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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

EVALUATION OF INTERCHANNEL EXCHANGE MODELS WITH A SUBCHANNEL ANALYSIS CODE

Get access (open in a dialog) DOI: 10.1615/IHTC11.2110
pages 33-38

Resumo

The effects of transverse mixing models between subchannels such as turbulent mixing and void drift have been investigated at single- and two-phase flow conditions. Three kinds of experimental data (PNL 2-channel, GE 9-rod, and ISPRA 16-rod experiments) have been evaluated by the subchannel analysis code COBRA-IV-I employing the simple void drift model of Lahey considering the tendency of void migration to wider channels. As the result of the analysis, a flow-pattem-dependent correction factor for the equilibrium void distribution term has been devised. It revealed that the proposed model successfully predicts the lower-than-average qualities of corner subchannels.