钠热管启动过程轴向传热与稳态径向传热特性研究  

Study on Axial Heat Transfer and Steady-state Radial Heat Transfer Characteristics of Sodium Heat Pipe During Start-up Process

作　　者：周政[1,2] 马在勇 马誉高 吴奇[1,2] 张卢腾 孙皖 朱隆祥 潘良明[1,2] ZHOU Zheng;MA Zaiyong;MA Yugao;WU Qi;ZHANG Luteng;SUN Wan;ZHU Longxiang;PAN Liangming(Key Laboratory of Low-grade Energy Utilization Technologies and Systems,Ministry of Education,Chongqing University,Chongqing 400044,China;Department of Nuclear Engineering and Technology,Chongqing University,Chongqing 400044,China;Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu 610213,Sichuan Province,China)

机构地区：[1]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044 [2]重庆大学核工程与核技术系,重庆400044 [3]中国核动力研究设计院核反应堆系统设计技术重点实验室,四川成都610213

出　　处：《动力工程学报》2025年第2期165-170,共6页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(11905021);国防科技重点实验室基金资助项目;重庆市研究生科研创新资助项目(CYS23067)。

摘　　要：为定量研究钠热管轴向热阻分布特性及径向传热特性,开展了钠热管启动过程中轴向传热及稳态径向传热实验。结果表明:启动过程中加热功率对轴向传热等效热阻的影响显著,随着功率的增大,其轴向传热等效热阻先减小后趋于平缓;在低倾角工况下,轴向传热等效热阻显著增大,倾角较大时其影响较小;温度在350℃以下时,蒸汽处于自由分子流状态,汽液界面热阻可达10^(-4)(m^(2)·K)/W的量级,而更高温度下的蒸汽处于连续流状态,汽液界面热阻仅为10^(-6)~10^(-5)(m^(2)·K)/W;热管固液界面上存在可能由氧化层导致的传热热阻,量级为10^(-4)(m^(2)·K)/W,在低温下该热阻占热管径向传热总热阻的60%左右,其随温度的升高略有增大,在650℃时可达总热阻的80%。To quantitatively explore axial thermal resistance distribution and radial heat transfer characteristics,experiments on axial heat transfer and steady-state radial heat transfer during startup process were conducted.Results show that the heating power has a significant impact on the axial equivalent heat transfer thermal resistance during the start-up process.As the power increases,the axial equivalent heat transfer thermal resistance first decreases and then tends to flatten out.Under low inclination angles,the axial equivalent thermal resistance significantly increases,and its impact is relatively small when the inclination angle is large.When the temperature is below 350℃,steam is in free molecular flow state,and the thermal resistance of the vapor-liquid interface can reach the order of 10^(-4)(m^(2)·K)/W.At higher temperatures,steam is in continuous flow state,and the thermal resistance of the vapor-liquid interface is only 10^(-6)~10^(-5)(m^(2)·K)/W.There may exist heat transfer thermal resistance caused by the oxide layer at the solid-liquid interface of the heat pipe,with the magnitude of 10^(-4)(m^(2)·K)/W.At low temperatures,this thermal resistance accounts for about 60%of the total radial heat transfer thermal resistance of the heat pipe,and it slightly increases with temperature.At 650℃,it can reach 80%of the total thermal resistance.

关 键 词：钠热管 轴向传热 径向传热 热阻 

分 类 号：TL331[核科学技术—核技术及应用]