| Autor: |
Pak, A. Yu., Lebiga, V. A., Zinovyev, V. N., Mironov, D. S., Fomin, Vasily, Shiplyuk, Alexander |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2020, Vol. 2351 Issue 1, p1-5, 5p |
| Abstrakt: |
Modeling the Couette flow in a semicircular channel and experiments using hot-wires installed directly into the flow allowed to obtain new results on the flow structure, velocity fluctuations, Taylor-Görtler vortices for both laminar and turbulent regimes [1-3]. Data were also obtained for the distributed roughness created by two ways. For the first one a self-adhesive tape of 0.16 mm thickness and 15 mm width has been used along the generatrix of the rotating cylinder. It was possible to glue several layers so to increase the thickness of the protrusions up to 3 times. The number of the protrusions was 2 or 4. The second type of irregularities has been created with grooves. For this aim a 3D printer has been used to create inner rotating cylinder with 4 equispaced grooves. The depth of the grooves was varied up to 3.5 mm. The measurements were carried out at different flow Reynolds numbers, changed both by the cylinder rotation speed and by pressure inside the channel. The obtained from hot-wire measurement results contain the average velocity profiles, the velocity fluctuation profiles across the semicircular channel, the flow disturbance spectra and characteristic frequencies for many flow regimes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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