Y型组合式微通道多相流流动形态实验研究  

Experimental Study on Y-type Microchannel Multiphase Flow Pattern

作　　者：邱思聪 孙旭光 叶辉[1] 孙晓策 QIU Si-cong;SUN Xu-guang;YE Hui;SUN Xiao-ce(China North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]中国北方车辆研究所总体技术部,北京100072

出　　处：《科学技术与工程》2022年第36期15889-15895,共7页Science Technology and Engineering

基　　金：装备预先研究项目(301051201)。

摘　　要：微通道设备具有高效的传热、传质能力,有利于实现气液多相流的有效混合,从而提高工业应用生产效率。但对于工业应用中,形状不规则的微通道的气液两相流流动形态研究一直是微通道研究的难点。基于优化过的Y型组合式微通道结构,进行了复杂微通道内部全流场流动显示实验,实现了对微通道内部不同流量下的气液多相流流动形态的综合测量,获取了基于高速摄像的微通道内部气液两相流分布,对Y型组合式微通道内部流型进行判别,并对气液两相间流动规律进行了数值模拟,提取了沿流道方向的压力分布。以时均特征面积为指标评判不同流型下的时均气液高效混合区域面积。结果表明:气液多相流流型会显著影响气液多相流混合剧烈程度,促进了气液两相流混合效果,增大了气液接触面积。The microchannel equipment has efficient heat and mass transfer capabilities,which is conducive to the effective mixing of gas-liquid multiphase flow,thus improving the production efficiency of industrial applications.However,for industrial applications,the study of gas-liquid two-phase flow patterns in microchannels with irregular shapes has always been a difficult point.Based on the optimized Y-shaped composite microchannel structure,the flow visualization experiment of the full flow field in the complex microchannel was carried out,which realized the comprehensive measurement of the gas-liquid multiphase flow pattern under different flow rates in the microchannel,obtained the gas-liquid two-phase flow distribution in the microchannel based on high-speed photography,judged the internal flow pattern in the Y-shaped composite microchannel,and conducted numerical simulation of the gas-liquid two-phase flow pattern.The pressure distribution along the flow path was extracted.Time averaged characteristic area was used to evaluate the area of high efficient gas-liquid mixing region under different flow patterns.The numerical simulation results show that the flow pattern of gas-liquid multiphase flow significantly affects the mixing intensity of gas-liquid multiphase flow,promotes the mixing effect of gas-liquid two-phase flow,and increases the gas-liquid contact area.

关 键 词：流体力学 微通道 多相流 数值模拟 

分 类 号：O352[理学—流体力学]