annular tank circulating flow water tank circulating water channel circulating water flume circulation water cha el circulation water channel water circulating channel water-circulating channel
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 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。
