1 十字形配置2円柱の間隙内流の画像計測
1994 年 14 巻 Supplement1 号 p. 13-16
詳細
1994 年 14 巻 Supplement1 号 p. 13-16
A flow field in a gap between two crossed circular cylinders was visualized by the use of tracer particles, and was analyzed by the image processing. The Reynolds number was kept at about 500 for all experiments. The profile of velocity vectors in a gap flow was measured by the particle image tracking vclocimetry. As the results, the characteristics of the vortex structure in the gap was clarified. In the case of smallest gap, there are none of vortices in the gap. In the middle gap between G/d=0.269 and 0.385, the quasi-steady necklace vortex or the periodical necklace vortex is formed. In the critical gap of G/d=0.7-0.8, the quasi-steady twin vortex is formed.
