Multiphase flow rate metering is a challenging problem, specially for flow patterns other than wet-gas. This paper brings forward a new comparative analysis of three differential pressure calibration models suited for liquid dominated two-phase flows, in a total of seven model configurations. First, the models are compared theoretically and classified in terms of the type of input data required. Then, experimental data of over 300 horizontal air–water experiments, for $1$” and $2$” pipe diameters, supports quantitative analyses of the prediction accuracies and sensitivity of the superficial velocities of gas and liquid to measurement errors in the model input variables. Finally, a method for assessing the decoupled measurement errors for the void fraction and gas velocity is shown, as these variables are typically subject to higher uncertainties. It results that, though the void fraction is shown to be systematically under evaluated in more than 10%, the total mass flow rate is estimated through the Paz et al. (2010) model with an overall root mean squared deviation (RMSD) of 5.75% for the $2$” data. Also, the use of gas velocity measurements, even if subject to considerable errors, decreased the RMSD for the gas superficial velocity by more than half for the $1$” data.

多相流量计量是一个具有挑战性的问题，特别是对于湿气以外的流动模式。本文提出了适用于液体主导的两相流的三种压差校准模型的新比较分析，共有七种模型配置。首先，从理论上比较模型并根据所需输入数据的类型进行分类。然后，超过 300 次水平空气-水实验的实验数据，对于$1$“ 和 $2$”管径，支持定量分析气体和液体的表观速度对模型输入变量中的测量误差的预测精度和敏感性。最后，展示了一种评估空隙率和气体速度的解耦测量误差的方法，因为这些变量通常具有较高的不确定性。结果表明，虽然孔隙率被系统地低估了 10% 以上，但总质量流量是通过 Paz 等人估计的。(2010) 模型的总体均方根偏差 (RMSD) 为 5.75%$2$“ 数据。此外，即使存在相当大的误差，使用气体速度测量也会将气体表观速度的 RMSD 降低一半以上。$1$“ 数据。