Mathematical and experimental modelling of flow of air-saturated water through a convergent-divergent nozzle

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F16%3A86099616" target="_blank" >RIV/61989100:27230/16:86099616 - isvavai.cz</a>

Result on the web

<a href="http://www.epj-conferences.org/articles/epjconf/pdf/2016/09/epjconf_efm2016_02050.pdf" target="_blank" >http://www.epj-conferences.org/articles/epjconf/pdf/2016/09/epjconf_efm2016_02050.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/201611402050" target="_blank" >10.1051/epjconf/201611402050</a>

Result language

angličtina

Original language name

Mathematical and experimental modelling of flow of air-saturated water through a convergent-divergent nozzle

Original language description

In hydraulic elements an under-pressure is generated during fluid flow around sharp edges or changing the flow cross-section (e.g. for valves, switchgear, nozzles). In these locations air suction by leakages or release of air from the liquid during cavitation may occur. When flow modelling using classical mathematical model of cavitation at higher flow rates there is disagreement in the measured and calculated hydraulic variables before and behind hydraulic element. Therefore, it is necessary to use a mathematical model of cavitation applied to the three-phase flow (water, vapour, air). Nowadays it is necessary to look for mathematical approaches, which are suitable for quick engineering use in sufficiently precision numerical calculations. The article is devoted to theoretical investigation of multiphase mathematical model of cavitation and its verification using a laboratory experiment. At first case the k-ϵ RNG turbulent mathematical model with cavitation was chosen in accordance [9] and was applied on water flow with cavitation (water and vapour) in a convergent-divergent nozzle. In other cases a solution of water flow with cavitation and air saturation was investigated. Subsequently, the results of mathematical modelling and experimental investigation focused on monitoring of air content and its impact on the value of hydraulic parameters and the size of the cavitation area were verified. (C) 2016 Owned by the authors, published by EDP Sciences.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JR - Other machinery industry

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

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

Article name in the collection

EPJ Web of Conferences. Volume 114

ISBN

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ISSN

2101-6275

e-ISSN

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Number of pages

6

Pages from-to

1-6

Publisher name

EDP Sciences

Place of publication

Paříž

Event location

Praha

Event date

Nov 17, 2015

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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