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Caractérisation des transferts de chaleur convectifs d'un écoulement refroidi de dioxyde de carbone supercritique

Abstract : Study on convective heat transfer of supercritical carbon dioxyde flow have been performed. An experimental apparatus was build, allowing an experimental investigation of heat transfer and pressure drop during cooling of supercritical CO2 turbulent flows. Horizontal and vertical flows were considered.
Experimental results on vertical flows show that heat transfer coefficient reach a peak at a temperature close to the pseudo-critical one and that the peak value is decreasing with increasing pressure. A strong influence of mixed convection has to be taken into account too. Results were presented on a classical form used in mixed convection studies in heating condition, leading to the conclusion that mixed convection behaviors are quite similar in heating and cooling conditions.
A numerical model for supercritical fuids flows was developped too, in heating conditions.
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Submitted on : Thursday, May 10, 2007 - 2:27:26 PM
Last modification on : Thursday, November 19, 2020 - 3:54:10 PM
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Arnaud Bruch. Caractérisation des transferts de chaleur convectifs d'un écoulement refroidi de dioxyde de carbone supercritique. Energie électrique. Université Joseph-Fourier - Grenoble I, 2006. Français. ⟨tel-00145484⟩

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