Modeliranje in optimizacija prostega natoka taline na centrifugo za proizvodnjo kamene volne

Blagojevič, Marko (author), Bizjan, Benjamin (mentor)

V delu je bila opravljena vizualizacija vpliva hitrosti kolesne površine in hitrosti curka na obliko in škropljenje kapljevine v okolici natočnega mesta z uporabo hitre kamere. Izvedena je bila vizualizacija prostega toka modelne kapljevine iz kanala s prerezom v obliki črke V pod kotom 90 °. Izdelan je bil numerični model prostega natoka modelne kapljevine iz V-kanala, U-kanala in pravokotnega kanala. Prosti natok kapljevine smo simulirali z laminarnim modelom in uporabo VOF modela za obravnavanje proste površine. Z rezultati numeričnih simulacij in vizualizacije s hitro kamere je bila predlagana optimalna oblika prostega kanala za natok taline na kolo centrifuge. Kriterij za izbiro optimalne oblike kanala je bilo razmerje med širino in debelino curka. Najboljše rezultate smo dobili za V-kanal, kjer je znašalo razmerje med širino in debelino curka 2,17. Na podlagi rezultatov numeričnih simulacij smo potrdili, da je širino in debelino curka pri natoku na kolesno centrifugo možno razložiti s teorijo mehanizma kapilarnih valov.

• Language: Slovenian
• Keywords: kamena volna, numerični model, prosti natok kapljevine, iztočni kanal, vizualizacija toka, kolesna centrifuga
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Blagojevič]
• Year: 2021
• Number of pages: XXII, 63 str.
• PID: 20.500.12556/RUL-129123
• UDC: 532:677.52:519.6(043.2)
• COBISS.SI-ID: 78025475
• Publication date in RUL: 27.08.2021

Secondary language

• Language: English
• Title: Modeling and optimization of free overfall melt flow on a stone wool spinner

Abstract

In the thesis, a visualization of the influence of wheel surface speed and jet speed on the shape and spraying of liquid in the jet impact point was performed by means of high-speed imaging. Visualization of the free flow of model liquid from the channel with a V - shaped cross section at a 90 ° angle was performed. A numerical model of free flow of model liquid from V-channel, U-channel and rectangular channel was developed. Free flow of liquid was simulated with a laminar model and the use of VOF model to address the free surface. Based on the results of numerical simulations and visualization with a speed camera, the optimal shape of free channel for the flow of melt on a wheel spinner was proposed. The criteria for selecting the optimal channel shape was the ratio of jet width to thickness. The best results were obtained with the V-channel, where the ratio of jet width to thickness was 2,17. Based on analysis of numerical simulation results, we confirmed that the width and thickness of the jet on the wheel spinner can be explained by the theory of the capillary wave mechanism.

• Keywords: mineral wool, numerical model, free surface flow, outflow channel, flow visualization, wheel spinner