B207 BWR模擬2×1ロッド流路内の気泡流における気泡抗力係数に関する研究(OS8 熱流動),動力エネルギーシステム部門20周年,次の20年への新展開)

概要

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In order to get an accurate constitutive equation of the interfacial friction force in two-phase bubble flows, experimental data on drag coefficient and interfacial area concentration have been obtained for air-water flows in 2×1 rods channel simplifying a BWR fuel rod bundle. To know the effects of liquid properties on the data, temperature of the test water was changed from 18 to 50℃. The data are compared with the existing correlations reported in literatures. As a result for an interfacial area concentration, Hibiki and Ishii (2001) semi-theoretical correlation is found to give the best prediction against the present data. As for the drag coefficient, no correlations exist which can predict well the present data. Therefore, we developed a new correlation including three dimensionless numbers, i.e., bubble Capillary number, Morton number and Eotvos number. The correlation could predict well Liu et al.'s data (2008) as well as the present data.
一般社団法人日本機械学会の論文
2010-06-20