サブチャンネル間における気液二相流混合に関する研究 : 第2報, 定常差圧がない場合での変動差圧モデルの検証

概要

論文の詳細を見る
The cross-flow between two subchannels in a BWR fuel assembly has typically been analyzed using three types of mixing models, namely, pressure difference, turbulent mixing and void drift, which are expressed by time-averaged flow parameters. However, in our previous paper, we expressed the above cross flow phenomenon simply by a fluctuating pressure model and confirmed its validity experimentally. In this study, we examine the relationship between the fluctuating pressure difference and the cross-flow rate more precisely by using a short mixing zone with no steady pressure difference. Results show that the experimental cross flow data agree well with the calculations applied to the model. Furthermore, we tried to express the fluctuating pressure difference by using a sinusoidal wave as a new cross-flow model. It was shown that the model has no dependence on frequency. We verified that the cross flow could be analyzed using only the pressure difference amplitude.
社団法人日本機械学会の論文
1997-09-25