| Title |
Numerical Analysis of Flow Distribution in the Scaled-down APR+ Using Two-Equation Turbulence Models |
| Authors |
Gong Hee Lee ; Young Seok Bang ; Ae Ju Cheong |
| DOI |
http://dx.doi.org/10.6110/KJACR.2015.27.4.220 |
| Keywords |
전산유체역학 ; 유동 상사성 ; 형상 모델링 ; 원자로 내부유동 ; 난류 유동 Computational fluid dynamics ; Flow similarity ; Geometry modeling ; Reactor internal flow ; Turbulent flow |
| Abstract |
Complex thermal hydraulic characteristics exist inside the reactor because the reactor internals consist of fuel assembly, internal structures and so on. In this study, to examine the effect of Reynolds-Averaged Navier-Stokes (RANS)-based two-equation turbulence models in the analysis of flow distribution inside a 1/5 scaled-down APR+, simulation was performed using the commercial computational fluid dynamics software, ANSYS CFX R.13 and the predicted results were compared with the measured data. It was concluded that reactor internal flow pattern was locally different depending on the turbulence models. In addition, the prediction accuracy of k-ε model was superior to that of other two-equation turbulence models and this model predicted the relatively uniform distribution of core inlet flow rate. |