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Journal article

Diagnostics of BubbleMode Vortex Breakdown in Swirling Flow in a Large-Aspect-Ratio Cylinder

By Kulikov, D. V.1; Mikkelsen, Robert Flemming2,3; Naumov, Igor2,3; Okulov, Valery2,3

From

Russian Academy of Sciences1

Department of Wind Energy, Technical University of Denmark2

Fluid Mechanics, Department of Wind Energy, Technical University of Denmark3

We report for the first time on the possible formation of regions with counterflow (bubble-mode vortex breakdown or explosion) at the center of strongly swirling flow generated by a rotating endwall in a large-aspect-ratio cylindrical cavity filled with a liquid medium. Previously, the possibility of bubble-mode breakdown was studied in detail for cylindrical cavities of moderate aspect ratio (length to radius ratios up to H/R ∼ 3.5), while flows in large-aspect-ratio cylinders were only associated with regimes of self-organized helical vortex multiplets.

In the present study, a regime with nonstationary bubble-mode vortex breakdown has been observed in a cylindrical cavity with H/R = 4.5.

Language: English
Publisher: Pleiades Publishing
Year: 2014
Pages: 181-184
ISSN: 10906533 , 10637850 and 03200116
Types: Journal article
DOI: 10.1134/S1063785014020230
ORCIDs: Mikkelsen, Robert Flemming and Okulov, Valery
Keywords

Classical Continuum Physics Physics Physics and Astronomy

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