MEASUREMENTS OF BURNOUT CONDITIONS FOR FLOW OF BOILING WATER IN VERTICAL ROUND DUCTS. PART 2

S>The results of the second phase of an experimental investigation of burnout conditions for flow of boiling water in vertical round ducts are presented. Eight hundred and nine burnout measurements were obtained. The results are presented in diagrams, where for a certain geometry, the burnout steam qualities, x/sub BO/, were plotted against the pres sure with the surface heat flux as parameter. The data were correlated by curves, and the scatter around the curves is less than plus or minus 5%. In the ranges investigated, the observed steam quality at burnout, xso, generally decreased with increasing heat flux and mass velocity but increased with increasing pressure. The data were compared with the empirical correlation by Tong and excellent agreement was found for pressures higher than 10 kg/cm/sup 2/. (auth)

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