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针对海洋立管的严重段塞流现象,在等温条件下,采用特征线法,根据下倾管和立管中的气液相连续性方程和动量守恒方程,以及严重段塞流的4个不同阶段的特点,考虑气相的压缩性,分别建立了4个阶段相应的瞬态流动模型,进而得到了准平衡态的一维立管系统严重段塞流物理模型。将模型计算结果和立管试验数据进行对比,结果表明:计算得到的段塞周期和立管底部压力等特征参数与试验数据吻合较好。
In view of the serious slugging phenomenon of marine riser, the characteristic line method is used under isothermal conditions. According to the continuity equations of gas and liquid and the equations of momentum conservation in downdraft and riser, and the four different slug flows Phase characteristics of the gas phase, considering the gas compressibility, a corresponding transient flow model was established in four stages respectively, and then a serious slug flow physical model of one-dimensional riser system was obtained. The results of the model and stand pipe test data are compared. The results show that the calculated characteristic parameters such as slug period and riser bottom pressure are in good agreement with the experimental data.