Fluktuacije vodne gladine stoječega valovanja na sotočju dveh deročih tokov

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

Pri deročem toku se pogosto pojavi dvofazni tok, ki ga spremlja močno razgibana, nestacionarna vodna gladina. S klasičnimi merilnimi metodami določitev povprečnega poteka vodne gladine, posebno z večjo prostorsko ločljivostjo, praktično ni možna. Pri analizi sotočja dveh deročih tokov, kjer se oblikuje stoječe valovanje z veliko vertikalno dinamiko gladine, smo za meritve gladine uporabili lasersko skeniranje. Članek prikazuje, da je z obdelavo meritev te brezkontaktne merilne metode mogoče določiti tako srednji potek kot tudi fluktuacije vodne gladine. Rezultati širijo uporabo te merilne metode, ki prinaša pomembne informacije o lastnostih vodnega toka, na številna področja hidrotehnike. Prikazane so tokovne razmere na sotočju, kjer so bile iz izmerjene dinamike vodne gladine v merilnih prerezih za nabor 168 kombinacij dveh dotokov z visokimi vrednostmi Froudovih števil (2 < Fr

• Language: Slovenian
• Keywords: sotočje, deroči tok, dvofazni tok, fluktuacije vodne gladine, lasersko skeniranje
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2017
• Number of pages: Str. 107-120
• Numbering: 30, [št.] 53
• PID: 20.500.12556/RUL-126381
• UDC: 528.8.042:627.01
• ISSN on article: 0352-3551
• URN: URN:NBN:SI:DOC-C35LQXZ4
• COBISS.SI-ID: 8268641
• Publication date in RUL: 19.04.2021

Record is a part of a journal

• Title: Acta hydrotechnica
• Publisher: Fakulteta za gradbeništvo in geodezijo
• ISSN: 0352-3551
• COBISS.SI-ID: 3664386

Licences

• License: CC BY-NC-SA 4.0, Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Description: A Creative Commons license that bans commercial use and requires the user to release any modified works under this license.
• Licensing start date: 19.04.2021

Secondary language

• Language: English
• Title: Water surface fluctuations of standing waves at the supercritical confluence flow

Abstract

Two-phase flow often occurs in supercritical flows, accompanied by a highly dynamic, non-stationary water surface. Determining the average water surface profile, especially with higher spatial resolution, is practically impossible using conventional measurement methods. In the analysis of supercritical confluence flow, where standing waves with high vertical dynamic of water surface are formed, laser scanning was used to measure the free-water surface. Average profile as well as fluctuations of water surface can be determined with processing of (processed) measurements of this non-contact measurement method, as presented in this paper. The results contribute to wider use of this measurement method, which provides important information on water flow properties to many fields of hydro-engineering. Flow conditions are shown at confluences, where measurements of water surface dynamics in measured cross-section for 168 combinations of two flows with high values of Froude numbers (2 < Fr

• Keywords: confluence, supercritical flow, two-phase flow, fluctuations of water, laser scanning