Heat Transfer From Spheres Into Subcooled Liquid Sodium During Forced Convection

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Abstract
Heat transfer rates from 1/2-in-dia spheres were measured as the sphere moved through a pool of subcooled liquid sodium. Measurements were made at atmospheric pressure and with sodium at 572 and 842 deg F. Sphere temperatures ranged up to 3600 deg F. Heat transfer rates up to 3.6 × 107 Btu/hr sq ft were calculated from the experimental data. It was shown in this study that large amounts of subcooling in the liquid sodium and motion of the sphere tend to prevent the formation of vapor at the surface of high-temperature spheres. These experimental data were correlated by a theory in which it was assumed that highly superheated liquid sodium would be in contact with a high-temperature sphere.

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