基于多传感器信息融合的小通道气液两相流参数检测

Currently, the study on gas-liquid two-phase flow in mini-channels is becoming one of the most attractive topics in the research field of multi-phase flow. Unfortunately, conventional measurement methods are difficult to meet the urgent requirements of the academic researches and the engineering applications of gas-liquid two-phase flow in mini-channels. Under the framework of multi-sensor information fusion, this project aims to seek new methods which are suitable for the parameter measurements of gas-liquid two-phase flow in mini-channels. A new compacted electrical sensor will be developed. The flow information of gas-liquid two-phase flow in mini-channels will be obtained by using optical sensors and the developed electrical sensors. Combing data mining technique and machine learning theory, the characteristics of gas-liquid two-phase flow will be analyzed and the parameter measurement models of the gas-liquid two-phase flow in mini-channels will be developed. Finally, the parameter measurements of gas-liquid two-phase flow in mini-channels (flow regime identification, liquid film thickness, void fraction and flow velocity/flowrate) will be implemented. The project will provide effective measurement methods for the parameter measurements of gas-liquid two-phase flow in mini-channels. It has an important academic value and a broad prospect of practical applications.

小通道气液两相流已成为多相流领域研究的热点之一。现有的两相流检测技术难以满足小通道气液两相流研究发展和工程应用的迫切需求。本项目拟在多传感器信息融合的框架下，寻求适用于小通道气液两相流参数检测的新方法。拟研发出适用于小通道的新型一体型电学传感器。拟综合应用电学和光学先进传感技术，获取反映小通道气液两相流流动特性的信息。拟结合数据挖掘和机器学习等技术，进行小通道内两相流流动特性的分析，建立小通道气液两相流参数测量模型。最终，实现小通道气液两相流流型辨识，液膜厚度、相含率和流速/流量等关键参数的测量。本项目的研究工作将为小通道气液两相流参数测量提供有效的测量方法，具有重要的学术价值和广阔的实际应用前景。

本项目在多传感器信息融合的框架下，针对小通道气液两相流的特点，分别设计了新型光学阵列传感器、轴向和径向两种电极结构的电容耦合非接触式电导测量（Capacitively Coupled Contactless Conductivity Detection，简称C4D）传感器；开发了光学参数检测系统、基于C4D传感器的参数检测系统、基于PVT原理的参数检测系统以及多视觉参数检测系统；结合数据挖掘和机器学习等技术，对获取的光学、电学、差压和图像信息进行了深入分析，分别建立了小通道气液两相流流型辨识模型、相含率测量模型、流速/流量测量模型和液膜厚度测量模型，实现了相应参数的检测；进行了流型和相含率多传感器信息融合模型的研究工作，提高了系统辨识精度和测量的可靠性；拓展研究了C4D电学传感器在小通道沸腾传热监测中的应用，提出了一种小通道沸腾传热在线监测新方法。实验研究结果表明所提出的检测方法和系统是有效的。本项目资助下，已在Measurement Science and Technology，AIChE Journal，Review of Scientific Instruments，Pattern Recognition Letters，Particuology，Sensors等国际著名期刊发表SCI收录论文7篇，他引27次，EI收录论文7篇，获得授权发明专利7项。本项目的研究为小通道气液两相流参数测量提供了有效的手段，具有重要的学术价值和广阔的应用前景。