Journal
THERMOPHYSICS AND AEROMECHANICS
Volume 16, Issue 4, Pages 549-560Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0869864309040052
Keywords
decrease in turbulent friction; vertical elements; incompressible turbulent boundary layer; flat plate
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The possibility of decreasing the turbulent friction with the use of streamwise-aligned vertical large eddy breakup devices installed normal to the surface of a flat plate in an incompressible equilibrium turbulent boundary layer with a nominally gradientless flow past this plate is studied experimentally. The Reynolds number based on the boundary-layer momentum thickness is 1099 in the cross section where these vertical devices are mounted. It is shown that elements of this geometry are effective tools for modification of the turbulent boundary layer from the viewpoint of both the gain in friction drag and the suppression of turbulent fluctuations of velocity and, hence, can be considered as one of the most important factors of controlling the structure of the near-wall turbulence in the flow past a flat surface.
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