不同介質在復雜結構微通道中的換熱特性研究
首發時間:2023-09-27
摘要:介質種類和微通道結構的選擇對于提高小型模塊化反應堆的換熱效率、確保反應堆的運行安全具有重要價值?;贔luent模擬,使用RSM模型研究水、超臨界二氧化碳以及鉛鉍液態金屬等介質在不同矩形截面微通道中的流動換熱特性,進行換熱系數計算及流場分析。結果表明:肋片結構的存在可以提高矩形微通道內流體換熱性能;交錯排布的肋片提高換熱性能的能力最強;超臨界二氧化碳的換熱性能最強,水最差。
關鍵詞: 小型模塊化反應堆 微通道 超臨界二氧化碳 鉛鉍 換熱系數
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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: SMR microchannels supercritical carbon dioxide lead bismuth heat transfer coefficient
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不同介質在復雜結構微通道中的換熱特性研究
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