The decay of 16Hz and 32Hz disturbance is weak in the near wall region near the disturbance source while damp tendency is more obvious in the outer region beyond logarithm-law layer, although the decaying tendency becomes more and more slow.
16Hz和32Hz的扰动在距离扰动源较近的近壁区衰减较弱,在对数律区以外的区域引起的衰减相对较强,但沿流向衰减趋势逐渐减弱。
参考来源 - 周期性人工扰动在湍流边界层衰减和演化的实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
It is found that generally the simulated values are in agreement with the DNS data in most flow regions, except in the near-wall region.
与DNS的统计值相比，除了近壁区之外，在流场的大部分区域，模拟值与精确的统计值基本一致。
The reverse flow region is observable near the pipe wall.
管壁附近存在明显的回流再附区；
The cascade aerodynamic performance is obviously improved in the region of middle blade, but the improvement of the cascade aerodynamic performance is not clear near the end wall region.
叶栅气动性能的改善主要在靠近叶展中部区域，而对角区核心区和端部区域的影响并不明显。
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