Corresponding States Correlations for Pool and Flow Boiling Burnout

Abstract

The peak pool boiling heat flux can be nondimensionalized so the dimensionless peak heat flux is a function of a Bond or Laplace number that characterizes the system geometry. The dimensionless peak heat flux can be interpreted as the product of a geometrical function (given by previous investigations), universal functions of the reduced saturation pressure, and the Pitzer acentric factor. The latter universal functions are constructed by correlation. These are combined to give a single prediction of the peak heat flux that applies to all the common geometrical heater configurations. The probable error of the prediction, when it is compared with the available peak heat flux data, is 6.1 percent for substances whose dipole moment is not high. The method is also extended to create a comparable correlation for flow boiling burnout during crossflows over cylinders. There is a lack of data with which to check this correlation fully.