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Vrednotenje kavitacijskih in tokovnih razmer v postaji z majhno režo : diplomska naloga visokošolskega študijskega programa I. stopnje StrojništvoPoljanšek, ŽigaV hidrodinamiki se inercialna kavitacija pojavlja, ko se na majhni razdalji izrazito spremeni hitrost tekočine in privede do znižanja lokalnega tlaka. Kavitacija je v večini nezaželen pojav, katere ... učinki so erozija, prekomeren hrup, vibracije in motnje režima toka. Obravnavali smo pojav kavitacije v objektu z majhno režo, ki smo ga izdelali za potrebe večjega tujega podjetja. Objekt nam je omogočal, da s hitro kamero posnamemo nastalo obliko kavitacije. Dobljene posnetke smo nato preučili in računalniško obdelali. Rezultate smo predstavili v obliki konturnih diagramov za srednjo vrednost sivine in standardni raztros sivine ter v obliki frekvenčnih diagramov. Analizirali smo hitrosti udarnih valov in iskali ponovljive vzorce v dinamiki tekočine, ki kavitira. Ugotovili smo, da na razširjenost kavitacije vpliva predvsem tlak na izstopu iz šobe, ki vpliva tudi na frekvenco trganja kavitacijskih struktur, kjer padec tlaka povzroči znižanje frekvence. Z analizo udarnega vala smo ugotovili, da dosega hitrosti tudi do 400 m/s, njegovo obnašanje pa je precej kaotično, nepredvidljivo in brez kakršnihkoli vzorcev. Pri analizi "kavitacijske rože" je moč opaziti prisotnost tlačnega vala na robu kavitacije in njegov vpliv na porušitev kavitacijskih struktur.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [Ž. Poljanšek], 2018Language - slovenianCOBISS.SI-ID - 16472603
Author
Poljanšek, Žiga
Other authors
Dular, Matevž
Topics
diplomske naloge |
kavitacija |
intenziteta |
frekvenca trganja |
udarni val |
kavitacijska roža |
kolaps |
cavitation |
intensity |
rapture frequency |
shock wave |
cavitation flower |
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Library | Call number – location, accession no. ... | Copy status |
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Faculty of Mechanical Engineering, Lj. | VS 536 IN: 60000536 |
available - reading room |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Poljanšek, Žiga | ![]() |
Dular, Matevž | 23471 |
Source: Personal bibliographies
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