Abo Bibliothek: Guest
Tenth International Symposium on Turbulence and Shear Flow Phenomena
July, 7-9, 2017 , Swissotel Chicago, Chicago, Illinois, U.S.A.

DOI: 10.1615/TSFP10

Measurements of the two-dimensional energy spectra of wall-turbulence at high Reynolds number

pages 29-34
DOI: 10.1615/TSFP10.70
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ABSTRAKT

This paper describes a technique to experimentally measure the two-dimensional energy spectra of the streamwise velocity in wallturbulence. The technique is validated at low Reynolds numbers using Direct Numerical Simulation (DNS) data. It is found that a correction to the high wavenumber range of the energy spectra is required owing to physical limitations on minimum probe separation. The measurement technique and DNS-based correction scheme is employed in the University of Melbourne High Reynolds number (Re) wind-tunnel to measure the 2D spectra at high Re for the first time. The results are compared with attached eddy simulation models, showing that hierarchies of high-aspect ratio eddies are required to accurately capture the large-scale energy behaviour.

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