Experimental and Numerical Study on Vortical Structures and Their Dynamics in a Pump Sump

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F22%3A00559028" target="_blank" >RIV/61388998:_____/22:00559028 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23210/22:43966465 RIV/28645413:_____/22:N0000005

Výsledek na webu

<a href="https://mdpi-res.com/d_attachment/water/water-14-02039/article_deploy/water-14-02039-v2.pdf?version=1656560682" target="_blank" >https://mdpi-res.com/d_attachment/water/water-14-02039/article_deploy/water-14-02039-v2.pdf?version=1656560682</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/w14132039" target="_blank" >10.3390/w14132039</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental and Numerical Study on Vortical Structures and Their Dynamics in a Pump Sump

Popis výsledku v původním jazyce

Research on water flow in a pump inlet sump is presented. The main effort has been devoted to the study of the vortical structures' appearance and their behavior. The study was conducted in a dedicated model of the pump sump consisting of a rectangular tank 1272 x 542 x 550 mm(3) with a vertical bellmouth inlet 240 mm in diameter and a close-circuit water loop. Both Computational Fluid Dynamics (CFD) and experimental research methods have been applied. The advanced unsteady approach has been used for mathematical modeling to capture the flow-field dynamics. For experiments, the time-resolved Particle Image Velocimetry (PIV) method has been utilized. The mathematical modeling has been validated against the obtained experimental data, the main vortex core circulation is captured within 3%, while the overall flow topology is validated qualitatively. Three types of vortical structures have been detected: surface vortices, wall-attached vortices and bottom vortex. The most intense and stable is the bottom vortex, the surface and wall-attached vortices are found to be of random nature, both in their appearance and topology, they appear intermittently in time with various topologies. The dominant bottom vortex is relatively steady with weak, low-frequency dynamics, typical frequencies are up to 1 Hz. The origin of the vorticity of all large vortical structures is identified in the pump propeller rotation.

Název v anglickém jazyce

Experimental and Numerical Study on Vortical Structures and Their Dynamics in a Pump Sump

Popis výsledku anglicky

Research on water flow in a pump inlet sump is presented. The main effort has been devoted to the study of the vortical structures' appearance and their behavior. The study was conducted in a dedicated model of the pump sump consisting of a rectangular tank 1272 x 542 x 550 mm(3) with a vertical bellmouth inlet 240 mm in diameter and a close-circuit water loop. Both Computational Fluid Dynamics (CFD) and experimental research methods have been applied. The advanced unsteady approach has been used for mathematical modeling to capture the flow-field dynamics. For experiments, the time-resolved Particle Image Velocimetry (PIV) method has been utilized. The mathematical modeling has been validated against the obtained experimental data, the main vortex core circulation is captured within 3%, while the overall flow topology is validated qualitatively. Three types of vortical structures have been detected: surface vortices, wall-attached vortices and bottom vortex. The most intense and stable is the bottom vortex, the surface and wall-attached vortices are found to be of random nature, both in their appearance and topology, they appear intermittently in time with various topologies. The dominant bottom vortex is relatively steady with weak, low-frequency dynamics, typical frequencies are up to 1 Hz. The origin of the vorticity of all large vortical structures is identified in the pump propeller rotation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/EF17_049%2F0008408" target="_blank" >EF17_049/0008408: Hydrodynamický design čerpadel</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Water

ISSN

2073-4441

e-ISSN

2073-4441

Svazek periodika

14

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

27

Strana od-do

2039

Kód UT WoS článku

000824215700001

EID výsledku v databázi Scopus

2-s2.0-85133277281