The liquid in the pipeline under certain conditions and partially vaporizes into gas state, bubble, formation of gas-liquid two-phase flow which is the process of flash.
管道中的液体在一定的条件下，部分液体气化成气体状态，产生气泡，形成气液两相流这就是闪蒸过程。
Two-phase flow widely exists in processes such as power, chemical, petrol, metallurgy, pipeline transport, medical and refrigeration industries.
两相流广泛存在于动力、化工、石油、冶金、管道运输、医药、制冷等领域。
Therefore, it plays an very important role to study two-phase flow in the pipeline and its safety.
因此及时研究两相流管道的积液情况及其安全性，具有非常重要的作用。
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