不同介质在复杂结构微通道中的换热特性研究

he selection of medium types and microchannel structures is of great value for improving the heat transfer efficiency of small modular reactors and ensuring their operational safety. Based on Fluent simulation, the flow and heat transfer characteristics of media such as water, supercritical carbon dioxide, and lead bismuth liquid metal in different complex microchannels were studied using the RSM model, and heat transfer coefficient calculations and flow field analysis were carried out. The results indicated that the presence of rib structures can improve the fluid heat transfer performance in rectangular microchannels;The staggered arrangement of ribs has the strongest ability to improve heat transfer performance;Supercritical carbon dioxide has the strongest heat transfer performance and the worst water.