Abstract
By use of the LDV, experimental investigation was carried out for a turbulent boundary layer which was disturbed with an electric-magnetic vibrating ribbon. It is found that, in the flow, the response of the disturbance contains harmonic components besides the fundamental frequency of the ribbon vibration. The fundamental and harmonic disturbances can also enhance the energy of other frequency components around them. In the experiments, the regular disturbane was introduced in the outer region of the boundary layer. Under the given flow conditions, they can significantly influence the downstream coherent structures in the wall region by suppressing the bursts and increasing their period. The effect on the burst period depends on the disturbing frequency.
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References
Schubauer GB, Skramstal HK. Laminar-boundary-layer oscillations and transition on a flat plate. NACA Rept, 1948. 909
Klebanoff PS, Tidstron KD, Sargent LM. The three-dimensional nature of boundary-layer instability.J Fluid Mech, 1962, 12:1–34
Nishiok M, Iida S, Ichikawa Y. An experimental investigation of the plane Posuille flow.J Fluid Mech, 1975, 72:731–736
Kolzov VV, Ramazanov MP. Development of finite-amplitude disturbances in Poisuille flow.J Fluid Mech, 1984, 147:149–157
Yao SH, Shu W. Effect of organized artificial disturbances in outer region of wall turbulence on fluctuating characteristics of inner flow.Scientia Sinica (Series A), 1991, 34(9):1088–1097
Yao SH, Shu W. The effect of organized wave disturbances on coherent structure in wall turbulence.Acta Mech Sinica, 1991, 23(4):385–392 (in Chinese)
Zhang HQ, Shu W. Numerical simulation of vortex merging and vortex splitting in mixing layer.Scientia Sinica (Series A), 1990, 33(6):689–695
Li EB. Ph.D. thesis. Tianjin University, 1989 (in Chiese)
Landahl MT.J. Fluid Mech, 1990, 70:229
Offen GR, Kline SJ.J. Fluid Mech, 1974, 104:1
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The project supported by the National Natural Science Foundation of China
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Daqing, Z., Wei, S. The response of turbulent flow to the disturbance of a vibrating ribbon. Acta Mech Sinica 12, 193–199 (1996). https://doi.org/10.1007/BF02486806
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DOI: https://doi.org/10.1007/BF02486806