円柱に施した横溝が抗力低減に及ぼす影響

抄録

Recently, many studies have discussed the characteristics of flow around a circular cylinder, for especially shape modification and drag coefficient. In this paper, the two-dimensional aerodynamic flow characteristics around a circular cylinder are investigated. Cylinders with various groove depth are used. The drag coefficient is measured with a wind tunnel test. From the results, it is clarified that the separation point of the horizontal section of the circular cylinder moves to downstream and the drag coefficient decrease, as groove become deeper. It is found that the drag coefficient with groove decreased by about 28.6% in compared without groove.