In order to improve the prediction ability of the sub-channel code for the local parameter changes under rod-bowing condition,a fined sub-channel rod-bowing model was developed in this study.The model,based on a detailed division of the sub-channels,allows a comprehensive analysis of rod bowing.The prediction ability of the fined sub-channel rod-bowing model on the axial flow and cross flow of the sub-channel was validated by computational fluid dynamics(CFD).Based on the validity of the model by CFD,the analysis of the trends of axial and transverse flows in the rod-bowing section was conducted.The results show that the predictions of the changing trends of axial flow and cross flow by ATHAS and CFD are basically consistent,and the fined sub-channel rod bowing model can better predict the changing trend of axial flow and cross flow caused by rod bowing.Therefore,the fined sub-channel rod bowing model can predict the influence of bowing rod on local flow field,which provides a basis for the prediction of critical heat flux.
Fine sub-channelsRod bowingDistributed resistance model
维普
万方数据
