Abstract:

An independent component analysis (ICA) method was applied to extract the flow characteristics and separate the gas/liquid phase information from the data of a gas/liquid flow in horizontal pipe obtained by electrical resistance tomography (ERT).The efficiency of ICA with the ERT data was assessed by experiments.The obtained independent components were interpreted by comparing with the reconstructed images by ERT and the records from camera.For slug flow, stratified flow and wavy flow, the method combining ERT and ICA is effective in extracting the flow characteristics of two-phase flow, and the extracted independent components have explicit physical meaning corresponded to the gas phase and the liquid phase separately.For a plug flow, useful signals from high frequency components are submerged, in which case multi-resolution analysis may need to be combined to obtain more useful information.

摘要：

基于独立成分分析(ICA)方法分析水平管气液两相流的电阻成像（ERT）所获取数据，提取水平管气液两相流流动特征，获取分相信息。通过分析比较ICA所得的独立分量以及ERT侧视、俯视成像时间序列和摄像仪记录的流动状态图像，并经过实验表明，对水平管气液两相流中的弹状流、分层流、波状流，电阻层析成像方法结合ICA方法可有效地获取水平管气液两相流流动特征参数，提取的独立分量反映了物理上相互独立的分相的变化情况，具有明确的物理意义;对水平管气液两相流中的塞状/泡状流，ICA方法结合多尺度分析方法可获得更为有效的信息。