为了得到熔融盐自然对流传热规律,本文在数值计算的基础上,采用焦耳加热方法首先对水平微细金属丝在空气和水中的自然对流传热规律进行了实验研究,在验证了实验方法,实验系统及实验设备选择的可靠性后,对熔融盐硝酸锂的自然对流传热规律进行了实验研究.结果表明,无论是计算结果还是实验结果,都与考虑黏性耗散影响的Fand关联式符合较好. In order to get the natural convection heat transfer law of molten salt, this paper first studied the natural convection heat transfer rule of horizontal fine metal wire in air and water by Joule heating method on the basis of numerical calculation. After verifying the experimental method and experiment System and experimental equipment, the natural convection heat transfer law of molten salt of lithium nitrate is studied experimentally.The results show that both the calculation results and the experimental results are consistent with the Fand correlation which considers the influence of viscous dissipation better.