Heat Transfer by Gas-Liquid Mixture in Forced Turbulent Flow with Weak Vaporization of the Liquid Phase; TRANSFERT DE CHALEUR PAR MELANGE DE LIQUIDE ET DE GAZ EN CONVECTION FORCEE TURBULENTE AVEC FAIBLE VAPORISATION DE LA PHASE LIQUIDE
Measurements were made of heat transfer and pressure drop in two-phase liquid flow. The stream was of the annular dispersed type, obtained by introducing a small quantity of liquid in a gas turbulent flow. The heat transfer experiments were performed without vaporization of the liquid phase. A notable improvement of the heat transfer coefficient of such a stream was observed, compared with a gas-alone or liquid-alone flow. The improvement concerning the gas-alone was of about 20 when compared with the same gas Reynolds number, of about 8 when it is compared with the same total mass flow rate. A hydrodynamic study of the flow pattern demonstrates the original structure of the flow, and allows the experimental results to be predicted by means of a simplified theory. (P.C.H.)
- Research Organization:
- France. Commissariat a l'Energie Atomique. Centre d'Etudes Nucleaires, Grenoble
- NSA Number:
- NSA-17-025408
- OSTI ID:
- 4701104
- Report Number(s):
- CEA-2196
- Country of Publication:
- France
- Language:
- English
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