东南大学学报（自然科学版）2025，Vol.55Issue(3)：824-830,7.DOI:10.3969/j.issn.1001-0505.2025.03.024
镓在矩形窄通道中的流动换热特性研究
Study on flow heat transfer characteristics of gallium in narrow rectangular channel
摘要
Abstract
Liquid metal gallium is becoming a promising candidate for new coolant applications due to its low melt-ing point,high heat capacity,and chemical stability.Numerical simulations were conducted to study gallium's flow and heat transfer characteristics in narrow rectangular channels.By varying flow velocity and temperature,the changes of the convective heat transfer coefficient and pressure drop with the Pe and Re numbers were ana-lyzed.The distributions of responses were analyzed.In addition,the heat transfer performance of gallium,so-dium,and lead-bismuth alloy in narrow rectangular channels was compared.The results show that gallium's con-vective heat transfer coefficient is proportional to the Pe number,with a significant increase in heat transfer capac-ity as temperature rises.At 600 and 700 K,the heat transfer coefficients increase by 20%and 35%,respectively,compared with 500 K.The pressure drop increases with rising Re numbers,resulting in higher flow losses.How-ever,an increase in temperature reduces the pressure drop due to lower viscosity.The heat transfer coefficient of gallium and sodium is about twice that of lead-bismuth alloy at 600 K.Gallium and sodium have lower pressure drops than lead-bismuth alloy,indicating their superior heat transfer and flow performance in narrow channels.Gallium demonstrates better heat transfer capability and lower pressure drop at higher temperatures,making it suit-able as a coolant for narrow channels,which can benefit the development of small and micro-sized reactors.关键词
第四代反应堆/镓/矩形窄通道/钠/铅铋合金/流动换热Key words
fourth generation reactor/gallium/narrow rectangular channel/sodium/lead-bismuth alloy/flow heat transfer分类
能源科技引用本文复制引用
周涛,姚垚,袁明..镓在矩形窄通道中的流动换热特性研究[J].东南大学学报（自然科学版）,2025,55(3):824-830,7.基金项目
江苏省双创人才经费资助项目(JSSCRC2021500) （JSSCRC2021500）
国家重点研发计划资助项目(2020YFB1901701) （2020YFB1901701）
国防科技工业核动力技术创新中心资助项目(HDLCXZX-2022-HD-010-01). （HDLCXZX-2022-HD-010-01）
