Effect of precursory cooling on falling-film rewetting
Conference
·
· J. Heat Transfer, v. 97, no. 3, pp. 360-365
OSTI ID:4165189
An analytical model for falling-film wetting of a hot surface has been developed to account for the effect of cooling by droplet-vapor mixture in the region immediately ahead of the wet front. The effect of precursory cooling is characterized by a heat transfer coefficient decaying exponentially from the wet front. Based on the present model, the wet front velocity, as well as the temperature profile along a thin slab, can be calculated. It is demonstrated that the precursory cooling can increase the wet front velocity by an order of magnitude. Existing experimental data with variable flow rates at atmospheric pressure are shown to be successfully correlated by the present model. (auth)
- Research Organization:
- American Society of Mechanical Engineers, New York
- NSA Number:
- NSA-33-006836
- OSTI ID:
- 4165189
- Conference Information:
- Journal Name: J. Heat Transfer, v. 97, no. 3, pp. 360-365
- Country of Publication:
- United States
- Language:
- English
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*ECCS-- PERFORMANCE
*PWR TYPE REACTORS-- ECCS
220900* --Nuclear Reactor Technology--Reactor Safety
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N77100 --Reactors--Power Reactors
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220900* --Nuclear Reactor Technology--Reactor Safety
DROPLETS
FILM COOLING
HEAT TRANSFER
LOSS OF COOLANT
N77100 --Reactors--Power Reactors
Non-breeding
Light-water Moderated
Boiling Water-cooled
N77200 --Reactors--Power Reactors
Non-breeding
Light-water Moderated
Non-boiling Water-cooled
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