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Pressure drop, flow pattern and hold-up measurements of gas-liquid flow in pipes

机译：管道中气液流量的压降，流量模式和滞留量测量

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This paper presents detailed measurements on gas-liquid flows in horizontal and slightly inclined pipes. The mixture velocities, liquid fractions and pipe inclinations used in the experiments are in a range that is commonly used in transportation of unprocessed gas in offshore oil and gas industry. The experimental activities were performed using the multiphase flow loop at Telemark University College, Porsgrunn, Norway. The experiments were conducted in a 15 m long, 56 mm diameter, inclinable steel pipe using Exxsol D60 oil (density 793 kg/m3 and viscosity 1.3 mPas), water (density 999 kg/m3 and viscosity 0.89 mPas) and air (density 1.22 kg/m3 and viscosity 0.018 mPas) as test fluids. Mixture velocities of 5, 10 and 15 m/s, liquid fractions of 0.0010, 0.0025, 0.0050, 0.0075 and 0.0100 and pipe inclinations of-5°, -1°, 0, +1° and +5° from horizontal were investigated. The time-averaged cross-sectional distributions of gas and liquid phases were measured using a single-beam gamma densitometer. The characterization of flow patterns and identification of their boundaries were performed using high-speed videos, still pictures and live observations. Seven different flow patterns were identified for gas liquid flow in horizontal and slightly inclined pipes. The pressure drop and liquid hold-up measurements were also reported.
机译：本文介绍了水平和微倾斜管道中气液流动的详细测量方法。实验中使用的混合速度，液体馏分和管道倾斜度均在海上石油和天然气工业中未处理气体的运输中普遍使用的范围内。实验活动是使用位于挪威Porsgrunn的Telemark大学学院的多相流回路进行的。实验是在15 m长，直径56 mm的可倾斜钢管上进行的，使用的是Exxsol D60油（密度793 kg / m3和粘度1.3 mPas），水（密度999 kg / m3和粘度0.89 mPas）和空气（密度1.22） kg / m3，粘度为0.018 mPas）作为测试流体。研究了5、10和15 m / s的混合速度，0.0010、0.0025、0.0050、0.0075和0.0100的液体分数以及与水平方向成5°，-1°，0，+ 1°和+ 5°的管道倾斜度。使用单光束伽马密度计测量气相和液相的时间平均截面分布。使用高速视频，静态图片和实时观察对流型进行表征并确定其边界。对于水平和微倾斜管道中的气液流动，确定了七个不同的流型。还报告了压降和液体滞留量的测量。

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