Influence of Liquid Viscosity on the Origin and Propagation of Self-Excited Oscillations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F25%3A00601135" target="_blank" >RIV/68145535:_____/25:00601135 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/chapter/10.1007/978-3-031-72778-8_19" target="_blank" >https://link.springer.com/chapter/10.1007/978-3-031-72778-8_19</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-031-72778-8_19" target="_blank" >10.1007/978-3-031-72778-8_19</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Liquid Viscosity on the Origin and Propagation of Self-Excited Oscillations

Popis výsledku v původním jazyce

This paper deals with the study of the effect of fluid viscosity on the ability to generate and propagate self-excited oscillations in the inner space of a fluidic oscillator and at its outlet to the air environment. The generation and propagation of self-excited oscillations was monitored at several levels of inlet pressure values (5, 10, 15, 20 and 25 bar) and two flowing fluid consternationsnof the ethylene glycol (EG) (EG 100% and EG 90% with 10% of water). The fluidic oscillator was designed and manufactured with the possibility of connecting pressure sensors with a high sampling rate, allowing the measurement of the dynamic processes inside the oscillator. The experimental measuring circuit consisting of a middle-pressure pump, hose, and fluidic oscillator was equipped withnflow and pressure diagnostics. The output profile of the self-excited fluid jet into the air environment was observed using a high-speed optical shadowgraphy technique. The dynamic viscosity values were measured in the temperature interval (18–46 °C) for selected concentrations of EG. The results of the observation of oscillations occurring inside the fluidic oscillator and at its output are discussed in the paper.

Název v anglickém jazyce

Influence of Liquid Viscosity on the Origin and Propagation of Self-Excited Oscillations

Popis výsledku anglicky

This paper deals with the study of the effect of fluid viscosity on the ability to generate and propagate self-excited oscillations in the inner space of a fluidic oscillator and at its outlet to the air environment. The generation and propagation of self-excited oscillations was monitored at several levels of inlet pressure values (5, 10, 15, 20 and 25 bar) and two flowing fluid consternationsnof the ethylene glycol (EG) (EG 100% and EG 90% with 10% of water). The fluidic oscillator was designed and manufactured with the possibility of connecting pressure sensors with a high sampling rate, allowing the measurement of the dynamic processes inside the oscillator. The experimental measuring circuit consisting of a middle-pressure pump, hose, and fluidic oscillator was equipped withnflow and pressure diagnostics. The output profile of the self-excited fluid jet into the air environment was observed using a high-speed optical shadowgraphy technique. The dynamic viscosity values were measured in the temperature interval (18–46 °C) for selected concentrations of EG. The results of the observation of oscillations occurring inside the fluidic oscillator and at its output are discussed in the paper.

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

14

Strana od-do

258-271

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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