F212 自動回転運動する楕円柱周りの流れと非定常流体力発生機構に関する研究(F-21 大迎角物体まわりの非定常・剥離流(2),一般講演)

概要

論文の詳細を見る
The flow around and the mechanism of unsteady fluid-dynamic forces acting on an auto-rotating elliptic cylinder were investigated by the experiment using wind tunnel and the two-dimensional numerical simulation. The visualization of flow around the auto-rotating cylinder were carried out by the same rotating frequency and falling velocity as the auto-rotating cylinder. The validity of the computation was confirmed through the comparison with the experimental result. The time variation of the vortex shedding from the cylinder is shown by computational results and it was found that the flow pattern periodically repeats in every half cycle and at -110 degree, the three vortices exist in the wake of the cylinder. The drag and lift coefficients acting on the cylinder were estimated by both the numerical result and complex velocity potential theory. It was found that the phenomenon of the lift coefficient at 0 degree are caused by the rotation of the cylinder.
日本流体力学会の論文
2004-08-09