文档介绍：低温与超导低温技术 Cryo. & Supercon.
第 34卷
第 6期 C ryogen ics V o .l 34
N o. 6
液氮流动沸腾换热研究综述
齐守良, 张鹏, 王如竹
(上海交通大学制冷与低温工程研究所, 上海 200240)
摘要: 作为一种优良的低温冷却剂, 液氮在航天、电子工业、超导磁体和超导电缆冷却及低温生物医疗等领域应
用广泛。在这些应用中, 准确预测液氮的流动沸腾换热特性对于系统设计和安全运行十分重要。该文主要介绍了液
氮流动沸腾换热的特点, 对已有的实验和数值模拟结果进行了归纳; 并比较了四个液氮流动沸腾换热计算关联式的
预测情况, 以及关联式中干度、质量流量、热流密度和压力对换热系数的影响; 指出了有待进一步研究的课题。
关键词: 液氮; 流动沸腾; 传热
R eview of liquid nitrogen flow boiling heat transfer
Q i Shouliang, Zhang P eng, W ang R uzhu
( Institute o f R efrige ration and C ryogenics, Shangha i Jiao T ong U niversity, Shanghai 200240, China)
Abstrac t: A s a k ind of exce llen t cryogen, liquid nitrogen has been w ide ly used in many fie lds, such as the aerospace, electronic eng-i
neering, coo ling of supe rconducting m and superconducting pow er cable, cryo- m ed ic ine, e tc. In these app lica tions, it is very cruc ia l
to predict the flow bo iling heat transfer coeffic ient of liquid nitrogen for the system design and sa fe opera tion. In th is artic le, som e cha racte r-
istics o f liqu id n itrog en flow bo iling different from those fo r the o rdina ry flu ids are introduced, and the related expe rim en tal and num erica l re-
su lts are rev iew ed. Four heat transfer correlations for liqu id n itrogen flow bo iling are eva pa ratively. T he effec ts o f qua lity, m ass
flux, heat flux and pressure on the flow bo iling hea t tran