不同介质在复杂结构微通道中的换热特性研究
首发时间:2023-09-27
摘要:介质种类和微通道结构的选择对于提高小型模块化反应堆的换热效率、确保反应堆的运行安全具有重要价值。基于fluent模拟,使用rsm模型研究水、超临界二氧化碳以及铅铋液态金属等介质在不同矩形截面微通道中的流动换热特性,进行换热系数计算及流场分析。结果表明:肋片结构的存在可以提高矩形微通道内流体换热性能;交错排布的肋片提高换热性能的能力最强;超临界二氧化碳的换热性能最强,水最差。
关键词: 超临界二氧化碳
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study on heat transfer characteristics of different medium in complex structure microchannels
abstract:the 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.
keywords: supercritical carbon dioxide
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不同介质在复杂结构微通道中的换热特性研究
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