本流体力学会の論文
2004-08-09