D112 稠密燃料集合体内圧力損失に対する揚力モデルの影響の評価(OS10 混相流動)

概要

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Japan Atomic Energy Agency (JAEA) develops three dimensional two-fluid model analysis code ACE-3D that adopts boundary fitted coordinate system in order to simulate complex shape flow channel. In this paper, boiling two-phase flow analysis in a tight-lattice rod bundle was performed by ACE-3D code, and predicted pressure loss was compared with experimental result. The predicted friction pressure loss was underestimated around 20% of measured values, and the effect of the turbulence model is considered as one of the causes of this underestimation. To evaluate effects of two-phase flow model used in ACE-3D code on pressure loss, numerical simulation of boiling two-phase in tight-lattice rod bundle with no lift force model was also performed. In the results, the prediction accuracies of the pressure loss improve by considering the lift force.
一般社団法人日本機械学会の論文
2009-06-28