球および円柱の後流の可視化
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概要
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Many investigators have precisely carried out the measurements of drag forces on a sphere and a cylinder. However, it has been difficult to expound the theory of the drag forces, because of the pressure drag caused by a separation flow. The separation point changes according to Reynolds number, and follows a wake flow. This wake is formed Karman vortex street, which is caused a vibration force by its alternate wakes. In this paper, visualization experiments have been carried out to observe the separation point and Strouhal number of spheres and cylinders. A hydrogen bubble method and a dye injection technique have been applied to visualize the separation point and the wake flow in this experiment.
- 福井工業大学の論文
- 2006-03-18