毛细多孔介质在液氮中的传热试验研究  

An experimental study of heat transfer characteristics of capillary porous media in liquid nitrogen

作　　者：陈叔平[1] 李慧燕[1] 陈光奇[2] 温永刚[2] 孙李宁[1] 苏海林[1] 王贵仁[1] 

机构地区：[1]兰州理工大学石油化工学院,兰州730050 [2]兰州物理研究所,兰州730000

出　　处：《低温与超导》2007年第4期298-299,303,共3页Cryogenics and Superconductivity

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。The heat trartsfer 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 appli- cable heat transfer equations were summarize.

关 键 词：超细玻璃棉 传热 液氮 

分 类 号：TK124[动力工程及工程热物理—工程热物理]