Faculty of Mechanical Engineering, Lj. (FSLJ)
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Numerična simulacija aspiracije zraka v vodo pri pospešenem gibanju bata v cilindru : magistrsko delo magistrskega študijskega programa II. stopnje StrojništvoTrček, Jaka, 1990-Raziskava se ukvarja z numerično simulacijo iztiskanja kapljevine iz cilindra z batom, kot npr. v procesni tehniki pri pripravi dvo- in več komponentnih lepil, smol in drugih snovi, kot tudi v ... tehnologiji visokotlačnega litja, kjer s pospešenim gibanjem bata iztiskamo talino. V omenjenih primerih je pomemben način gibanja bata, saj lahko zaradi prevelikega pospeševanja bata pride do pomešanja zraka s kapljevino - aeracije. Izbira ustreznega pospeška je ključna za kakovost končnih izdelkov. Numerične simulacije so bile izdelane v OpenFOAM 2.4.0 na podlagi 3D modela in dvofaznim tokom. Primerjane so bile 3 različne volumske zapolnjenosti cilindra pri enakomernem pospeševanju bata do štirih različnih hitrosti. Analizirana je bila ustvarjena stična površina, kjer je bil glavni poudarek na zmanjšanju aeracije kapljevine. Za kapljevino smo izbrali vodo. Ugotovili smo, da nižje hitrosti ne prinesejo želenega zmanjšanja aeracije zaradi počasnega gibanja bata, ki ustvari plitke valove. Najbolje se za naše obravnavane primere obnesejo srednje hitrosti 0,4 m/s in 0,6 m/s, kjer smo bili v vseh obravnavanih primerih zelo blizu idealnemu stanju brez aeracije kapljevine. Rezultati so bili primerjani z eksperimentom na visokotlačnem livarskem stroju in izkazalo se je, da so rezultati numeričnih simulacij primerljivi z realnim stanjem. Najvišje hitrosti bata iz literature so prav tako potrdile rezultate numeričnih simulacij.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [J. Trček], 2015Language - slovenianCOBISS.SI-ID - 14395675
Author
Trček, Jaka, 1990-
Other authors
Bombač, Andrej
Topics
magistrska dela |
numerična simulacija |
aspiracija |
pospešeno gibanje |
dvofazni tok |
stična površina |
stična površina |
master thesis |
numerical simulation |
aspiration |
accelerated movement |
two phase flow |
contact area |
contact area
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MAG 0000000224 IN: 70000224 MAG 224 IN: 70000224 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Trček, Jaka, 1990- | |
Bombač, Andrej | 05912 |
Source: Personal bibliographies
and: SICRIS
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