Darjan Podbevšek (Avtor), Martin Petkovšek (Avtor), Claus-Dieter Ohl (Avtor), Matevž Dular (Avtor)

Povzetek

The paper shows visualization of cavitation inside a micro-Venturi channel. While the initial aim of the study was to establish supercavitating conditions inside a micro-Venturi, yet we found that this regime is suppressed due to the formation of a Kelvin-Helmholtz instability, which triggers a semi periodical attached cavity collapse. In depth observations using high speed imaging with visible light and X-rays revealed that this is, besides the re-entrant jet and the shock wave, a third mechanism leading to the shedding of cloud cavitation. In addition, a simple model was proposed which explains the formation of the Kelvin-Helmholtz instability in cavitating micro-Venturi and also offers explanation on why this is the dominant mechanism of cavitation cloud shedding at small scales.

Ključne besede

cavitation;Kelvin-Helmholtz instability;Venturi microchannel;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 532.528(045)
COBISS: 66420227 Povezava se bo odprla v novem oknu
ISSN: 0301-9322
Št. ogledov: 305
Št. prenosov: 129
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: kavitacija;Kelvin-Helmholt nestabilnost;Venturijev mikrokanal;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-7
Zvezek: ǂVol. ǂ142
Čas izdaje: Sep. 2021
DOI: 10.1016/j.ijmultiphaseflow.2021.103700
ID: 13002072