Correlation for calculating frictional pressure drops in vertical three-phase flows for subsea-resource production
Correlation for calculating frictional pressure drops in vertical three-phase flows for subsea-resource production
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DOI：
10.1016/j.oceaneng.2023.114121
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发表时间：
2023-05
影响因子：
5
通讯作者：
Satoru Takano;Sotaro Masanobu;S. Kanada;Masao Ono
中科院分区：
文献类型：
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作者：
Satoru Takano;Sotaro Masanobu;S. Kanada;Masao Ono
在日本专属经济区内的深海中发现了海底矿物和甲烷水合物。然而，由于一些技术问题，它们还没有商业化，气升泵是一种很有前途的海底矿物和甲烷水合物从海底输送到海面的技术。然而，由于管道内的流动在气升泵送系统中变成三相流动，因此需要建立计算三相流动中摩擦压降的方法。为了建立这样的方法，我们回顾了现有的计算两相和三相流中的摩擦压降的相关性。接下来，我们进行了实验的气-液两相和气-液-固三相流通过透明聚氯乙烯管使用树脂球作为固体颗粒。随后，我们将计算结果与实验数据进行了比较。我们修改了在三相流比较中表现出良好性能的关联式，并提出了用于计算垂直三相流中摩擦压降的新关联式。将修正后的关联式和新的关联式的计算结果与三相流的实验数据进行了比较，对新的关联式进行了评价，新的关联式可用于计算三相流中的摩擦液滴，相流比其它相关性更精确。此外，新的关联式可以用来计算更广泛的压降比其他的关联式，因为它不包含实验常数。因此，建议的关联式是更准确和有效的计算摩擦压降在垂直的两相和三相流比其他关联。
Subsea minerals and methane hydrate are found in deep seas within the exclusive economic zone of Japan. However, they have not been commercialized owing to some technical issues.Gas-lift pumping is a promising technique for transporting subsea minerals and methane hydrate from the seafloor to the sea surface. Nevertheless, methods for calculating frictional pressure drops in three-phase flows need to be established because internal flows in pipes become three-phase flows in gas-lift pumping systems. To establish such methods, we reviewed existing correlations for calculating frictional pressure drops in two- and three-phase flows. Next, we conducted an experiment on gas–liquid two-phase and gas–liquid–solid three-phase flows through transparent polyvinyl chloride pipes using resin balls as solid particles. Subsequently, we compared the calculated results with the experimental data. We modified the correlations that showed good performance in the comparison for three-phase flows and proposed new correlations for calculating frictional pressure drops in vertical three-phase flows.Further, we compared the calculated results based on the modified and new correlations with the experimental data for a three-phase flow to evaluate the correlations.The new correlation could be used to calculate frictional drops in three-phase flows more accurately than the other correlations. In addition, the new correlation could be used to calculate a wider range of pressure drops than the other correlations because it contains no experimental constant. Thus, the proposed correlation is more accurate and effective for calculating frictional pressure drops in vertical two- and three-phase flows than other correlations.