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Structure de l'écoulement diphasique gaz-liquide dans les échangeurs à plaques corruguées

Abstract : This study has been supported by the LEMTA and the associate lahoratories CEA-CENG GRETh in a national rescarch program on plate beat exchangers. Both the thermohydraulic and the hydrodynamic proper to the flow of newtonian or complex fluids arc now well known and the design of such exchangcrs does not set any difficult problem anymore. Although this kind of ex changer is widely used in two-phase systems, all the published works on this topic only involves plate fin exchangers. The main objectives or this work are firstly to establish a flow pattern map, secondly lo explain the friction mechanism (transfer mechanism) when the gas flux increases and when transition between two patterns occurs. The measurement of the local wall shear stress is made by electrochemical method call polarography and those of the local void fraction by an optical probe. The horizontal co-current gas-liquid flow has been first investigated using two kind of geometry (a bidimensionnal and a tridimensionnal) then the vertical upward one.
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Submitted on : Thursday, March 29, 2018 - 10:55:31 AM
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  • HAL Id : tel-01747240, version 1



Michel Gradeck. Structure de l'écoulement diphasique gaz-liquide dans les échangeurs à plaques corruguées. Autre. Université Henri Poincaré - Nancy 1, 1996. Français. ⟨NNT : 1996NAN10302⟩. ⟨tel-01747240⟩



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