Effect of Cylinder Roughness on Strouhal Number

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F22%3A43964067" target="_blank" >RIV/49777513:23210/22:43964067 - isvavai.cz</a>
Result on the web
<a href="http://www2.it.cas.cz/fm/im/im/proceeding/2022/27" target="_blank" >http://www2.it.cas.cz/fm/im/im/proceeding/2022/27</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.14311/TPFM.2022.027" target="_blank" >10.14311/TPFM.2022.027</a>

Result language
angličtina
Original language name
Effect of Cylinder Roughness on Strouhal Number
Original language description
The main goal of this paper is to establish a better understanding of the relationship between a Strouhal number and surface roughness. Hot-wire anemometry was used to evaluations the characteristics of turbulent flow behind circular cylinders with different relative roughness 0% (smooth surface) 0.83%, 1.67%, 3.33%, and 6.67%. At the experimental investigation, the Reynolds number based on the cylinder diameter was 5 × 103 < Red < 2 × 104. The obtained data showed that the Strouhal number decreased with increasing roughness. While, the dissipation rate decreases, and the value of the Kolmogorov and Taylor microscales increases. Also, spectral analysis of streamwise velocity fluctuations allowed us to estimate the location of the vortex-shedding frequency which at growing roughness tends to reduce.
Czech name
—
Czech description
—

Project
<a href="/en/project/EF16_026%2F0008389" target="_blank" >EF16_026/0008389: Research Cooperation for Higher Efficiency and Reliability of Blade Machines</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)