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Title:Predvidevanje tokovno povzročenega zvoka in možnosti izboljšav
Authors:ID Košir, Peter (Author)
ID Belšak, Aleš (Mentor) More about this mentor... New window
Files:.pdf MAG_Kosir_Peter_2017.pdf (3,88 MB)
MD5: 0BD4532BA23883B81EBF0243684246C2
PID: 20.500.12556/dkum/37a5fa53-099c-4cab-9d3d-6a711a6abbd0
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
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, turbulenten tok, akustika, zvok, hrup, tok tekočine, računalniška dinamika tekočin, simulacija velikih vrtincev.
Place of publishing:Maribor
Publisher:[P. Košir]
Year of publishing:2017
PID:20.500.12556/DKUM-68222 New window
UDC:519.6:[534.612:532.5](043.2)
COBISS.SI-ID:21196054 New window
NUK URN:URN:SI:UM:DK:PQ8QKUPU
Publication date in DKUM:27.09.2017
Views:1558
Downloads:93
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:13.09.2017

Secondary language

Language:English
Title:Prediction of flow generated noise and optimization possibilities
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.
Keywords:numeric simulation, acoustic pressure, flow generated sound, turbulence, turbulent flow, acoustics, sound, noise, fluid flow, computer fluid dynamics, large eddy simulation.


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