Numerična simulacija toka zraka skozi gonilnik sesalnika za prah

Kocijančič, Martin (author), Šarler, Božidar (mentor)

Radialni gonilnik je sestavni del sesalnika za prah. Njegova vloga je ustvarjanje podtlaka s čim manj energijskimi izgubami. V tem delu analiziramo gonilnik na podlagi računalniške dinamike tekočin, ki je alternativa dragim in dolgotrajnim meritvam. V programskem okolju OpenFOAM smo izdelali računalniški model gonilnika ter izvedli numerično analizo tokovnih razmer. Cilj je poiskati ustrezni fizikalni in numerični model, ki bo dal primerljive rezultate z uveljavljenim programom ANSYS Fluent. Najbolj ujemajoče rezultate smo dobili s turbulentnim modelom k-omega SST in numeričnimi shemami drugega reda natančnosti. Ugotovili smo, kakšen vpliv na rezultate ima upoštevanje oz. neupoštevanje stisljivosti zraka. Izdelali smo karakteristične krivulje gonilnika, iz katerih je razvidno, pri katerem volumskem pretoku ima gonilnik največji izkoristek. V nadaljevanju bomo analizirali pretok zraka skozi celotno motorno enoto sesalnika.

• Language: Slovenian
• Keywords: računalniška dinamika tekočin, OpenFOAM, gonilniki, sesalniki za prah, izkoristek
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Kocijančič]
• Year: 2019
• Number of pages: XIV, 41 f.
• PID: 20.500.12556/RUL-110971
• UDC: 532.5:004.942:648.525(043.2)
• COBISS.SI-ID: 16896539
• Publication date in RUL: 21.09.2019

KOCIJANČIČ, Martin, 2019, Numerična simulacija toka zraka skozi gonilnik sesalnika za prah [online]. Bachelor’s thesis. Ljubljana : M. Kocijančič. [Accessed 5 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=110971

Secondary language

• Language: English
• Title: Numerical simulation of air flow through vacuum cleaner impeller

Abstract

Radial impeller is a part of the vacuum cleaner. Its role is to create vacuum with as little energy loss as possible. In this work we analyse the impeller using computational fluid dynamics which is an alternative to expensive and time-consuming measurements. In the OpenFOAM software environment, we created a computational model and performed a numerical analysis of flow conditions. The goal is to find the right physical and numerical model that will produce comparable results to the established ANSYS Fluent software. Best match is achieved by using k-omega SST turbulence model and second-order accurate numerical schemes. We have found out the impact of the compressibility and incompressibility of the air on the results. We generated the performance curves of the impeller from which it is clear at which volume flow rate the impeller has the highest efficiency. In the future, we will analyse the air flow through the entire motor unit of a vacuum cleaner.

• Keywords: computational fluid dynamics, OpenFOAM, impellers, vacuum cleaners, efficiency