颗粒多孔层在真空状态下的沸腾滞后  

BOILING HYSTERESIS FROM THIN PARTICLE POROUS LAERS IN A VACUM STATE

作　　者：童庆明[1] 张洪济[1] 

机构地区：[1]重庆大学热力工程系

出　　处：《工程热物理学报》1995年第4期461-465,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金

摘　　要：以乙醇为工质，实验探索了颗粒多孔层在真空状态下的沸腾滞后现象，以及系统真空度、液体过冷度和多孔层结构参数对它的影响。结果表明，即使采用具有中等浸润的乙醇作为沸腾工质，颗粒多孔层仍然存在严重的起始沸腾滞后，而且随着系统真空度和液体过冷度的增加，滞后的程度加剧。降压诱沸是减弱多空层沸腾滞后的有效措施。The boiling curve hysteresis phenomena from thin particle porous layers in a vacum state are experimentally researched, using Ethyl alcohol as test liquid. The influences of system vacuity, initial subcooling of boiling liquid as well as structure of the porous layer on the hysteresis are explored. The experimental results show that even if a moderately wetting liquid (such ajs Ethyl alcohol) is used as a boiling medium, the particle porous layer still exhibits large-scale boiling curve hysteresis, and the boiling curve hysteresis becomes heavier with the increase of system vacuity and boiling liquid subcooling. Reducing system pressure, inducing boiling incipience, is all effective step to lessen the extent of boiling curve hysteresis.

关 键 词：颗粒多孔层 沸腾滞后 真空状态 换热器 

分 类 号：TK124[动力工程及工程热物理—工程热物理]