magistrsko delo
Peter Košir (Author), Aleš Belšak (Mentor), Jurij Prezelj (Co-mentor), Boštjan Veber (Co-mentor)

Abstract

V okviru magistrskega dela je bila opravljena validacija numerične simulacije dinamičnega pojava tokovno povzročenega zvoka. Podana je bila ustrezna teoretična podlaga, sledi integralna obravnava elementa z značilnim pojavom žvižga v obliki eksperimenta, ki se je izvedel v Laboratoriju za energetske delovne stroje in tehnično akustiko na Fakulteti za strojništvo v Ljubljani. Osrednji del magistrskega dela zajema nastavitve in zagon numerične simulacije v programskem okolju Fluent. Sledi analiza vplivnih spremenljivk s pomočjo hitre Fourierjeve transformacije in slikovna obdelava animacije tokovnega polja z lastno programsko kodo. Slednje je izkazalo soodvisnost značilnih amplitud v frekvenčni domeni tokovnega polja in akustičnega pojava.

Keywords

numerična simulacija;akustični tlak;tokovno povzročen zvok;turbulenca;turbulentni tok;akustika;zvok;hrup;tok tekočine;računalniška dinamika tekočin;simulacija velikih vrtincev;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [P. Košir]
UDC: 519.6:[534.612:532.5](043.2)
COBISS: 21196054 Link will open in a new window
Views: 806
Downloads: 28
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Other data

Secondary language: English
Secondary title: Prediction of flow generated noise and optimization possibilities
Secondary abstract: Within presented thesis validation of numerical simulation regarding dynamic phenomenon of flow generated sound was performed. An appropriate theoretical basis was given, followed by the integral processing of an element with a typical phenomenon of whistle in the form of an experiment carried out in the Laboratory for pumps, compressors and technical acoustics at the Faculty of mechanical engineering in Ljubljana. The main part of the master's thesis covers the settings and start of numerical simulation in the Fluent programming environment. The analysis of influential variables is followed by the fast Fourier transformation of the sound field and the image processing of the animation of the flow field with our own program code is done. The latter showed the interdependence of the characteristic amplitudes in the frequency domain of the flow field and the acoustic phenomenon.
Secondary keywords: numerical simulation;acoustic pressure;flow generated sound;turbulence;turbulent flow;acoustics;sound;noise;fluid flow;computer fluid dynamics;large eddy simulation;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Embargo end date (OpenAIRE): 2020-09-26
Thesis comment: Univ. v Mariboru, Fak. za strojništvo, Računalniško inženirsko modeliranje
Pages: XIV, 91 str.
ID: 10863949