液体CO_2在毛细管内的质量流量及临界流实验研究  

EXPERIMENTAL STUDU ON THE MASS FLUX & CRITICAL FLUX CHARACTERISTIC OF LIQUID CARBON DIOXIDE IN A CAPILLARY

作　　者：严嘉[1] 童明伟[1] 

机构地区：[1]重庆大学动力工程学院,重庆400044

出　　处：《工程热物理学报》2005年第z1期207-209,共3页Journal of Engineering Thermophysics

基　　金：重庆市科技攻关项目(No.20025567)

摘　　要：本文进行了液体CO2在长度为0.5-5.9m,内径为0.7mm和2.0mm,入出口压差为2.2MPa和2.5MPa的毛细管内的质量流量及临界流的实验研究。实验结果表明液体CO2在毛细管中的质量流量随毛细管内径、入出口压差的增大而增大,随长度的增加而逐渐减小;结果同时表明液体CO2在毛细管中产生了临界流现象,临界流随毛细管内径的增大而增大。在实验基础上回归出了适用于本实验条件的液体CO2在毛细管内的质量流量经验关联式,具有一定的工程指导意义。This article processed experimental studies on the characteristic of mass flux and critical flux of liquid carbon dioxide in capillaries, which are lengths of 0.5 - 5.9 m, inner diameters of 0.7 mm & 2.0 mm, and pressure drops from inlet to outlet of 2.2 MPa & 2.5 MPa. The result of the studies showed that, the mass flux of liquid carbon dioxide increased when inner diameters and pressure drops increased, while it decreased when lengths of capillaries increased; at the same time showed that it occurred critical flux which increased as inner diameters increased. Lastly, it has been regressed experiential expression of liquid carbon dioxide's mass flux characteristic in a capillary, to some extent it has a value of engineering field.

关 键 词：热工学 液体CO2 毛细管 质量流量 临界流 

分 类 号：TK124[动力工程及工程热物理—工程热物理]