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Liu, W.; Podowski, M. Z.*
Nihon Kikai Gakkai Netsu Kogaku Konfarensu 2015 Koen Rombunshu (CD-ROM), 2 Pages, 2015/10
This paper gives prediction to the transient heat transfer at Departure of Nucleate Boiling (DNB) point for subcooled flow boiling. The prediction is carried out by solving the heat conduction equations in cylindrical coordinates with convective boundary condition, which changes with the change of the heat transfer mode on the heated surface. DNB is assumed to happen at the complete dryout of liquid sublayer trapped between the heated wall and an elongated vapor clot, during the passing time of the vapor clot. Important parameters including initial thickness of the liquid sublayer, vapor clot length, vapor clot velocity and void fraction etc., are calculated from the Liu - Nariai model. The initial heater surface temperature is derived from the Jens-Lottes correlation. The transient changes of liquid sublayer thickness, surface temperature at DNB are reported. No obvious temperature jumping is observed at DNB. To predict temperate excursion at Critical Heat Flux (CHF), more simulations to the transient boiling and film boiling processes are needed.
Liu, W.; Nariai, Hideki*
Journal of Heat Transfer, 127(2), p.149 - 158, 2005/02
Times Cited Count：12 Percentile：45.93(Thermodynamics)Homogeneous nucleation, although being discounted as a mechanism for vapor formation for water in most conditions, is found being possible to occur under some extreme conditions in subcooled flow boiling. In this paper, firstly, the existence of the homogeneous nucleation governed condition is indicated. Followed, a criterion is developed to judge a given working condition is the conventional one or the homogeneous nucleation governed one. With the criterion, subcooled flow boiling data are categorized and typical homogeneous nucleation governed datasets are listed. CHF triggering mechanism for the homogeneous nucleation governed condition is proposed and verified. Parametric trends of the CHF, in terms of mass flux, pressure, inlet subcooling, channel diameter and the ratio of heated length to diameter are also studied.
Kinoshita, Hidetaka; Nariai, Hideki*; Inasaka, Fujio*
JSME International Journal, Series B, 44(1), p.81 - 89, 2001/01
no abstracts in English
J.Boscary*; Araki, Masanori; ; *; Akiba, Masato
Fusion Technology, 35(3), p.289 - 296, 1999/05
no abstracts in English
J.Boscary*; Araki, Masanori; Akiba, Masato
JAERI-Research 97-053, 50 Pages, 1997/08
JAERI-Research-97-053.pdf:1.71MB
no abstracts in English
J.Boscary*; Araki, Masanori; Akiba, Masato
JAERI-Data/Code 97-033, 12 Pages, 1997/08
JAERI-Data-Code-97-033.pdf:0.51MB
no abstracts in English
Sudo, Yukio; *; ; Kaminaga, Masanori
Journal of Nuclear Science and Technology, 23(1), p.73 - 82, 1985/00
Times Cited Count：34 Percentile：93.68(Nuclear Science & Technology)no abstracts in English
*; ;
JAERI-M 9945, 25 Pages, 1982/01
no abstracts in English
Ono, Ayako; Sakashita, Hiroto*
no journal, ,
A macrolayer formation model for saturated and subcooled pool boiling is proposed, which is developed based on the visual observation of boiling behavior. The distribution of nucleation sites is assumed to distribute based on Poisson distribution. The predicted macrolayer thicknesses are used for the prediction of CHFs in saturated and subcooled pool boiling based on the macrolayer dryout model. The combination of the macrolayer dryout model and macrolayer formation model is able to predict the CHF well at least up to subcooling 40K.
