Razvoj vetrovnika namenjenaga vizualizaciji aeroakustičnih virov hrupa

Cerkovnik, Nejc (author), Prezelj, Jurij (mentor)

Namen magistrskega dela je spoznavanje teorije aeroakustike, zasnova, izgradnja in testiranje laboratorijskega preizkuševališča. Slednje bo omogočilo nadaljnje raziskave na področju aeroakustike, psihoakustike in bazičnega razumevanja nastanka turbulence ter z njo povezanega hrupa. Pri snovanju aeroakustičnega pretočnega kanala je bilo potrebno posebej zasnovati testni del, pogonski del, izbrati primerno akustično izolacijo, zagotoviti natančnost meritev. Razviti in napisati je bilo potrebno programsko opremo za lociranje izvorov zvoka in izris akustične slike. Z uporabo analitičnega in numeričnega pristopa, so bili najprej zasnovani posamezni deli preizkuševališča. Pristopa sta bila med seboj primerjana in sta pokazala močno ujemanje. Po pridobitvi uporovne karakteristike je bil izbran tudi pogonski stroj preizkuševališča in akustična izolacija. Vzporedno je tekel razvoj algoritma lociranja virov aerodinamičnega hrupa s pomočjo beamforming-a. Po izgraditvi so bile v testnem delu izvedene meritve, ki so bile primerjane z akustično kamero. Rezultati kažejo na dobro ujemanje rezultatov, hkrati pa že postavljajo nova vprašanja, povezana z nastankom aerodinamičnega hrupa.

• Language: Slovenian
• Keywords: akustika, aeroakustika, beamforming, akustična kamera, laboratorijsko preizkuševališče, zvok, aerodinamični hrup
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [N. Cerkovnik]
• Year: 2022
• Number of pages: XXI, 60 str.
• PID: 20.500.12556/RUL-139630
• UDC: 534.83:621.7(043.2)
• COBISS.SI-ID: 120858371
• Publication date in RUL: 06.09.2022

CERKOVNIK, Nejc, 2022, Razvoj vetrovnika namenjenaga vizualizaciji aeroakustičnih virov hrupa [online]. Master’s thesis. Ljubljana : N. Cerkovnik. [Accessed 14 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=139630

Secondary language

• Language: English
• Title: Development of wind tunnel for beamforming ofaeroacoustic noise sources

Abstract

The purpose of presented master thesis is to learn about the theory of aeroacoustics, design, construction and testing of a laboratory test room. The latter will enable further research in the field of aeroacoustics, psychoacoustics and a basic understanding of the formation of turbulence and related noise. When designing the aeroacoustic flow channel, it was necessary to specially design the test part, the drive part, choose suitable acoustic insulation, and ensure the accuracy of the measurements. It was necessary to develop and write a software for locating sound sources and drawing an acoustic image. Using an analytical and numerical approach, individual parts of the test facility were first designed. The two approaches were compared with each other and showed strong agreement. After obtaining the resistance characteristic, the driving machine of the testing room and the acoustic insulation were also selected. In parallel, the development of the algorithm for locating sources of aerodynamic noise with the help of beamforming took place. After construction, measurements were taken in the test section, which were compared with an acoustic camera. The results show a good agreement between the results, but at the same time they raise new questions related to the generation of aerodynamic noise.

• Keywords: acoustic, aeroacoustics, beamforming, acoustic camera, laboratory testing facility, sound, aerodynamic noise