Submerged pulsating water jet erosion of ductile material

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F24%3A00580779" target="_blank" >RIV/68081723:_____/24:00580779 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/44555601:13420/24:43898910 RIV/61989100:27230/24:10254187

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0043164824000085?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0043164824000085?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.wear.2024.205243" target="_blank" >10.1016/j.wear.2024.205243</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Submerged pulsating water jet erosion of ductile material

Popis výsledku v původním jazyce

This article deals with the manifestations of erosion of statically acting concentrated multiple droplet im-pingements on materials over different lengths of time in order to assess the erosion evolution when the materials nare submerged, as compared with the action of droplets on the materials under atmospheric conditions. The nstudy aims to determine the extent of the erosive effects of droplets in underwater conditions. Experiments were nconducted in a plastic pool in which the water level was varied from h = 80 to h = 120 mm to identify the effect nof hydrostatic pressure at p120 = 0.1025 MPa and p80 = 0.1021 MPa. The results were compared with that of a ncontrol group of samples obtained under atmospheric air conditions. To observe the erosive damage evolution, n15 (n = 5) sites on the ductile materials EN AW-Al 99.5 and CW004A were exposed to high-intensity droplet nimpingement at defined exposure times. The exposure time varied from 0.125 s to 1.875 s, with increments of n0.125 s. As a droplet generator, an ultrasonic pulsating water jet with a frequency f = 20 kHz, a pressure p = 30 nMPa and a nozzle diameter d = 0.4 mm was used to achieve the theoretical subsonic speed of the droplets. The nresults exceeded the assumptions regarding the possible attenuation of water pulses. It was found that under the ntheoretical speed of the jet vw = 225 m/s, the submerged condition causes attenuation in its erosive action. The nincident area in the case of submerged treatment was more symmetrical. The erosion shift in term of prolonging nincubation erosion stage was found to be a result of the increasing hydrostatic pressure. The results suggest that nthis method can also be used under submerged conditions for treatment or material drilling.

Název v anglickém jazyce

Submerged pulsating water jet erosion of ductile material

Popis výsledku anglicky

This article deals with the manifestations of erosion of statically acting concentrated multiple droplet im-pingements on materials over different lengths of time in order to assess the erosion evolution when the materials nare submerged, as compared with the action of droplets on the materials under atmospheric conditions. The nstudy aims to determine the extent of the erosive effects of droplets in underwater conditions. Experiments were nconducted in a plastic pool in which the water level was varied from h = 80 to h = 120 mm to identify the effect nof hydrostatic pressure at p120 = 0.1025 MPa and p80 = 0.1021 MPa. The results were compared with that of a ncontrol group of samples obtained under atmospheric air conditions. To observe the erosive damage evolution, n15 (n = 5) sites on the ductile materials EN AW-Al 99.5 and CW004A were exposed to high-intensity droplet nimpingement at defined exposure times. The exposure time varied from 0.125 s to 1.875 s, with increments of n0.125 s. As a droplet generator, an ultrasonic pulsating water jet with a frequency f = 20 kHz, a pressure p = 30 nMPa and a nozzle diameter d = 0.4 mm was used to achieve the theoretical subsonic speed of the droplets. The nresults exceeded the assumptions regarding the possible attenuation of water pulses. It was found that under the ntheoretical speed of the jet vw = 225 m/s, the submerged condition causes attenuation in its erosive action. The nincident area in the case of submerged treatment was more symmetrical. The erosion shift in term of prolonging nincubation erosion stage was found to be a result of the increasing hydrostatic pressure. The results suggest that nthis method can also be used under submerged conditions for treatment or material drilling.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Wear

ISSN

0043-1648

e-ISSN

1873-2577

Svazek periodika

538-539

Číslo periodika v rámci svazku

Feb

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

16

Strana od-do

205243

Kód UT WoS článku

001153289100001

EID výsledku v databázi Scopus

2-s2.0-85181908828