| Title |
Numerical Analysis for Flow Distribution inside a Fuel Assembly with Swirl-type Mixing Vanes |
| Authors |
Gonghee Lee ; Andong Shin ; Aeju Cheong |
| DOI |
http://dx.doi.org/10.6110/KJACR.2016.28.5.186 |
| Keywords |
전산유체역학 ; 헌합날개 ; 봉다발 ; 부수로 ; 선회 형태 ; 난류 유동 Computational fluid dynamics ; Mixing vane ; Rod bundle ; Subchannel ; Swirl-type ; Turbulent flow |
| Abstract |
As a turbulence-enhancing device, a mixing vane installed at a spacer grid of the fuel assembly plays a role in improving the convective heat transfer by generating either swirl flow in the subchannels or cross flow between fuel rod gaps. Therefore, both configuration and arrangement pattern of a mixing vane are important factors that determine the performance of a mixing vane. In this study, in order to examine the flow distribution features inside 5×5 fuel assembly with swirl-type mixing vanes used in benchmark calculation of OECD/NEA, simulations were conducted with commercial CFD software ANSYS CFX R.14. Predicted results were compared to data measured from MATiS-H (Measurement and Analysis of Turbulent Mixing in Subchannels-Horizontal) test facility. In addition, the effect of swirl-type mixing vanes on flow pattern inside the fuel assembly was described. |