OS8-1 稠密三角格子サブチャンネル間の差圧移動 : クロスフロー抵抗係数と界面摩擦係数の実験値(OS8 軽水炉・新型炉・核燃料サイクル,分散と集中の共存)

概要

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Single- and two-phase diversion cross-flows arising from the pressure difference between tight lattice subchannels are our concern in this study. In order to obtain a correlation of the diversion cross-flow, we conducted adiabatic air-water experiments using a vertical multiple-channel with two subchannels simplifying the triangle tight lattice rod bundle. In the experiments, data were obtained on the axial variations in the pressure difference between the subchannels, the ratio of flow rate in one subchannel to the whole channel, and the void fraction in each subchannel for two-phase flow case. These data were analyzed by use of a lateral momentum equation based on a two-fluid model to determine both the cross-flow resistance coefficient between liquid phase and channel wall and the gas-liquid interfacial friction coefficient. The resulting coefficients have been correlated in a similar way (Kano et al., 2002) developed for square lattice subchannel.
社団法人日本機械学会の論文
2006-06-28