We propose a novel flow measurement method for gas–liquid two-phase slug flow by using the blind source separation technique. The flow measurement model is established based on the fluctuation characteristics of diff...We propose a novel flow measurement method for gas–liquid two-phase slug flow by using the blind source separation technique. The flow measurement model is established based on the fluctuation characteristics of differential pressure(DP) signals measured from a Venturi meter. It is demonstrated that DP signals of two-phase flow are a linear mixture of DP signals of single phase fluids. The measurement model is a combination of throttle relationship and blind source separation model. In addition, we estimate the mixture matrix using the independent component analysis(ICA) technique. The mixture matrix could be described using the variances of two DP signals acquired from two Venturi meters. The validity of the proposed model was tested in the gas–liquid twophase flow loop facility. Experimental results showed that for most slug flow the relative error is within 10%.We also find that the mixture matrix is beneficial to investigate the flow mechanism of gas–liquid two-phase flow.展开更多
The development of differential electrochemical mass spectrometry (DEMS) originated in the late 20th century[1–4],with its core objective being the integration of electrochemical processes with mass spectrometric det...The development of differential electrochemical mass spectrometry (DEMS) originated in the late 20th century[1–4],with its core objective being the integration of electrochemical processes with mass spectrometric detection to enable real-time tracking of reaction intermediates and products at the electrodes [5,6].DEMS was initially employed to study electrochemical processes in aqueous solutions,such as methanol oxidation [7].Recently,with the rapid development of new energy technologies,DEMS has been widely applied in the research and development of electrocatalysis,lithium-ion,sodium-ion,and metal-air batteries[8–16].展开更多
基金Supported by the National Natural Science Foundation of China(51304231)the Natural Science Foundation of Shandong Province(ZR2010EQ015)
文摘We propose a novel flow measurement method for gas–liquid two-phase slug flow by using the blind source separation technique. The flow measurement model is established based on the fluctuation characteristics of differential pressure(DP) signals measured from a Venturi meter. It is demonstrated that DP signals of two-phase flow are a linear mixture of DP signals of single phase fluids. The measurement model is a combination of throttle relationship and blind source separation model. In addition, we estimate the mixture matrix using the independent component analysis(ICA) technique. The mixture matrix could be described using the variances of two DP signals acquired from two Venturi meters. The validity of the proposed model was tested in the gas–liquid twophase flow loop facility. Experimental results showed that for most slug flow the relative error is within 10%.We also find that the mixture matrix is beneficial to investigate the flow mechanism of gas–liquid two-phase flow.
基金supported by the Jiangsu Province Carbon Peak and Neutrality Innovation Program (Industry Tackling on Prospect and Key Technology)(BE2022031-4,BE2022002-3)the National Natural Science Foundation of China (52173173,22572087)the State Key Laboratory of Materials-Oriented Chemical Engineering (SKL-MCE-24A16)。
文摘The development of differential electrochemical mass spectrometry (DEMS) originated in the late 20th century[1–4],with its core objective being the integration of electrochemical processes with mass spectrometric detection to enable real-time tracking of reaction intermediates and products at the electrodes [5,6].DEMS was initially employed to study electrochemical processes in aqueous solutions,such as methanol oxidation [7].Recently,with the rapid development of new energy technologies,DEMS has been widely applied in the research and development of electrocatalysis,lithium-ion,sodium-ion,and metal-air batteries[8–16].
