Detail publikace

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

ŠTEFAN, D. URBAN, O. RUDOLF, P.

Originální název

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

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

swirling flow;vortices;CFD

Autoři

ŠTEFAN, D.; URBAN, O.; RUDOLF, P.

Vydáno

7. 4. 2025

Nakladatel

 Institute of Physics

ISSN

1755-1307

Periodikum

IOP Conference Series: Earth and Environmental Science

Ročník

1483

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

8

Strany počet

8

URL

https://iopscience.iop.org/article/10.1088/1755-1315/1483/1/012032

BibTex

@inproceedings{BUT197631,
  author="David {Štefan} and Ondřej {Urban} and Pavel {Rudolf}",
  title="Influence of swirl ratio on the onset of columnar vortices in the mixing part of swirl generator",
  booktitle="IOP Conference Series: Earth and Environmental Science",
  year="2025",
  journal="IOP Conference Series: Earth and Environmental Science",
  volume="1483",
  number="1",
  pages="1--8",
  publisher=" Institute of Physics",
  doi="10.1088/1755-1315/1483/1/012032",
  issn="1755-1307",
  url="https://iopscience.iop.org/article/10.1088/1755-1315/1483/1/012032"
}