U-shaped channel is a common unit structure in heat exchanger.The pressure loss and heat transfer characteristics of U-shaped channel have important influence on the comprehensive performance of heat exchanger.In this...U-shaped channel is a common unit structure in heat exchanger.The pressure loss and heat transfer characteristics of U-shaped channel have important influence on the comprehensive performance of heat exchanger.In this paper,combined with the thermo-physical property of supercritical CO_(2)(SCO_(2)),the influence of the guide vanes on the pressure loss and heat transfer characteristics of SCO_(2)in U-shaped channel was studied numerically.The four different guide vanes included integral guide vane,two-stage symmetric guide vane,two-stage asymmetric guide vane and discrete guide vane.CO_(2)Real Gas Property file(RGP)was imported into ANSYS CFX commercial software for calculation,and the turbulence model was SST k-ω.At the same time,the influence of different inlet Reynolds numbers and heating conditions of channel wall were also studied.展开更多
基金supported by the National Natural Science Foundation of China(No.52076143)。
文摘U-shaped channel is a common unit structure in heat exchanger.The pressure loss and heat transfer characteristics of U-shaped channel have important influence on the comprehensive performance of heat exchanger.In this paper,combined with the thermo-physical property of supercritical CO_(2)(SCO_(2)),the influence of the guide vanes on the pressure loss and heat transfer characteristics of SCO_(2)in U-shaped channel was studied numerically.The four different guide vanes included integral guide vane,two-stage symmetric guide vane,two-stage asymmetric guide vane and discrete guide vane.CO_(2)Real Gas Property file(RGP)was imported into ANSYS CFX commercial software for calculation,and the turbulence model was SST k-ω.At the same time,the influence of different inlet Reynolds numbers and heating conditions of channel wall were also studied.
