Transient convective heat transfer of steam–water two-phase flow in a helical tube under pressure drop type oscillations

2002 ◽  
Vol 45 (3) ◽  
pp. 533-542 ◽  
Author(s):  
Lie-Jin Guo ◽  
Zi-Ping Feng ◽  
Xue-jun Chen
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Helical Tube

CONVECTIVE HEAT TRANSFER OF AN IMPINGING OIL JET BETWEEN A TWO-PHASE FLOW AND A HOT SURFACE

2012 ◽  
Vol 22 (3) ◽  
pp. 185-205
Author(s):  
Ludovic Osmar ◽  
S. Vincent ◽  
J.-P. Caltagirone ◽  
David Reungoat ◽  
G. Mermaz-Rollet
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Oil Jet ◽  
Hot Surface

Radiative-convective heat transfer for high-temperature two-phase flow around bodies

1993 ◽  
Vol 64 (3) ◽  
pp. 239-242
Author(s):  
V. E. Abaltusov ◽  
N. N. Alekseenko ◽  
V. F. Dementiev ◽  
T. N. Nemova
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

Transient Convective Heat Transfer in a Helical Tube With Steam-Water Two-Phase Flow Under Pressure Drop Type Oscillations

2000 ◽  
Author(s):  
Lie-Jin Guo ◽  
Zi-Ping Feng
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Secondary Flow ◽  
Two Phase Flow ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Phase Flow ◽  
Two Phase ◽  
Wide Range ◽  
Helical Tube

Abstract In the present paper the experiments for subcooled water flow and steam-water two-phase flow were conducted to investigate the effects of pulsation upon transient heat transfer characteristics in a closed-circulation helical-coiled tube steam generator. The non-uniform property of local heat transfer with steady flow was also examined. The secondary flow mechanism and the effect of interaction between the flow oscillation and secondary flow were analyzed on the basis of the experimental data. Some new phenomena were observed and explained. A series of correlations were proposed for the average and local heat transfer coefficients both under steady and oscillatory flow conditions. The results showed that there were considerable variations in local and peripherally time-averaged Nusselt numbers for pulsating flow in a wide range of parameters. Systematic investigations of pressure drop type oscillations and their thresholds for steam-water two-phase flow in a uniformly heated helical tube were also reported.

CFD Analysis of Two-Phase Flow and Convective Heat Transfer in PEMFC Ducts

2008 ◽  
Author(s):  
Jinliang Yuan ◽  
Huamin Zhang ◽  
Bengt Sunde´n
Keyword(s):  
Heat Transfer ◽  
Boundary Conditions ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Porous Layer ◽  
Two Phase Flow ◽  
Active Surface ◽  
Main Stream ◽  
Phase Flow ◽  
Two Phase

In this study, a three-dimensional computational method was developed to predict convective heat transfer combined with water phase change/two-phase flow in a PEMFC cathode duct. Momentum, heat transport and species equations have been solved by coupled source terms and thermo-physical properties of the multi-component mixture. Advanced boundary conditions are applied at the cathode duct external walls in the analysis, i.e., combined thermal boundary conditions of heat flux on the active surface and thermal insulation on the remaining solid walls. Moreover, effects of mass consumption and generation appearing on the active surface are implemented. The calculated results reveal that the thermal conditions at the interfaces vary along the main stream, and a big permeability of the porous layer promotes the bulk gas transport and the generated liquid water removal via the bottom interface between the flow duct and the porous layer, and a big convective heat transfer coefficient as well.

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