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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN 印刷: 2152-5102
ISSN オンライン: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v30.i6.70
7 pages

Correlation Characteristics of a Wall Pressure Fluctuation Field in a Turbulent Boundary Layer Induced by a Longitudinal Flow along a Flexible Extended Cylinder

V. A. Voskoboinick
Institute of Hydromechanics of National Academy of Sciences of Ukraine 8/4, Zhelyabov St., Kyiv, 03057, Ukraine
A. P. Makarenkov
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv

要約

Results of an experimental research on correlation characteristics of the wall pressure fluctuations of a turbulent boundary layer, formed by a longitudinal flow along a flexible extended cylinder, are presented. It has been found out that the intensity of the wall pressure fluctuations of the turbulent boundary layer is higher at the flexible cylinder than at a flat plate or at a rigid cylinder. The pressure-inducing vortical structures are transported downstream along the longitudinal axis of the cylinder. The degeneration rate of maximum magnitudes of the space-time correlation factor for the flexible cylinder is higher than for the plate but lower than for the rigid cylinder. Large-scale vortical systems have a greater "lifetime" and are transported at larger distances than small-scale high-frequency vortical structures.


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