Numerical and Experimental Study of Oscillating Water Jets Injected in Submerged Conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F25%3A00601145" target="_blank" >RIV/68145535:_____/25:00601145 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/chapter/10.1007/978-3-031-72778-8_8" target="_blank" >https://link.springer.com/chapter/10.1007/978-3-031-72778-8_8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-031-72778-8_8" target="_blank" >10.1007/978-3-031-72778-8_8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical and Experimental Study of Oscillating Water Jets Injected in Submerged Conditions

Popis výsledku v původním jazyce

This paper studies the bulk effects generated during the underwater injection of self-excited oscillating water jets using a designed and manufactured in-house fluidic nozzle. As a first step to predict and analyze the process, transient tridimensional turbulent flows simulations were carried out, wherein two classic turbulent models (RANS and LES), with mesh refinement, were compared regarding their detailed description of the jets-induced vorticity and velocity fields. The submerged jet oscillation frequency was computed through CFD post-processing tools and it was found to be in a good match with the frequency value experimentally estimated by means of a pressure sensor at the desired input pressure level. A liquid-vapor phase change model allowed also the numerical computation of the cavitation field evolution during the jet injection, results of which correlated qualitatively well with the cavitation clouds footage recorded through the stroboscopic shadowgraph technique. Numerical and experimental results evidenced the important presence of cavitation and vorticity as constant effects of the studied process. Furthermore, submerged jet impingement to a soft plastic surface was performed to capture the added destructive potential of these effects and the final volumetric imprints were analyzed using digital microscope and computed tomography.

Název v anglickém jazyce

Numerical and Experimental Study of Oscillating Water Jets Injected in Submerged Conditions

Popis výsledku anglicky

This paper studies the bulk effects generated during the underwater injection of self-excited oscillating water jets using a designed and manufactured in-house fluidic nozzle. As a first step to predict and analyze the process, transient tridimensional turbulent flows simulations were carried out, wherein two classic turbulent models (RANS and LES), with mesh refinement, were compared regarding their detailed description of the jets-induced vorticity and velocity fields. The submerged jet oscillation frequency was computed through CFD post-processing tools and it was found to be in a good match with the frequency value experimentally estimated by means of a pressure sensor at the desired input pressure level. A liquid-vapor phase change model allowed also the numerical computation of the cavitation field evolution during the jet injection, results of which correlated qualitatively well with the cavitation clouds footage recorded through the stroboscopic shadowgraph technique. Numerical and experimental results evidenced the important presence of cavitation and vorticity as constant effects of the studied process. Furthermore, submerged jet impingement to a soft plastic surface was performed to capture the added destructive potential of these effects and the final volumetric imprints were analyzed using digital microscope and computed tomography.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/GA23-05235S" target="_blank" >GA23-05235S: Studium mechanismu vzniku stabilních vysokofrekvenčních kmitů generovaných v kapalině za vysokých tlaků</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Advances in Water Jetting II

ISBN

978-3-031-72777-1

ISSN

2195-4356

e-ISSN

2195-4364

Počet stran výsledku

17

Strana od-do

93-109

Název nakladatele

Springer Nature Schwitzerland AG

Místo vydání

Cham

Místo konání akce

Kutná Hora

Datum konání akce

17. 10. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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