Kritična gostota toplotnega toka na lasersko strukturirani površini pri mehurčkastem vrenju FC-72 : magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Faculty of Mechanical Engineering, Lj. (FSLJ)

Kritična gostota toplotnega toka na lasersko strukturirani površini pri mehurčkastem vrenju FC-72 : magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Križan, Peter, 1993-

V magistrski nalogi smo preučevali vpliv ključnih parametrov površin na proces mehurčkastega vrenja in razvoj kritične gostote toplotnega toka v bazenu dielektričnega fluida FC-72. Z bliskovnim ... nanosekundnim laserjem smo teksturirali površine trakcev iz nerjavnega jekla z namenom izdelave hrapavih površin z različnimi topografskimi značilnostmi. Te smo ovrednotili s pomočjo vrstičnega elektronskega mikroskopa (SEM), optičnega interferometra ter naprave za merjenje hitrosti omočenja površin. Lasersko teksturiranim trakcem smo na eksperimentalni progi za nasičeno mehurčkasto vrenje FC72 določali vrednosti kritične gostote toplotnega toka (CHF). Ugotovili smo, da so se vsem površinam izboljšale vrednosti CHF v primerjavi z neobdelano površino, najboljšim do 75%. S parametri hrapavosti smo popisali topografije površin, te pa primerjali z rezultati CHF. Spoznali smo, da zgolj parametri hrapavosti površin niso primerni za napovedovanje CHF. Nanj vpliva kombinacija teh parametrov skupaj s kompleksno topografijo površine in njeno omočljivostjo. Slednja je dober parameter za napovedovanje CHF pri isti topografiji, kar smo pokazali s staranjem vzorcev. Potrdili smo Hsujevo in Kandlikarjevo teorijo o vplivu aktivnih nukleacijskih mest na izboljšanje prenosa toplote z izdelavo ter popisom mikro jamic in zasutih mikro kanalov.

Type of material - master's thesis ; adult, serious

Publication and manufacture - Ljubljana : [P. Križan], 2018

Language - slovenian

COBISS.SI-ID - 16288539

Link(s):
https://repozitorij.uni-lj.si/Dokument.php?id=113195&lang=slv
Repository of the University of Ljubljana – RUL

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Author
Križan, Peter, 1993-

Other authors
Gregorčič, Peter, fizik | Golobič, Iztok

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Call number – location, accession no. ...	Copy status	Reservation
MAG 0000000561 IN: 70000561 MAG 561 IN: 70000561	available - reading room

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Year	Impact factor		Edition		Category		Classification
Year	JCR	SNIP	JCR	SNIP	JCR	SNIP	JCR	SNIP

Links to authors' personal bibliographies	Links to information on researchers in the SICRIS system
Križan, Peter, 1993-
Gregorčič, Peter, fizik	29224
Golobič, Iztok	05566

Source: Personal bibliographies and: SICRIS

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