低温回路热管吸液芯渗透率测试及分析  

PERMEABILITY MEASUREMENT AND ANALYSIS FOR THE POROUS WICK IN CRYOGENIC LOOP HEAT PIPE

作　　者：赵雅楠[1,2] 闫涛[1] 梁惊涛[1] 

机构地区：[1]中国科学院理化技术研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《工程热物理学报》2010年第7期1093-1096,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50676098)

摘　　要：低温回路热管的吸液芯是由不锈钢粉末烧结成的多孔结构,为低温工质的循环流动提供动力。渗透率是吸液芯重要的性能参数,决定液体径向流过吸液芯时的压降。本文介绍了以达西定律为理论依据的测量渗透率实验系统,采用无水乙醇作为工质在室温下进行实验,用高压氮气对液体施压,推动液体加速流动,改变驱动压力得到不同的质量流量来分析计算渗透率。本文分析了在层流范围内驱动压力与渗透率的关系,最终获得比较准确的渗透率数值。The porous wick in a cryogenic loop heat pipe is a porous structure sintered by stainless steel powder which provides impetus for the working fluid circulation. Permeability is an important parameter of the porous wick and affects the pressure drop of the working fluid flowing through the porous wick. This article presents an experimental system for measuring permeability based on Darcy＇s law. The experiments are performed at room temperature with ethanol as the working fluid, while high-pressure N2 equipment is used to press on the working fluid and accelerate the fluid flow. A series of data of mass flow under different pressure are obtained in the experiment from which the permeability could be figured out. The article analyzes the relationship between driving pressure and permeability in the laminar flow region and gets a reliable permeability value.

关 键 词：低温回路热管 吸液芯 渗透率 

分 类 号：TK123[动力工程及工程热物理—工程热物理]