Free surface lubrication of rotating cylinders by impacting Newtonian liquid jet

Bizjan, Benjamin (avtor), Širok, Brane (avtor), Blagojevič, Marko (avtor)

Free surface lubrication of rotating cylinders by Newtonian liquid jets was investigated at different impingement positions, jet- and circumferential velocities. The interaction between impinging round laminar jet and rotating surface was characterised by high-speed imaging. Compared to flat surface impingement, the liquid deposition mechanism is more complex and often accompanied by phenomena such as splashing, jet deflection and formation of radial surface stripes. Liquid splashing initially develops in direct deposition regime due to hydraulic jump-induced droplet shedding, transitioning to lamella instability splash at higher Reynolds numbers. The critical Reynolds number for splash onset is of same order of magnitude as for flat surface impingement and fairly constant at low relative jet impingement angles, but increases exponentially when angle approaches 90°. Liquid film width and thickness were both determined proportional to the square root of the jet/surface velocity ratio, with respective power law models in good agreement with measured values.

• Jezik: Angleški jezik
• Ključne besede: free surface lubrication, hydraulic jump, lamella instability, liquid jet impingement, rotating surface, splashing
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Nerecenzirani rokopis
• Leto izida: 2021
• Št. strani: Str. 439-449
• Številčenje: Vol. 33, iss. 8
• PID: 20.500.12556/RUL-133021
• UDK: 621.89:532(045)
• ISSN pri članku: 0954-0075
• DOI: 10.1002/ls.1565
• COBISS.SI-ID: 79474691
• Datum objave v RUL: 08.11.2021

Gradivo je del revije

• Naslov: Lubrication science
• Skrajšan naslov: Lubr. sci.
• Založnik: Leaf Coppin
• ISSN: 0954-0075
• COBISS.SI-ID: 2144539

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: prosta površina, omočenje, hidravlična nestabilnost, pljuskanje

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0401
• Naslov: Energetsko strojništvo