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以空气、去离子水为实验工质,采用130°Y型混合器,在当量直径177.8 μm的蛇形通道内利用高速摄像仪进行可视化实验,比较了上气下液型、上液下气型2种混合方式下的两相流型,并进一步对其产生的原因进行了分析.发现蛇形通道内存在有不同于直微通道的特殊流型,气戟长度在流动过程中有增大的趋势,通道上、中、下3段以及弯道处的相分布与流型有着密切的关系.“,”A visualization experiment is conducted to investigate the gas-liquid two-phase flow patterns in serpentine microchannel by a high speed camera.The test section with the Y-junction of 130,has a smaller curvature and a rectangular cross-section with the width of 0.8 mm and the height of 0.1 mm.Air and deionized water are used as working fluids and injected into channels through the two inlets in a different order,respectively.Flow regimes based on two contrary mixed schemes are compared one by one.The causes for emergence are further analyzed.There are some special flow patterns observed,which are distinguished from those in straight microchannel.The length of gas halberd is tended to increase in the flow process.Furthermore,gas and liquid phase distribution located in the upper,middle or lower sections are closely related to flow conditions.