Simulation and dynamics of secondary vortex structures induced by low discharge and high swirl in cylindrical pipe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU154923" target="_blank" >RIV/00216305:26210/24:PU154923 - isvavai.cz</a>

Výsledek na webu

<a href="https://naos-be.zcu.cz/server/api/core/bitstreams/071f4a22-1c5d-44ea-a834-5288f59b065b/content" target="_blank" >https://naos-be.zcu.cz/server/api/core/bitstreams/071f4a22-1c5d-44ea-a834-5288f59b065b/content</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Simulation and dynamics of secondary vortex structures induced by low discharge and high swirl in cylindrical pipe

Popis výsledku v původním jazyce

The fluid flow in pipe with low discharge and high swirl is convenient for formation of secondary flow structures. The onset of secondary vortex structures is driven by flow disturbances, i.e., pressure pulsations, local change of geometry, etc. Such situation might for example appears in the suction part of centrifugal pump operated at low discharge. Once these flow conditions appear in the suction of centrifugal pump, the flow is unstable and the pump performance is affected in terms of delivery head drop. The vortex structures forms flow blockage and since their spatial shape is not axi-symmetric there is also significant flow dynamics. This work presents the results of numerical calculation by means of CFD simulation of corresponding flow regime of centrifugal pump. The focus is on description of vortex structures dynamics which is important for further application of flow control devices to enhance pump operation.

Název v anglickém jazyce

Simulation and dynamics of secondary vortex structures induced by low discharge and high swirl in cylindrical pipe

Popis výsledku anglicky

The fluid flow in pipe with low discharge and high swirl is convenient for formation of secondary flow structures. The onset of secondary vortex structures is driven by flow disturbances, i.e., pressure pulsations, local change of geometry, etc. Such situation might for example appears in the suction part of centrifugal pump operated at low discharge. Once these flow conditions appear in the suction of centrifugal pump, the flow is unstable and the pump performance is affected in terms of delivery head drop. The vortex structures forms flow blockage and since their spatial shape is not axi-symmetric there is also significant flow dynamics. This work presents the results of numerical calculation by means of CFD simulation of corresponding flow regime of centrifugal pump. The focus is on description of vortex structures dynamics which is important for further application of flow control devices to enhance pump operation.

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

2024

Kód důvěrnosti údajů

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