SOME DATA ON THE EFFECT OF ADDED OXYGEN ON HEAT EMISSION AS SODIUM FLOWS THROUGH A COOLED PIPE,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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The solving of the problem of contact thermal resistance which was discovered in working with liquid-metal heat carriers, particularly with alkali metals, to a great extent determines the effectiveness and dependability of heat-exchange equipment. The presence of contact resistance outwardly reveals itself in the lowering of the coefficient of heat emission as compared with the theoretical values, and also in the instability of the heat exchange in time. Work was carried out for the purpose of obtaining data on the effect on the extent of this contact resistance on temperature conditions and its relationship to relative content of oxygen in the sodium. The results of the experiments indicate that the cause of the phenomenon of contact thermal resistance on a cooled surface is the admixture of sodium oxide deposited from the liquid metal.
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