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首页> 外文期刊>Journal of natural gas science and engineering >Droplet flux measurements in two-phase, low liquid loading, horizontal pipe flow using a high-density gas
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Droplet flux measurements in two-phase, low liquid loading, horizontal pipe flow using a high-density gas

机译：两相，低液体负荷，水平管道流动的液滴通量测量，使用高密度气体

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Entrained fraction is one of the essential parameters needed for the prediction of frictional pressure drop and efficient design of downstream facilities. In the literature, there are very few entrained fraction datasets focused on low liquid loading flows, and even less datasets obtained from high pressure systems. This paper provides experimental entrained fraction data for low liquid loading gas-oil flows in a 100-mm diameter horizontal PVC and carbon steel pipe. High-density sulphur hexafluoride (SF6) gas and Exxsol D60 oil are used as the fluid phases to mimic actual field conditions. Superficial gas and oil velocities are varied between 5 m/s to 15 m/s and 1 mm/s to 7 mm/s, respectively. Local drop flux along the vertical diameter of the pipe cross-section is measured using the isokinetic sampling approach. Effects of several parameters such as system pressure (gas density), gas and liquid flow rates, and pipe material on the entrained fraction are studied. As expected, the entrained fraction increases with either the gas density or the gas velocity. The effect of liquid flow rate on the entrainment is not obvious; results show either a constant level or a decrease in entrainment with an increase in liquid flow rate, depending on the gas flow rate. The measurements conducted using two different pipe materials (PVC and carbon steel) demonstrated that surface material can cause significant differences in the entrainment. Therefore, the near-wall film behavior will have considerable influence on the entrainment mechanism, especially when the thickness of the liquid film becomes very thin. Finally, this paper also provides an evaluation of the existing correlations and/or models available in the literature against the acquired entrainment data using the high-density gas test facility.
机译：夹带级分是预测摩擦压降和高效设计所需的基本参数之一。在文献中，夹带的额定馏分数据集聚焦在低液体加载流，甚至从高压系统获得的数据集较少。本文提供了100毫米直径水平PVC和碳钢管中的低液体加载气体流量的实验夹带级分数据。高密度硫六氟（SF6）气体和exxsolD60油用作流体相以模拟实际场条件。浅表气体和油速度分别在5米/秒至15米/秒和1mm / s至7mm / s之间变化。沿管横截面的垂直直径的局部液滴焊剂采用等因速采样方法测量。研究了诸如系统压力（气体密度），气体和液体流速的若干参数的影响，以及夹带部分的管材。如预期的那样，夹带的分数随气体密度或气体速度而增加。液体流速对夹带的影响并不明显;结果表明，根据气体流速，延长液体流速的恒定水平或减少。使用两种不同的管材（PVC和碳钢）进行的测量表明，表面材料会导致夹带中的显着差异。因此，近壁膜行为对夹带机构具有相当大的影响，特别是当液体膜的厚度变得非常薄时。最后，本文还提供了使用高密度气体测试设施对所获得的夹带数据的文献中现有相关性和/或模型的评估。

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