周期的擾乱を与えた水平二平板後流の乱流特性

（擾乱周波数とレイノルズ数の影響）

抄録

The purpose of this study is to clarify the effects of disturbance frequency and Reynolds number on the turbulence characteristics in the wake of flat parallel plates with periodic disturbance. In such a wake, it is known that the dominant frequency of velocity fluctuation in the near wake and it in the far wake are different. Therefore, we decided to visualize the vortex structure in the wake by using the phase averaging method based on each dominant frequency. As a result, it was found that the vortex structures change dynamically in the downstream direction because of vortex merging or disappearance.