Abstract: The bypass-pipe method for elimination of severe slugging in a decline-riser test pipe was studied.The inner diameter of the test pipe is 0.051〖KG0〗m.It is found that the bypass-pipe method can eliminate severe slugging completely.Using the bypass-pipe method，the range with severe slugging，especially the SSⅠ，becomes smaller.The SSⅠ and SSⅡ are separated by stable flow.Superficial velocity of liquid has little influence on the elimination effect of bypass-pipe method at a fixed superficial velocity of gas.Bypass-pipe method can decrease the pressure fluctuation of severe slugging and move the maximum amplitude from the boundary between SSⅠ and SSⅡ to SSⅡ.A mathematic model and an equation for the pressure drop of valve are obtained using the pressure balance of bypass-pipe and decline-riser pipe.

摘要： 在内径为0.051 m的下倾管-立管实验系统上对旁通管法消除严重段塞流的效果进行了模拟实验和理论分析。研究发现，旁通管法可以完全消除严重段塞流现象。使用旁通管法后会缩小严重段塞流的发生范围，特别是流型Ⅰ的范围显著缩小，并且稳定流动将流型Ⅰ和流型Ⅱ分开。在一定气相折算流速下，当旁通管完全消除严重段塞流后，改变液相折算流速对旁通管的消除效果没有影响。旁通管法会减弱严重段塞流的压力波动幅度，使压力波动幅度的最大值从流型Ⅰ和流型Ⅱ的边界移动到流型Ⅱ中。根据旁通管和下倾管-立管实验管路的压力平衡，提出了旁通管法消除严重段塞流的稳态数学模型，并给出确定调节阀压降的关系式。