【摘要】 为了研究毛细多孔介质在液氮中的传热性能,进行了在试验件中不填充和填充超细玻璃棉的试验。采用低温热电偶连续测量试验件的5个不同位置的温度,得到了5条温度曲线。分析曲线表明超细玻璃棉对传热过程有明显的强化作用,且能使试验件在一段时间内保持相对稳定的低温。并从理论上分析了换热过程,整理了换热方程组。更多还原

【Abstract】 The heat transfer characteristics of capillary porous media in liquid nitrogen were studied.Five temperature curves were presented through successive temperature measuring with cryogenic thermocouples at five different positions of a experimental object.The analysis of the temperature curves showed that superthin glass cotton can enhance heat transfer to large extent in the experiment and make the experimental object maintain a relatively steady low temperature for a while.And the heat transfer process was analyzed theoretically and the applicable heat transfer equations were summarized.更多还原