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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0200140" target="_blank" >RIV/00216305:26210/26:0200140 - isvavai.cz</a>

Výsledek na webu

<a href="https://dspace.zcu.cz/items/73687271-c9ee-4ba3-8786-c13e81367ddf" target="_blank" >https://dspace.zcu.cz/items/73687271-c9ee-4ba3-8786-c13e81367ddf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

O - Ostatní výsledky

CEP obor

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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

2026

Kód důvěrnosti údajů

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