At present, there are relatively few studies on the slug flow generation mode obtained by exchanging gas-liquid two-phase inlets. In this study, an experimental system combining microfluidic devices and high-speed cameras was used to study the effects of gas-liquid two-phase flow rate, liquid physical parameters, etc., On the characteristic length, generation period and other generation characteristics of slug flow, and dimensionless analysis was conducted to investigate the main factors affecting the characteristic length of gas slug. Results show that 1) when the gas flow rate affects the aeroelastic generation characteristics, the aeroelastic characteristic length increases from 443 μm when the gas flow rate increases changes to 657 μm. The generation period decreases rapidly at first and then the change amplitude slows down. The maximum value of aeroelastic generation frequency is 217 s-1; 2) when studying the effect of different liquid flow rates, increasing the liquid flow rate, the characteristic length of the gas bomb gradually decreases, and the generation period of the gas bomb gradually increases. Aeroelastic characteristic length from 770 μm changes to 378 μm. The range of aeroelastic generation cycle is 4–13.4 ms, and the maximum value of aeroelastic generation frequency is 250 s-1; 3) there is a functional relationship between the ratio of aeroelastic characteristic length to channel size L/d and dimensionless gas-liquid flow ratio Q*, Reynolds number Re, Weber number We: L/d=3.677Q*0.58/Re0.11.

中文翻译：

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微通道内气液两相物性对段状流影响的研究

目前，关于交换气液两相入口获得的团状流产生方式的研究相对较少。本研究采用微流控装置与高速相机相结合的实验系统，研究了气液两相流速、液体物理参数、ETC。,对团状流的特征长度、生成周期等生成特征进行了无量纲分析,探讨了影响气团状流特征长度的主要因素。结果表明：1）当气体流量影响气弹产生特性时，气弹特征长度由气体流量增加时的443 μm增加到657 μm。生成周期先迅速减小，然后变化幅度变缓。气动弹性产生频率最大值为217 s-1; 2）在研究不同液体流量的影响时，增加液体流量，气弹的特征长度逐渐减小，气弹的产生周期逐渐增加。气动弹性特征长度从 770 μm 变为 378 μm。气弹产生周期范围为4~13.4 ms，气弹产生频率最大值为250 s-1; 3)气动弹性特征长度与通道尺寸之比L/d与无量纲气液流量比Q之间存在函数关系*, 雷诺数 Re, 韦伯数 We:大号/d=3.677问*0.58/关于0.11.