抄録
The unsteady three-dimensional flow in the junction of circular cylinder and end wall has been investigated experimentally by the moving visualization and PIV measurement. The relative boundary layer thickness ?/d defined as the ratio of the laminar boundary layer thickness against the cylinder diameter was varied widely under the Reynolds number Re=1000. As the results, the three-dimensional flow includes the streamwise vortices near the end wall. In the case of large ?/d there cannot exist Kantian vortex shedding in the three-dimensional flow. But the case of small ?/d, the streamwise vortices are affected by Karman vortex shedding.
