On the basis of a quick-closing valve technology, parallel-wire conductivity probes were designed to measure water hold-up of oil-water two-phase flow in near-horizontal pipe. First, the electric-field distribution characteristics of the parallel-wire conductivity probe and its response to the change of the water layer height were calculated by using finite-element method. Then, for the oil-water stratified distribution in the near-horizontal pipe with a 5° inclined angle, 20 mm inner diameter, and 1050 mm length, a measurement model for water hold-up was established. After that, a static experiment was carried out to investigate the accuracy of water-hold-up measurement. The results show that errors occur when the set water hold-up is with high values. The measurement errors were analysed based on curved oil-water interface predicted by Young-Laplace equation model, which are significantly related to the curvature of oil-water interface. It provides an effective experimental method for the measurement of water hold-up in a near-horizontal oil-water two-phase flow pipes. On the basis of this, the dynamic experiment of oil-water two-phase flow was carried out, and the slippage of oil-water two-phase flow was preliminarily revealed.

中文翻译：

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基于平行导线电导率探针的近水平油水两相流水管持水率测量方法

在快速关闭阀技术的基础上，设计了平行导线电导率探头，以测量近水平管道中油水两相流的持水率。首先，采用有限元法计算了平行线电导率探针的电场分布特性及其对水层高度变化的响应。然后，对于倾斜角为5°，内径为20 mm，长度为1050 mm的近水平管道中的油水分层分布，建立了持水率测量模型。之后，进行了静态实验以研究持水率测量的准确性。结果表明，当设定持水率较高时，会发生错误。基于Young-Laplace方程模型预测的弯曲油水界面，分析了测量误差，该误差与油水界面的曲率显着相关。它为测量近水平油水两相流管道中的持水率提供了一种有效的实验方法。在此基础上，进行了油水两相流的动力实验，初步揭示了油水两相流的滑移。