窄空间流道内两相流动压降及流量波动特性的实验研究  

Visual Experimental Investigation on Oscillations of Pressure Drop and Flow Rate of Two-Phase Flow in Mini-Channel

作　　者：陈德奇[1] 王庆华[1] 陆祺[1] 潘良明[1] 

机构地区：[1]重庆大学低品位能源利用技术及系统重点实验室,重庆400044

出　　处：《核动力工程》2015年第5期187-193,共7页Nuclear Power Engineering

基　　金：国家自然科学基金(No.51206199);中国博士后科学基金资助项目(No.2014M562337)

摘　　要：窄小流道内的两相流动压降不同于常规流道,在窄小空间内的受限气泡行为对流动稳定性有着重要影响。本文在1个标准大气压(0.101 MPa)下,对内径为2 mm的窄小流道内气-液两相流动进行可视化实验研究。实验在不同工况参数和气相工质下展开,其中气相工质包括氮气、空气、二氧化碳和氩气,液相工质为水。研究发现,在给定气相体积流量下,压降随液体质量流速增大而增加,对应的气-液界面形态均为拉长型气弹;而在给定液相质量流速下,压降随气相体积流量增加不成线性关系,是先减小后增大,对应的气-液界面形态仍为拉长型气弹。The pressure drop in the narrow space channel is different from that in the regular size channel, and the bubble behavior in confined narrow space has great influence on the flow stability. A visual investigation on the gas-liquid two-phase flow was carried out in a narrow space channel with 2 mm in diameter under atmospheric pressure （0.101 MPa）. Experiments were carried out with different working conditions and gas-phase working fluids, including air, carbon dioxide and argon. It is found that the pressure drop increases along with the increasing of liquid mass flux and constant gas flow rate, and the corresponding interface morphology is elongated slug flow. However, the pressure drop decreases at first and then increases along with the gas flow rate with constant liquid mass flux, and the corresponding interface morphology is still elongated slug flow.

关 键 词：窄小空间流道 两相流 压降波动 流量波动 

分 类 号：TG172[金属学及工艺—金属表面处理]