Abstract: Artificial periodic disturbances are introduced to the outer field of turbulent boundary layer in an closed-circuit open water channel. Statistical method is employed for analyzing the velocity-fluctuation-time-series. The effect of the disturbance to turbulent structure in boundary layer is studied. The result indicates the She-Leveque hierarchical similarity exists among high frequency turbulence.

Key words: periodic vibration, turbulence, scaling law, hierarchical structure

摘要： 在开口式循环水槽底部湍流边界层外区中引入周期性扰动，对湍流场的速度脉动时间序列信号进行了统计分析，研究了湍流边界层中周期性人工扰动对湍流结构的影响，结果表明高频扰动的湍流中She-Leveque（简称SL）湍流层次相似律成立。

关键词: 周期性扰动, 湍流, 标度律, 层次结构