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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/GA23-06159S" target="_blank" >GA23-06159S: Vírové struktury: pokročilé metody identifikace a efektivní numerické simulace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

IOP Conference Series: Earth and Environmental Science

ISBN

—

ISSN

1755-1307

e-ISSN

1755-1315

Počet stran výsledku

8

Strana od-do

1-8

Název nakladatele

 Institute of Physics

Místo vydání

—

Místo konání akce

Timisoara

Datum konání akce

10. 10. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001524443000032