Direct-contact condensation of steam on cold water in stratified countercurrent flow

Technical Report · Tue Oct 01 04:00:00 EDT 1985

OSTI ID:6497091

Bankoff, S G; Kim, H J

Local condensation heat transfer coefficients have been measured for countercurrent stratified flow of steam and cold water at atmospheric pressure in a flat plate geometry at an inclination of 4/sup 0/, 30/sup 0/, and 33/sup 0/ from the horizontal. Pressure gradients are also measured which allow the calculation of local interfacial shear stresses. In addition, interfacial wave amplitudes are measured locally by means of contact probes, from which wave frequencies and spectral analyses can be deduced. The data are correlated in terms of the gas and liquid Reynolds numbers, both for the Nusselt number and dimensionless wave amplitudes. An improved correlation is obtained by employing the wave amplitudes directly in the heat transfer correlation. Shear stresses are calculated, which allow a new correlation for the interfacial friction factor. A turbulence-centered model is also modified, giving good agreement with the data. 62 refs., 40 figs.

• Research Organization: Northwestern Univ., Evanston, IL (USA). Dept. of Chemical Engineering
• OSTI ID: 6497091
• Report Number(s): NUREG/CR-4414; ON: TI86900244
• Country of Publication: United States
• Language: English

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FLUID MECHANICS
HEAT TRANSFER
HYDRAULICS
HYDROGEN COMPOUNDS
LOSS OF COOLANT
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VAPOR CONDENSATION
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