垂直气-液两相管流中的流型转换机制与控制

对大管径气-液两相流动中严重影响压力平衡与机械驱动效率的段塞流生成机制和控制方法进行了研究，实验证明段塞流的形成是由于空隙率波的大幅度增长使气泡高度集中，并形成聚并所致。强湍流运动可以抑制Taylor泡的形成。因此，通过强化湍流或控制扰动频率可以对气泡聚并起明显的抑制作用。

The Transition Mechanism of the Flow Regimes and Its Control of Gas-liquid Two-phase Flow in Vertical Pipes

It is studied that the formation mechanism of Taylor bubble and its control method in gas|liquid two|phase flow,which affects the pressure balance and mechanical driving efficiency in the flow of petroleum engineering.Experiments show that the formation of Taylor bubble in gas|liquid two|phase flow is due to the intensive congregation and amalgamation of small bubbles driven by void fraction waves and that the highly turbulent flow is able to restrain this formation.Thus,the flow regime transition may be checked by increasing the flow turbulence and controlling the disturbed frequency.