文档介绍：低温与超导低温技术 Cryo. & Supercond.
第 35卷第 4期 C ryogen ics V o .l 35 N o. 4
毛细多孔介质在液氮中的传热试验研究
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
( 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)
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。
关键词: 超细玻璃棉; 传热; 液氮
A n exper imental study of heat transfer character istics of capillary porous media in liquid nitrogen
Chen Shuping1, L iHu iy an1, Chen G uangq i2, W en Y ongg ang2, Sun L in ing1, Su H a ilin1, W ang Gu iren1
( 1. L anzhou U n iv ers ity o f T echno logy, L anzhou 730050, Ch ina; 2. L anzhou Institute o f Physics, Lanzhou 730000, Ch ina)
Abstrac t: The hea t transfe r characteristics o f cap illary porousm edia in liqu id nitrogen we re studied. F ive temperature curves were pres-
ented through essiv e tem pera ture m easuring w ith cryogen ic thermo coup les a t five d iffe rent positions of a experim ental ob ject. The ana lysis
o f the temperature curves show ed that superthin g lass cotton can enhance heat transfer to large extent in the experim ent and m ake the exper-i
m enta l ob jectm a inta in a re lative ly steady low tem pera ture for a wh ile. A nd the hea t transfer process was analyzed theoretica lly and the appl-i
cable hea t transfer equations w ere summ arized.
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