Water surface topology of supercritical junction flow

Rak, Gašper (author), Hočevar, Marko (author), Steinman, Franci (author)

The complexity of flow conditions at junctions amplifies significantly with supercritical flow. It is a pronounced three-dimensional two-phased flow phenomenon, where standing waves with non-stationary water surface are formed. To analyse the hydrodynamic conditions at an asymmetric right-angled junction with incoming supercritical flows at Froude numbers between 2 and 12, an experimental approach was used. For a phenomenological determination of the relations between the integral parameters of incoming flows and the characteristics of standing waves at the junction area, water surface topographies for 168 scenarios at the junction were measured using non-intrusive measurement techniques. The new, phenomenologically derived equations allow for determination of location, height and extent of the main standing waves at the junction. Research results give important information on the processes and their magnitude for engineering applications.

• Language: English
• Keywords: junction, hydraulic experimentation, standing wave, supercritical flow, flow patterns
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2019
• Number of pages: Str. 163-170
• Numbering: Vol. 67, iss. 2
• PID: 20.500.12556/RUL-126365
• UDC: 621.22-821:626/627
• ISSN on article: 0042-790X
• DOI: 10.2478/johh-2018-0042
• COBISS.SI-ID: 8671841
• Publication date in RUL: 19.04.2021

Record is a part of a journal

• Title: Journal of Hydrology and Hydromechanics
• Shortened title: J. Hydrol. Hydromech.
• Publisher: Institute of Hydrology SAS, Institute of Hydrodynamics AS CR, v. v. i.
• ISSN: 0042-790X
• COBISS.SI-ID: 863585

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
• Licensing start date: 19.04.2021

Secondary language

• Language: Slovenian
• Keywords: gradbeništvo, vodarstvo, hidrotehnika, sotočje, hidravlične raziskave, stoječe valovanje, deroči tok, vzorci vodnega toka