| Title |
Numerical Analysis for the Effect of Flow Skirt Geometry on the Flow Distribution in the Scaledown APR+ |
| Authors |
이공희(Gong Hee Lee) ; 방영석(Young Seok Bang) ; 우승웅(Sweng Woong Woo) ; 김도형(Do Hyeong Kim) ; 강민구(Min Ku Kang) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2013.25.5.269 |
| Keywords |
전산유체역학 ; 유동 상사성 ; 유동 덮개 ; 다공성 모델 ; 원자로 내부 유동 ; 난류 유동 Computational Fluid Dynamics ; Flow Similarity ; Flow Skirt ; Porous Model ; Reactor Internal Flow ; Turbulent Flow ; |
| Abstract |
In this study, in order to examine the applicability of computational fluid dynamics with the porous model to the analysis of APR+ (Advanced Power Reactor Plus) internal flow, simulation was conducted with the commercial multi-purpose computational fluid dynamics software, ANSYS CFX V.14. In addition, among the various reactor internals, the effect of flow skirt geometry on reactor internal flow was investigated. It was concluded that the porous model for some reactor internal structures could adequately predict the hydraulic characteristics inside the reactor in a qualitative manner. If sufficient computation resource is available, the predicted core inlet flow distribution is expected to be more accurate, by considering the real geometry of the internal structures, especially located in the upstream of the core inlet. Finally, depending on the shape of the flow skirt, the flow distribution was somewhat different locally. The standard deviation of the mass flow rate (σ) for the original shape of flow skirt was smaller, than that for the modified shape of flow skirt. This means that the original shape of the flow skirt may give a more uniform distribution of mass flow rate at the core inlet plane, which may be more desirable for the core cooling. |