Effect of ventilation to abrasive suspension jet under submerged condition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F21%3A00533231" target="_blank" >RIV/68145535:_____/21:00533231 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/chapter/10.1007/978-3-030-53491-2_3" target="_blank" >https://link.springer.com/chapter/10.1007/978-3-030-53491-2_3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-030-53491-2_3" target="_blank" >10.1007/978-3-030-53491-2_3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of ventilation to abrasive suspension jet under submerged condition

Popis výsledku v původním jazyce

High-speed water jet shows a peculiar processing property in cutting submerged objects, but its processing ability decreases quickly with the standoff distance under submerged conditions. For improving the performance of submerged cutting by abrasive suspension jet (ASJ) a ventilation nozzle system has been developed but the flow structure of ventilated jet is still unclear. Focused on the effect of ventilation, high-speed camera observations of air ventilated submerged water jets are conducted in this work and the structure of air ventilated ASJ is identified by similarity analysis. Experiments show that air-coated suspension jet may be generated by increasing the ventilation flowrate to a certain extent so that ventilation air spreads out of the sheath in the form of large cavity covering the jet. The air-coated jet pulsates periodically and the dominant frequency of air-layer pulsation decreases with increasing of the ventilation flowrate. The Strouhal number of jet pulsation is dependent upon an altered cavitation number. The performance of air-ventilated ASJ is then examined by cutting tests with specimens of aluminum alloy under different ventilation conditions. The result demonstrates that the kerf depth of air-ventilated ASJ in submerged condition reaches to almost the same level of ASJ cutting in air. The cutting ability of ASJ in submerged condition is effectively enhanced by air ventilation.

Název v anglickém jazyce

Effect of ventilation to abrasive suspension jet under submerged condition

Popis výsledku anglicky

High-speed water jet shows a peculiar processing property in cutting submerged objects, but its processing ability decreases quickly with the standoff distance under submerged conditions. For improving the performance of submerged cutting by abrasive suspension jet (ASJ) a ventilation nozzle system has been developed but the flow structure of ventilated jet is still unclear. Focused on the effect of ventilation, high-speed camera observations of air ventilated submerged water jets are conducted in this work and the structure of air ventilated ASJ is identified by similarity analysis. Experiments show that air-coated suspension jet may be generated by increasing the ventilation flowrate to a certain extent so that ventilation air spreads out of the sheath in the form of large cavity covering the jet. The air-coated jet pulsates periodically and the dominant frequency of air-layer pulsation decreases with increasing of the ventilation flowrate. The Strouhal number of jet pulsation is dependent upon an altered cavitation number. The performance of air-ventilated ASJ is then examined by cutting tests with specimens of aluminum alloy under different ventilation conditions. The result demonstrates that the kerf depth of air-ventilated ASJ in submerged condition reaches to almost the same level of ASJ cutting in air. The cutting ability of ASJ in submerged condition is effectively enhanced by air ventilation.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

Advances in Water Jetting

ISBN

978-3-030-53490-5

ISSN

2195-4356

e-ISSN

2195-4364

Počet stran výsledku

8

Strana od-do

28-35

Název nakladatele

Springer

Místo vydání

Cham

Místo konání akce

Čeladná

Datum konání akce

20. 11. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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