Abstract
The unsteady behavior of the large-scale vortical structures buried in a wall-bounded turbulent shear layer flow was extensively investigated using pressure-velocity joint measurements. The wall pressure fluctuations and flow field velocity fluctuations were measured simultaneously by using a microphone and an X-type hotwire, respectively. The spatially and temporally strong coupling between the convecting flow structures and the wall pressure fluctuations were meticulously investigated in terms of the continuous wavelet transform, cross-correlation and coherence of the wall pressure and flow field. The characteristics of the large-scale vortical structures, e.g., the shedding frequency, averaged convection velocity, convective motion, and structure pattern were revealed.
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Biography: LIU Ying-zheng (1972-), Male, Ph.D., Associate Professor
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Liu, Yz., Ke, F., Wang, Wz. et al. Pressure-Velocity Joint Measurements of a Wall-Bounded Turbulent Shear Flow. J Hydrodyn 18, 315–318 (2006). https://doi.org/10.1016/S1001-6058(06)60009-7
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DOI: https://doi.org/10.1016/S1001-6058(06)60009-7