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根据严重段塞流4个阶段的特点,针对L形立管系统不稳定流建立了一维准平衡态简化计算模型,其忽略摩阻和加速度的影响,立管中气相穿透过程应用漂移流模型。气相穿透、气液喷发阶段采用特征线方法求解,并引入气相密度偏移修正过程,能够对典型严重段塞流和液塞长度小于立管高度的过渡严重段塞流进行模拟。将模型计算结果与实验室结果以及其他文献的实验数据进行对比,结果表明模型能够对L形立管系统中的两相不稳定流动进行较准确的模拟。(图2,表3,参16)。
According to the characteristics of four stages of severe slug flow, a simplified one-dimensional quasi-equilibrium model is established for the unsteady flow of L-shaped riser system, ignoring the influence of friction and acceleration. In the riser, model. The gas-phase breakthrough and the gas-liquid eruption phase were solved by the characteristic line method, and the process of gas phase density offset correction was introduced to simulate the severe slugging slump of typical severe slug flow and liquid slug length less than the riser height. Comparing the results of model calculation with those of laboratory and other literatures, the results show that the model can simulate the two-phase unsteady flow in L-shaped riser system more accurately. (Figure 2, Table 3, reference 16).