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Article Dans Une Revue Experimental Thermal and Fluid Science Année : 2014

Experimental investigation of heat transfer in transient boiling

Résumé

During an hypothetical reactivity initiated accident in the core of a nuclear reactor, a power excursion occurs on some fuel rods. The consequent rapid boiling is a matter of study for the nuclear power plants safety evaluation, because of the risk for rod-clad failure. In order to better understand the influence of power excursions and to characterize the phases of the rapid boiling phenomenon, an experimental set-up has been built at the Institut de Mécanique des Fluides de Toulouse (IMFT). The test section is a semi annulus. The inner half cylinder is made of a stainless steel foil, heated by Joule effect. Thanks to the design of the facility, synchronized wall temperature measurement and flow visualization allow to characterize and analyze the heat transfer for the different boiling regimes nucleate boiling, critical heat flux and film boiling. From the main results, the impact of the wall heating rate on the boiling curve is discussed. The more the heating rate increases, the higher the heat flux is. © 2014 Elsevier Inc.
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Dates et versions

hal-02614059 , version 1 (20-05-2020)

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R. Visentini, Catherine Colin, P. Ruyer. Experimental investigation of heat transfer in transient boiling. Experimental Thermal and Fluid Science, 2014, 55, pp.95-105. ⟨10.1016/j.expthermflusci.2014.02.026⟩. ⟨hal-02614059⟩
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