Publication result detail

Study of dynamic vortex structures of an incompressible liquid

POCHYLÝ, F.; ŠTEFAN, D.; FIALOVÁ, S.

Original Title

Study of dynamic vortex structures of an incompressible liquid

English Title

Study of dynamic vortex structures of an incompressible liquid

Type

Paper in proceedings (conference paper)

Original Abstract

The study of non-stationary vortex structures arising at the inlet of centrifugal pumps and at the outlet of turbines of the Kaplan and Francis type is the subject of the presented paper. Specific attention will be paid to spatial vortices, characterized by curvature and twist. Spiral vortices will also be monitored as sources of spatial vortex motion. Their core will be expressed by a mathematical model in curvilinear coordinates. Helicity, which indicates the degree of vorticity, will also be determined by computational simulation of turbulent motion. The swirling motion will be induced by a specially designed diffuser-shaped vortex generator, simulating the inlet to the turbine draft tube. A significant result of the study of vortex structures will be the dependence of the twist of the streamline in relation to the Hessian matrix, expressed as a function of the pressure function. This dependence will be significant for the optimization of the hydraulic machines.

English abstract

The study of non-stationary vortex structures arising at the inlet of centrifugal pumps and at the outlet of turbines of the Kaplan and Francis type is the subject of the presented paper. Specific attention will be paid to spatial vortices, characterized by curvature and twist. Spiral vortices will also be monitored as sources of spatial vortex motion. Their core will be expressed by a mathematical model in curvilinear coordinates. Helicity, which indicates the degree of vorticity, will also be determined by computational simulation of turbulent motion. The swirling motion will be induced by a specially designed diffuser-shaped vortex generator, simulating the inlet to the turbine draft tube. A significant result of the study of vortex structures will be the dependence of the twist of the streamline in relation to the Hessian matrix, expressed as a function of the pressure function. This dependence will be significant for the optimization of the hydraulic machines.

Keywords

vortex structures; curvature; twist; helicity; vorticity

Key words in English

vortex structures; curvature; twist; helicity; vorticity

Authors

POCHYLÝ, F.; ŠTEFAN, D.; FIALOVÁ, S.

RIV year

2025

Released

04.07.2024

Publisher

EPJ Web of Conferences

Book

Experimental Fluid Mechanics 2022

ISBN

2100-014X

Periodical

EPJ Web of Conferences

Volume

299

Number

1

State

French Republic

Pages from

1

Pages to

6

Pages count

6

URL

https://www.epj-conferences.org/articles/epjconf/abs/2024/09/epjconf_efm2024_01031/epjconf_efm2024_01031.html

Full text in the Digital Library

http://hdl.handle.net/11012/249956

BibTex

@inproceedings{BUT189102,
  author="František {Pochylý} and David {Štefan} and Simona {Fialová}",
  title="Study of dynamic vortex structures of an incompressible liquid",
  booktitle="Experimental Fluid Mechanics 2022",
  year="2024",
  journal="EPJ Web of Conferences",
  volume="299",
  number="1",
  pages="1--6",
  publisher="EPJ Web of Conferences",
  doi="10.1051/epjconf/202429901031",
  issn="2100-014X",
  url="https://www.epj-conferences.org/articles/epjconf/abs/2024/09/epjconf_efm2024_01031/epjconf_efm2024_01031.html"
}

Documents

epjconf_efm2024_01031