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ISSN Online: 2377-424X

International Heat Transfer Conference 3
August, 7-12, 1966, Chicago, USA

"THE EFFECT OF AXIAL HEAT FLUX DISTRIBUTION ON CRITICAL HEAT FLUX IN ANNULAR, TWO-PHASE FLOW"

Get access (open in a dialog) DOI: 10.1615/IHTC3.10
pages 78-85

要約

A systematic experimental and analytic investigation of the effect of nonuniform axial heat flux distribution on critical heat flux was performed with water in the quality condition. Experimental data were obtained for flux distributions representing cosine, linear increasing and decreasing, inlet and exit peaked, spike and uniform shapes. Utilizing a model which ascribes the critical condition to either a nucleation induced disruption of the annular liquid film or annular film dryout, the experimental results taken at low pressures (50-200 psia) were confirmed. It is proposed that the occurrence of the critical condition is related to the local degree of nucleation (the ratio of the local flux to the flux required to cause nucleation at the local conditions) and the local film flow rate. Application of this model to higher pressure conditions indicated qualitative agreement with available date of other investigators.