Experimental and Numerical Studies into the Cavitation Impact of the Hydrofoil Surface with Different Treatments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28645413%3A_____%2F22%3AN0000006" target="_blank" >RIV/28645413:_____/22:N0000006 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1134/S0040601522060064" target="_blank" >https://link.springer.com/article/10.1134/S0040601522060064</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S0040601522060064" target="_blank" >10.1134/S0040601522060064</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental and Numerical Studies into the Cavitation Impact of the Hydrofoil Surface with Different Treatments

Popis výsledku v původním jazyce

The experimental and numerical investigation of unsteady cavitating flow around a NACA2412 hydrofoil with chemically treated surfaces is described. The study was focused on the influence of the surface wettability on the intensity of cavitation processes. Two steel hydrofoils whose surface is treated using different methods are compared with a hydrofoil having a nontreated surface. The first of the treated hydrofoils has a 50–70-µm thick wear-resistant hydrophobic coating of tungsten carbide applied by ion-plasma deposition in a vacuum chamber. The second hydrofoil has a coating of a surfactant, octodecyamine, applied by deposition while keeping the hydrofoil in an aqueous solution. The hydrofoil with the span/chord ratio of 1.25 was tested in the cavitation tunnel. The incidence angle of the hydrofoil to the incoming flow was 8°. Numerical results were obtained using the ANSYS CFX software package with the Zwart cavitation model and the SAS-SST turbulence model. The monitored pressure fluctuations and the level of noise generated by cavitation-induced unsteady processes are estimated. It is demonstrated that additional surface treatment can help prevent unwanted phenomena in the flow path caused by cavitation. This technique does not require expensive modernization of the flow path in hydraulic machines. Numerical simulations and experiments carried out by the authors suggest that surface treatment can considerably affect the cavitation processes, and the results of studies demonstrate the need for further in-depth investigation of cavitation processes in hydraulic machines, including with the use of modern application software tools.

Název v anglickém jazyce

Experimental and Numerical Studies into the Cavitation Impact of the Hydrofoil Surface with Different Treatments

Popis výsledku anglicky

The experimental and numerical investigation of unsteady cavitating flow around a NACA2412 hydrofoil with chemically treated surfaces is described. The study was focused on the influence of the surface wettability on the intensity of cavitation processes. Two steel hydrofoils whose surface is treated using different methods are compared with a hydrofoil having a nontreated surface. The first of the treated hydrofoils has a 50–70-µm thick wear-resistant hydrophobic coating of tungsten carbide applied by ion-plasma deposition in a vacuum chamber. The second hydrofoil has a coating of a surfactant, octodecyamine, applied by deposition while keeping the hydrofoil in an aqueous solution. The hydrofoil with the span/chord ratio of 1.25 was tested in the cavitation tunnel. The incidence angle of the hydrofoil to the incoming flow was 8°. Numerical results were obtained using the ANSYS CFX software package with the Zwart cavitation model and the SAS-SST turbulence model. The monitored pressure fluctuations and the level of noise generated by cavitation-induced unsteady processes are estimated. It is demonstrated that additional surface treatment can help prevent unwanted phenomena in the flow path caused by cavitation. This technique does not require expensive modernization of the flow path in hydraulic machines. Numerical simulations and experiments carried out by the authors suggest that surface treatment can considerably affect the cavitation processes, and the results of studies demonstrate the need for further in-depth investigation of cavitation processes in hydraulic machines, including with the use of modern application software tools.

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

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Thermal Engineering

ISSN

0040-6015

e-ISSN

—

Svazek periodika

—

Číslo periodika v rámci svazku

69

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000809175000003

EID výsledku v databázi Scopus

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