Voidage measurement of gas–liquid two-phase flow based on Capacitively Coupled Contactless Conductivity Detection |
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| Affiliation: | 1. School of Computer and Information, Hefei University of Technology, Hefei, China;2. School of Electronic and Information Engineering, Xi?an Jiaotong University, Xi?an, China;3. Computer teaching and research section, Army Officer Academy of PLA, Hefei, China;1. CEA-Saclay, DEN/DM2S/SEMT/LISN, 91191 Gif sur Yvette, France;2. CEA-Sacaly, DEN/DMN/SRMA/LC2M, 91191 Gif sur Yvette, France;3. CEA-Cadarache, DEN/DER/SESI/LE2S, 13108 Saint Paul-Lez-Durance, France;4. AREVA NP, Mechanical Engineering Department, PEELS-F, 10 rue Juliette Récamier, 69456 Lyon Cedex, France;1. The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia;2. Philips Health Tech, Andover, Massachusetts;3. Echocardiography Laboratory of the Massachusetts General Hospital, Boston, Massachusetts;1. DIBRIS, Università degli Studi di Genova, Via Opera Pia 13 16145, Genoa, Italy;2. iCub Facility, Istituto Italiano di Tecnologia, Via Morego 30 16163, Genoa, Italy |
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| Abstract: | Based on Capacitively Coupled Contactless Conductivity Detection (C4D) technique, a new method for the voidage measurement of conductive gas–liquid two-phase flow is proposed. 15 Conductance signals, which reflect voidage distribution of gas–liquid two-phase flow, are obtained by a six-electrode C4D sensor. With the conductance signals, the flow pattern of gas–liquid two-phase flow is identified by flow pattern classifiers and then the voidage measurement is implemented by a corresponding voidage measurement model (for each typical flow pattern, a corresponding voidage measurement model is developed). The conductance measurement of the six-electrode C4D sensor is implemented by phase sensitivity demodulation (PSD) method. The flow pattern classifiers and the voidage measurement models are developed by partial least squares (PLS) technique and least squares support vector machine (LS-SVM) technique. Static voidage measurement experiments and dynamic voidage measurement experiments show that the proposed voidage measurement method is effective, the developed six-electrode C4D sensor is successful and the measurement accuracy is satisfactory. |
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| Keywords: | Capacitively Coupled Contactless Conductivity Detection Voidage measurement Gas–liquid two-phase flow Least squares support vector machine |
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