CFD Analysis of Effect of Helix Rib on Flow and Heat Transfer of Supercritical Water in Square Annular Channel

This paper presents a primary numerical simulation on the heat transfer behavior of supercritical water in smooth square annular channel and square annular channel with helix rib.The simulation results indicated that the heat transfer behavior of supercritical in smooth square channel is greatly non-uniformity in circumference.The helix rib can enhance the heat transfer in the square annular channel and reduce the circumferential non-uniformity of heat transfer.In addition,the helix rib will increase the flow resistance in the square annular channel,which will add more works to the main pump.So,there is need to consider the heat transfer,flow mixed and flow resistance comprehensively in the design of the helix rib of SCWR.