Abstract: This paper makes a systematic study of flooding in vertical tubes with liquid flowing downward and gas flowing upward and defines clearly two types of flooding mechanism of climbing film flooding and liquid bridging flooding. If the velocity of gas is not high enough to cause reverse movement of liquid film, liquid is entrained by gas and forms a liquid slug, i. e., liquid bridge. As the gas stream carries the slug upward, flooding appears. We studied flooding in sharp edged tubes and put forward a semi-theoretical relation. Observation and measurement were done in reflux condensers. The experimental investigation agreed well with the mechanisms mentioned above. An experimental correlation for flooding in tapered tubes was proposed and the flooding mechanism was analyzed briefly. The experiments proved that the flooding velocity could be raised by eliminating entrance disturbance. A new type of tubes with some holes on its ends was developed,

摘要： 本文较系统地研究了垂直管中的液泛现象,从液泛机理出发,明确定义两种不同的液泛——爬膜液泛和架桥液泛。并侧重研究了管子直径、管口几何形状对液泛的影响。提出平切口管,斜切口管的液泛关联式。指出提高液泛速度的途径。通过实验对所提论点及关联式进行了验证。