INVESTIGATION OF LIQUID METAL BOILING HEAT TRANSFER.
Quarterly progress rept. no. 3, 15 Nov 6315 Feb 64,
MICHIGAN UNIV ANN ARBOR COLL OF ENGINEERING
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Burnout data were obtained for water and sodium in the same equipment used previously for potassium studies. Further studies with sodium will be attempted after which rubidium will be charged to the system and similar studies undertaken. Recent film boiling data obtained by condensing sodium on the bottom side of a horizontal disk on top of which potassium is boiled have yielded inconclusive results. Stable film boiling was observed to have occurred with the pressure in the potassium chamber less than 1 inch of mercury. Upon increasing the power to the sodium instabilities were observed which caused the system to oscillate as if in the transition regime. The forced circulation apparatus was used early in this last quarter to obtain additional two phase pressure drop data. An analysis of the two phase pressure drop data has revealed departures from the MartinelliNelson or Lockhard type of correlation. Similar deviations have been observed with other data for metallic fluids. A friction factor correlation is proposed which correlates data for metallic systems. Author