Study on Numerical Calculation of the Shell Side Flow Field of the Space Spiral Section in Intermediate Heat Exchanger in China Experimental Fast Reactor

In the study of flow-induced vibration of nuclear grade heat exchanger, the distribution law of the flow field should be analyzed firstly. Taking the Intermediate Heat Exchanger(IHX) in China Experimental Fast Reactor (CEFR) as the research object, the computational fluid dynamics (CFD) method is used to establish the numerical calculation model of the shell side flow field of the elbow section of the heat exchanger in this paper. Method of the flow field distribution of the bend pipes is studied and analyzed, and the distribution characteristics of the flow field in the elbow section under different inlet velocity are analyzed. The results show that the flow angle and transverse flow velocity at the inlet of the elbow section are all larger. In the design, operation and maintenance of the heat exchanger, we should pay attention to the entrance of the elbow section. (paper)