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Étude expérimentale de l'évaporation flash d'un film d'eau

Abstract : Evaporation flash (or flashing) is the process which releases vapour from a liquid flow or a tank containing a liquid by sudden variation of the thermodynamic properties below the saturation conditions of this liquid. This work shows the experimental study of the influence of parameters such as the superheat, the initial level of liquid, or the rate of depressurisation on the kinetics of flash evaporation phenomenon of a water film. At the end of this study, dimensionless correlations connecting the evaporated maximum flow, the time of flashing (t*) or the mass evaporated at time t* with the initial temperature, the rate of depressurisation, the initial water level, and the superheat of the liquid could be proposed. These ones also point out the evolution of the kinetics of the phenomenon with the parameters quoted previously and provide some optimisation criteria.
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Submitted on : Thursday, November 12, 2020 - 3:56:28 PM
Last modification on : Wednesday, December 8, 2021 - 10:32:02 AM
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  • HAL Id : tel-03001965, version 1


Didier Saury. Étude expérimentale de l'évaporation flash d'un film d'eau. Génie mécanique [physics.class-ph]. Université de Valenciennes et du Hainaut-Cambrésis, UVHC, (France), 2003. Français. ⟨NNT : 2003VALE0020⟩. ⟨tel-03001965⟩



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