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POCHYLÝ, F. ŠTEFAN, D. FIALOVÁ, S.
Original Title
Study of dynamic vortex structures of an incompressible liquid
Type
conference paper
Language
English
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.
Keywords
vortex structures; curvature; twist; helicity; vorticity
Authors
POCHYLÝ, F.; ŠTEFAN, D.; FIALOVÁ, S.
Released
4. 7. 2024
Publisher
EPJ Web of Conferences
ISBN
2100-014X
Periodical
Year of study
299
Number
1
State
French Republic
Pages from
Pages to
6
Pages count
URL
https://www.epj-conferences.org/articles/epjconf/abs/2024/09/epjconf_efm2024_01031/epjconf_efm2024_01031.html
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" }