Identification of gas-liquid two-phase flow regime in pipelines with low liquid holdup based on ResNet1D-34.

Flow pattern identification is an important topic in multiphase flow research. To overcome the subjectivity of manual identification, intelligent identification of flow patterns has attracted much attention in recent years. Both traditional machine learning methods and deep learning methods have been utilized in this field. However, traditional machine learning methods lack accuracy, and existing deep learning methods mostly rely on artificial feature extraction or complex preprocessing. In this paper, we propose a new method with high accuracy and low preprocessing dependency to solve these issues. We modify ResNet, which has proven high performance in computer vision, to fit the data collected by the wire-mesh sensor system (WMS). Due to its outstanding feature extraction ability, the new model can reach high accuracy with simple normalization as the preprocessing step. Additionally, the model can directly process data at various scales without retraining or rebuilding, which gives it high usability and economic value. The experimental results show that the accuracy of this method can reach 99.58% on our dataset. • A wire-mesh sensor system is applied to flow pattern recognition for the first time. • The method reaches a high accuracy without complex preprocessing. • Neural network models are compatible with data scales. • The influence of the data scale on the recognition effect is analyzed. [ABSTRACT FROM AUTHOR]