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master's thesis
Termohidrauličke oscilacije dvofaznog toka
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:716788
Krtolačić, Josip
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

Cite this document

Krtolačić, J. (2023). Termohidrauličke oscilacije dvofaznog toka (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:716788

Krtolačić, Josip. "Termohidrauličke oscilacije dvofaznog toka." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:716788

Krtolačić, Josip. "Termohidrauličke oscilacije dvofaznog toka." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:716788

Krtolačić, J. (2023). 'Termohidrauličke oscilacije dvofaznog toka', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 18 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:716788

Krtolačić J. Termohidrauličke oscilacije dvofaznog toka [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2024 November 18] Available at: https://urn.nsk.hr/urn:nbn:hr:235:716788

J. Krtolačić, "Termohidrauličke oscilacije dvofaznog toka", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:716788

Metadata
TitleTermohidrauličke oscilacije dvofaznog toka
Title (english)Two-phases flow thermohydraulic oscillation
AuthorJosip Krtolačić
MentorDražen Lončar (mentor)
Committee memberNeven Duić (predsjednik povjerenstva)
Committee memberHrvoje Juretić (član povjerenstva)
Committee memberTomislav Pukšec (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-05-10, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Process Energy Engineering
Abstract
Oscilacije dvofaznog toka mogu izazvati pogonske probleme ili pucanje dijelova postrojenja, pa je predviđanje oscilacija neophodno za njihovo sprječavanje. Dan je pregled režima strujanja smjese kapljevina-para i opis termohidrauličkih oscilacija dvofaznog toka. Opisane su najviše istražene nestabilnosti dvofaznog toka koje se ujedno i najčešće pojavljuju. Klasifikacija je provedena slijedom opisa u dostupnoj literaturi. Režimi strujanja bit će bitni kod računanja pada tlaka i koeficijenta prijelaza topline u poglavlju - Numerička simulacija, u kojem je izvedena diskretizacija jednadžbi koje opisuju sustav metodom konačnih volumena i objašnjavaju se načini rješavanja problema numeričke matematike implementirani pri razvoju rješavača. Na kraju su izloženi rezultati četiriju simulacija, tri prikazuju različite tranzijentne pojave, dok četvrta pokazuje pojavu numeričkih nestabilnosti i divergencije.
Abstract (english)
Oscillations of two-phase flow can cause operational problems or even the rupture of plant and system components, so predicting oscillations is necessary for their prevention. A review of the flow regimes of the liquid-vapor mixture and a description of the thermohydraulic oscillations of two-phase flow are given. The most extensively studied and most frequently occurring instabilities of two-phase flow are described, and a classification is conducted based on the available literature. Flow regimes will be important in calculating pressure drop and heat transfer coefficient in the chapter - "Numerical Simulation", where the discretization of equations describing the system is performed using the finite volume method and ways of solving numerical mathematics problems implemented in the solver development are explained. Finally, the results of four simulations are presented, three of which show different transient phenomena, while the fourth shows the occurrence of numerical instabilities and divergence.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:716788
Study programmeTitle: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering, Mechatronics and Robotics, Autonomous Systems
Course: Process and Energy Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-05-12 17:26:49