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Frequency Response of Near-Wall Coherent Structures to Localized Periodic Blowing and Suction in Turbulent Boundary Layer |
| LIU Jian-Hua;JIANG Nan |
| Frequency Response of Near-Wall Coherent Structures to Localized Periodic Blowing and Suction in Turbulent Boundary Layer |
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| Cite this article: |
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LIU Jian-Hua, JIANG Nan 2008 Chin. Phys. Lett. 25 1738-1741 |
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Abstract We experimentally investigate the frequency response of near-wall coherent structures to localized periodic blowing and suction through a spanwise slot in a turbulent boundary layer by changing the frequency of periodic disturbance at similar velocities of free stream. The effects of blowing and suction disturbance on energy redistribution, turbulent intensity u'+rms over y+ and waveforms of phase-averaged velocity during sweeping process are respectively discussed under three frequencies of periodic blowing and suction in near-wall region of turbulent boundary layer, compared with those in a standard turbulent boundary layer. The most effective disturbance frequency is figured out in this system.
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| Keywords:
47.27.De
47.27.Nb
47.85.Id
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Received: 08 January 2008
Published: 29 April 2008
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