文档介绍：低温与超导制冷技术 Cryo. & Supercond.
第 36卷
第 10期 R efrigeration V 36
N o. 10
超临界流体传热综述
黄禹, 沈飚, 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: 超临界流体是温度和压力均高于临界点的流体, 在临界点附近物体的粘性、密度、比热以及其它一些性
质变化非常剧烈, 处于超临界状态时物质的气液两相性质非常接近, 这种特殊的物性使得超临界流体在诸多领域
有着非常广泛的应用。总结了以前国内外学者对于超临界流体传热的研究, 主要集中于 CO2 和水的实验研究, 由
众多实验表明换热恶化容易发生在赝临界点附近、高热流密度、低质量流量和向上流动的情况下, 换热系数的峰值
也出现在赝临界点附近, 并随压力和温度的变化会有所改变。还对提出的一系列关联式进行比较和分析。
关键词: 超临界; 换热; 赝临界点; 换热恶化; 浮升力
The review of heat transfer of supercritical fluid
Huang Y u, Shen B iao, Zhang Peng, W ang Ruzhu
( Institute o f R efrigeration and C ryogen ics, Shanghai J iaotong U n iversity, Shangha i 200240, Ch ina)
Abstrac t: C lose to the liqu id- vapor c ritica l po in t, flu id behav ior exhib its anom a lous characteristics: the iso therma -
pressib ility and the vo lum e tric the rm al expansion coeffic ient tend to infin ity, whereas the d iffus ive coeffic ients go to ze ro. T he re-
su ltant fast adiabatic the rm al relaxation en tails a large fie ld of resea rch on the critica l dynam ics in hea t transfer and flu id convec-
tion. In this rev iew we presen ted an ove rv iew of the prog ress in experim enta l research on hea t transfer process in near- critica l
w ater and CO2. The experimenta l resu lts strong ly sugg est that deterioration of hea t transfer tends to occur a long the pseudocritica l
line in upw ard flows in vertica l t