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Numerični izračun školjčnega diagrama izkoristka francisove turbine : doktorska disertacijaJošt, DragicaV delu je predstavljena numerična analiza toka v francisovi turbini. Osredotočili smo se na napoved energijskih izgub v toku in napoved izkoristka turbine. Rezultate, dobljene z ločeno analizo toka v ... vsakem delu turbine, smo primerjali z rezultati ločenega izračuna toka v spirali in skupnega izračuna toka skozi preostalo turbino. Da bi ugotovili vpliv ločenega izračuna spirale in omejitve območja računanja v kaskadah na en periodični del, smo optimalno točko obratovanja skupaj izračunali tok v celi turbini od vstopa v spiralo do izstopa iz sesalne cevi. Nato smo izračunali tok v francisovi turbini v večjem številu obratovalnih točk, narisali školjčni diagram izkoristka in ga primerjali z izmerjenim. Enak izračun je bil narejen še za primer, ko nimamo izmerjenih pretokov, ki pripadajo dani geometriji in padcu. V tem primeru je pretok rezultat izračuna. V delu je predstavljen tudi vpliv gostote mreže in izbire turbolentnega modela na rezultate. Na koncu je prikazana še napoved kavitacije z numeričnim izračunom.Type of material - dissertationPublication and manufacture - Maribor : [D. Jošt], 2001Language - slovenianCOBISS.SI-ID - 6787094
Author
Jošt, Dragica
Other authors
Škerget, Leopold
Topics
francisova turbina |
numerična analiza toka |
metoda končnih volumnov |
turbolentni modeli |
napoved kavitacije |
francis turbine |
numerical flow analysis |
finite volume method |
turbolent models |
prediction of cavitation
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Library | Call number – location, accession no. ... | Copy status |
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Library of Technical Faculties, Maribor | pisarna A-003 (FERI) DD JOŠT D. NUMERIČNI | available - reading room |
University of Maribor Library | Skladišče II 53436 | available - reading room |
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Database name | Field | Year |
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Jošt, Dragica | 05388 |
Škerget, Leopold | 06428 |
Source: Personal bibliographies
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