Simulacije strujanja u maloj cevnoj turbini primenom dvojednačinskih modela turbulencije
Flow simulations in a small bulb turbine using two-equation turbulence models
dc.creator | Novković, Đorđe | |
dc.creator | Lečić, Milan | |
dc.creator | Burazer, Jela M. | |
dc.creator | Radenković, Darko | |
dc.date.accessioned | 2022-09-19T17:35:13Z | |
dc.date.available | 2022-09-19T17:35:13Z | |
dc.date.issued | 2014 | |
dc.identifier.issn | 1451-2092 | |
dc.identifier.uri | https://machinery.mas.bg.ac.rs/handle/123456789/2050 | |
dc.description.abstract | U radu su urađene numeričke simulacije strujanja u maloj cevnoj turbini primenom softvera Ansys CFX. Simulacije su izvedene primenom tri različita modela turbulencije koji su bazirani na Rejnoldsovom osrednjavanju Navije-Stoksovih jednačina: k-ε , k-ω i SST. Za svaki od navedenih modela razmotreno je sedam različitih radnih režima turbine. Da bi se smanjilo korišćenje računarskih resursa izvedene su stacionarne simulacije strujanja. Za sve slučajeve dobijena je dobra numerička stabilnost i konvergencija rešenja. Radne krive turbine formirane su za svaki od izabranih modela turbulencije na osnovu rezultata izvedenih simulacija u različitim radnim režimima. Za optimalni radni režim turbine, u proizvoljno izabranom poprečnom preseku difuzora izračunati su profili brzina za svaki model turbulencije, kao i raspodela statičkog pritiska po konturama loptatica radnog kola turbine. Izvršeno je upoređivanje dobijenih performansi turbine i data je analiza dobijenih profila brzine i raspodele statičkog pritiska za izabrane modele turbulencije. | sr |
dc.description.abstract | Numerical flow simulations in a small bulb turbine by the use of Ansys CFX software were performed in this paper. Simulations were performed for three different RANS-based models: k-ε , k-ω and SST. For each of these models, seven different operating regimes were considered. In order to reduce computational effort, steady state simulations were performed. In all cases, good numerical stability and convergence of solution were obtained. Based on the obtained results, performance curves for each of selected turbulence models in different operating regimes are formed. In turbine's optimal operating regime, velocity profiles in a selected cross section of the draft tube were calculated, as well as the static pressure distribution on runner blades. Comparison of obtained performance curves was performed. Analysis of the velocity profiles and distribution of static pressure are given for each of the selected turbulence model. | en |
dc.publisher | Univerzitet u Beogradu - Mašinski fakultet, Beograd | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/35046/RS// | |
dc.rights | openAccess | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | FME Transactions | |
dc.subject | turbulence modeling | en |
dc.subject | small turbine | en |
dc.subject | performance curves | en |
dc.subject | CFD | en |
dc.title | Simulacije strujanja u maloj cevnoj turbini primenom dvojednačinskih modela turbulencije | sr |
dc.title | Flow simulations in a small bulb turbine using two-equation turbulence models | en |
dc.type | article | |
dc.rights.license | BY | |
dc.citation.epage | 127 | |
dc.citation.issue | 2 | |
dc.citation.other | 42(2): 118-127 | |
dc.citation.rank | M24 | |
dc.citation.spage | 118 | |
dc.citation.volume | 42 | |
dc.identifier.doi | 10.5937/fmet1402118N | |
dc.identifier.fulltext | http://machinery.mas.bg.ac.rs/bitstream/id/836/2047.pdf | |
dc.identifier.scopus | 2-s2.0-84898901781 | |
dc.type.version | publishedVersion |