التفاصيل البيبلوغرافية
| العنوان: |
Effect of high- or low-speed fluctuations on the small-scale bursting events in an active control experiment. |
| المؤلفون: |
Cui, Xiao-Tong (AUTHOR), Jiang, Nan (AUTHOR) nanj@tju.edu.cn, Tang, Zhan-Qi (AUTHOR) zhanqitang@tju.edu.cn |
| المصدر: |
Chinese Physics B. Jan2021, Vol. 30 Issue 1, p1-9. 9p. |
| مصطلحات موضوعية: |
*BOUNDARY layer (Aerodynamics), *DATABASES, *TURBULENCE |
| مستخلص: |
Active control of a fully developed turbulence boundary layer (TBL) over a flat plate has been investigated with a statistical view. The piezoelectric (PZT) oscillator is employed to produce periodic input into the inner region of the TBL. A wall probe is fixed upstream of the oscillator to identify the high- or low-speed fluctuations as the detecting signals. Then, the impact of the detecting signals on the small-scale bursting process is investigated based on the data acquired by the traversing probe downstream of the oscillator. The results indicate that the small-scale bursting intensity is restrained more apparently at high-speed detecting fluctuations but less impacted at low-speed detecting fluctuations. Furthermore, the perturbed-scale fluctuations arrange the small-scale bursting process in the near-wall region. The detecting signals have an obvious impact on this arrangement, especially the high-intensity regions of the small-scale bursting events: the vibration enhances the intensity at high-speed detecting signals but weakens it at low-speed detecting signals in these regions, which gives a direct evidence on how detecting signals interfering the small-scale bursting process. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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