Influence of swirl ratio on the onset of columnar vortices in the mixing part of swirl generator

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0197631" target="_blank" >RIV/00216305:26210/26:0197631 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1755-1315/1483/1/012032" target="_blank" >https://iopscience.iop.org/article/10.1088/1755-1315/1483/1/012032</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1755-1315/1483/1/012032" target="_blank" >10.1088/1755-1315/1483/1/012032</a>

Result language
angličtina
Original language name
Influence of swirl ratio on the onset of columnar vortices in the mixing part of swirl generator
Original language description
The study presents analysis of conditions for the onset of columnar vortices in the mixing part of swirl generator. The simplified geometry, used for this analysis, is based on the physical model of the bladeless swirl generator developed by the research group from Brno University of Technology. This swirl generator was previously used for several studies of the spiral vortex structures generated in the diffuser part. The main aim for the current study is the mixing mechanism, which is realized in the part where the axial inflow meets the tangential one. Since there are no guide vanes or other driving geometry features, the mixing mechanism is realized randomly, is strongly time-dependent and its behavior is linked to the swirl ratio between the axial and tangential inflows. From previous studies, the appearance of vortical structures with columnar-like shape was identified. For the better understanding of this mixing mechanism, which may influence the flow downstream and consequently the generated vortex, the several swirl ratios of axial and tangential inflow were studied. The dynamic of vortices are extracted using A-f analysis and proper orthogonal decomposition. The results are based on the CFD simulation employing a hybrid RANS+LES turbulence models.
Czech name
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Czech description
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Project
<a href="/en/project/GA23-06159S" target="_blank" >GA23-06159S: Vortical structures: advanced identification and efficient numerical simulation</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
IOP Conference Series: Earth and Environmental Science
ISBN
—
ISSN
1755-1307
e-ISSN
1755-1315
Number of pages
8
Pages from-to
1-8
Publisher name
 Institute of Physics
Place of publication
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Event location
Timisoara
Event date
Oct 10, 2023
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001524443000032

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