20.500.12556/RUL-139630 Razvoj vetrovnika namenjenaga vizualizaciji aeroakustičnih virov hrupa Development of wind tunnel for beamforming ofaeroacoustic noise sources 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. 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. akustika aeroakustika beamforming akustična kamera laboratorijsko preizkuševališče zvok aerodinamični hrup acoustic aeroacoustics beamforming acoustic camera laboratory testing facility sound aerodynamic noise true false false [N. Cerkovnik] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2022-09-06 08:32:48 2022-09-06 08:32:53 2023-11-17 14:04:14 0000-00-00 00:00:00 2022 0 Ljubljana 0 XXI, 60 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 534.83:621.7(043.2) 244214 120858371 17468.pdf 17468.pdf 1 8DD5DBFF5935DF037E919159097438A0 2d8445895f1fcd26a579a0add96ca6dc34565f6732598002e2bbb9770ca5f1e3 afd1cffa-2dad-11ed-92af-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=160221 Fakulteta za strojništvo 0 0 0