E113 VOF法を用いたPWRホットレグ内での対向流の数値シミュレーション(OS9 熱・流動(解析))

概要

論文の詳細を見る
In order to evaluate CCFL (countercurrent flow limitation) characteristics in a PWR hot leg under reflux condensation, numerical simulations have been done using a two-fluid (2F) model and a VOF (volume of fluid) method implemented in the CFD software, FLUENT6.3.26. The 2F model gave good agreement with CCFL data under low pressure conditions but did not give good results under high pressure steam-water conditions. On the other hand, the VOF method gave good agreement with CCFL data for tests with a rectangular channel but did not give good results for calculations in a circular channel. Therefore, in this study, the computational grid and schemes were improved in the VOF method, numerical simulations were done for steam-water flows at 1.5MPa under PWR full-scale conditions with the inner diameter of 0.75m, and the calculated results were compared with the UPTF data at 1.5MPa. As a result, the calculated CCFL characteristics agreed well with the UPTF data at 1.5MPa.
一般社団法人日本機械学会の論文
2011-06-22