This paper describes an experimental and theoretical research on the two-phase flow pattern transition of downflow in vertical helical coils in an air-water loop.

本文对低压水-空气两相流动在立式螺旋管内向下流动的流型及其转变特性进行了实验和理论研究。

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This turbulence caused the flow pattern in the tunnel to be similar to the flow pattern in free air at a higher Reynolds number.

这种紊流使风洞内的流谱与在较高的雷诺数下自由气流中的流谱相似。

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Based on the flow pattern of the air water mixture, a pressure drop model of air water system has been presented, and the results of this model agree well with the results of the experiments.

根据混合后气液两相混合物的流动流型，模拟计算空气—水系统的压降，计算结果与实验结果较为吻合。

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