| Issue |
MATEC Web Conf.
Volume 383, 2023
22nd Conference on Power System Engineering
|
|
|---|---|---|
| Article Number | 00022 | |
| Number of page(s) | 13 | |
| DOI | https://doi.org/10.1051/matecconf/202338300022 | |
| Published online | 20 October 2023 | |
On Velocity Spectra within the Wake behind a Circular Cylinder
1 Power System Engineering Department, Faculty of Mechanical Engineering, University of West Bohemia in Pilsen, Univerzitní 22, 306 14 Pilsen, Czech Republic.
2 Department of Fluid Dynamics, Institute of Thermomechanics, Czech Academy of Sciences, Dolejškova 5, 182 00, Prague, Czech Republic.
* Corresponding author: uruba@fst.zcu.cz
The canonical case of a circular cylinder in crossflow is studied experimentally at Reynolds number 5k. The power-spectra of all velocity components in the turbulent wake are studied in detail. Special attention is paid to the appearance of peaks and spectra shape, i.e., to the slope of spectra parts. Signatures of presence forward energy cascade and inverse enstrophy cascade are detected. Three peaks corresponding to 1st, 2nd and 3rd harmonics of the Strouhal frequency are detected as well as local spectra slopes conforming to the Kolmogorov and Kraichnan theories.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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