Detail publikace

Numerical and experimental analysis of self-induced instabilities of straight cavitating vortex

ŠTEFAN, D. HUDEC, M. POCHYLÝ, F. RUDOLF, P.

Anglický název

Numerical and experimental analysis of self-induced instabilities of straight cavitating vortex

Typ

Stať ve sborníku mimo WoS a Scopus

Jazyk

en

Originální abstrakt

Cavitating vortices are a well-documented and critical phenomenon in hydraulic machinery, known to induce significant pressure fluctuations, mechanical vibrations, and potential structural damage. These unsteady flow structures can emerge even in small-scale hydraulic machines, particularly under off-design operating conditions. This study investigates the development and behavior of a straight cavitating vortex that forms downstream of a centrifugal pump that operates in reverse mode (turbine mode). Since the pump geometry is originally optimized for pumping applications, the onset of vortex-induced cavitation occurs even at the best efficiency operating points. The research combines CFD simulations and experimental measurements to analyze the flow field and characterize the unsteady behavior of the cavitating vortex. Special attention is paid to self-induced instabilities that arise due to the complex interaction between the cavitating vortex core and the surrounding mean flow.

Klíčová slova anglicky

cavitation; straight vortex; swirling flow; CFD simulation; pump-as-turbine

Vydáno

2026-01-07

Nakladatel

University of West Bohemia

Místo

Plzeň, Czech Republic

ISBN

978-80-261-1254-9

Kniha

PROCEEDINGS OF COMPUTATIONAL MECHANICS 2025

Strany od–do

195–198

Počet stran

4

BIBTEX


@inproceedings{BUT200140,
  author="David {Štefan} and Martin {Hudec} and František {Pochylý} and Pavel {Rudolf}",
  title="Numerical and experimental analysis of self-induced instabilities of straight cavitating vortex",
  booktitle="PROCEEDINGS OF COMPUTATIONAL MECHANICS 2025",
  year="2026",
  pages="195--198",
  publisher="University of West Bohemia",
  address="Plzeň, Czech Republic",
  isbn="978-80-261-1254-9",
  url="https://dspace.zcu.cz/items/73687271-c9ee-4ba3-8786-c13e81367ddf"
}