CAJ | 학술논문

对液态金属钠在环形通道内的单相流动换热特性进行了实验研究。结合实验数据，将液态金属钠单相流动分为层流区（Re≤2000）、过渡区（2000＜ Re≤4000）及湍流区（Re＞4000），分别拟合得到不同流态下摩擦系数的计算关系式，并拟合得到液态金属钠环形通道内换热特性的相应关系式。结果表明：液态金属钠单相流动特性与常规流体（如水）类似，其层流区摩擦系数略大于水，湍流区与水的很接近。液态金属钠对流换热过程中，导热项占较大份额，同时 N u随 Pe的增大而略有增大。
대액태금속납재배형통도내적단상류동환열특성진행료실험연구。결합실험수거，장액태금속납단상류동분위층류구（Re≤2000）、과도구（2000＜ Re≤4000）급단류구（Re＞4000），분별의합득도불동류태하마찰계수적계산관계식，병의합득도액태금속납배형통도내환열특성적상응관계식。결과표명：액태금속납단상류동특성여상규류체（여수）유사，기층류구마찰계수략대우수，단류구여수적흔접근。액태금속납대류환열과정중，도열항점교대빈액，동시 N u수 Pe적증대이략유증대。
Experimental research on the heat transfer characteristic of liquid sodium flowing in annulus was done .On the basis of the experimental data ,the flow regime was divided into laminar flow (Re≤2 000) ,transition flow (2 000< Re≤4 000) and turbulent flow (Re>4 000 ) .Correlations for the friction coefficient and heat transfer characteristics in different regions were obtained respectively .The results show that the flow characteristics of sodium are similar to those of water .In the laminar flow ,the friction coefficient of liquid sodium is a little higher than that of water ,while in the turbulent flow ,they are almost equal .T he heat conduction takes up a large part in the heat transfer process ,and Nu increases with Pe .