Refined reconstruction of liquid–gas interface structures for stratified two-phase flow using wire-mesh sensor |
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| Affiliation: | 1. Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Germany;2. McDougall School of Petroleum Engineering, The University of Tulsa, Tulsa, OK, USA;3. Department of Mechanical Engineering, The University of Tulsa, Tulsa, OK, USA;4. AREVA Endowed Chair of Imaging Techniques in Energy and Process Engineering, Technische Universität Dresden, Germany;1. Process Tomography and Instrumentation Engineering Research Group (PROTOM-i), Infocomm Research Alliance, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;2. Faculty of Science and Technology, Universiti Sains Islam Malaysia, 71800 Bandar Baru Nilai, Negeri Sembilan, Malaysia;3. Tomography Imaging Research Group, School of Mechatronic Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia;4. Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Batu Pahat, Johor, Malaysia;5. Sondotech Sdn. Bhd, 31, Jalan Mutiara Emas 5/1, Taman Mount Austin, 81100 Johor, Malaysia;1. University of Leeds, Leeds LS2 9JT, UK;2. Schlumberger Gould Research, Cambridge CB3 0EL, UK;3. Industrial Tomography Systems plc, Manchester M3 3JZ, UK;1. Sate Key Laboratory of O&G Reservoir Geology and Exploitation, Southwest Petroleum University, China;2. School of Process and Chemical Engineering, University of Leeds, LS2 9JT, UK;1. Department of Petroleum Engineering, University of Stavanger, Norway;2. Department of Electrical, Information Technology and Cybernetics, University College of Southeast Norway, Norway;1. Department of Mechatronic and Robotic, Faculty of Electrical & Electronics Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat, Johor 86400, Malaysia;2. Process Tomography and Instrumentation Research Group, Infocomm Research Alliance, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, Skudai 81310, Malaysia;3. School of Mechatronic Engineering, Universiti Malaysia Perlis, Pauh Putra Campus, 02600 Pauh, Perlis, Malaysia;4. Department of Computer Engineering, Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat, Johor 86400, Malaysia;5. Department of Manufacturing and Industrial, Faculty of Mechanical and Manufacturing Universiti Tun Hussein Onn Malaysia, Parit Raja, Batu Pahat, Johor 86400, Malaysia |
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| Abstract: | Wire-mesh sensors (WMS), developed at HZDR 4], 13], are widely used to visualize two-phase flows and measure flow parameters, such as phase fraction distributions or gas phase velocities quantitatively and with a very high temporal resolution. They have been extensively applied to a wide range of two-phase gas–liquid flow problems with conducting and non-conducting liquids. However, for very low liquid loadings, the state of the art data analysis algorithms for WMS data suffer from the comparably low spatial resolution of measurements and from boundary effects, caused by e.g. flange rings – especially in the case of capacitance type WMS. In the recent past, diverse studies have been performed on two-phase liquid–gas stratified flow with low liquid loading conditions in horizontal pipes at the University of Tulsa. These tests cover oil–air flow in a 6-inch ID pipe and water–air flow in a 3-inch ID pipe employing dual WMS with 32×32 and 16×16 wires, respectively. For oil–air flow experiments, the superficial liquid and gas velocities vary between 9.2 m/s≤νSG≤15 m/s and 0.01 m/s≤νSL≤0.02 m/s, respectively 2]. In water–air experiments, the superficial liquid and gas velocities vary between 9.1 m/s≤νSG≤33.5 m/s and 0.03 m/s≤νSL≤0.2 m/s, respectively 17], 18]. In order to understand the stratified wavy structure of the flow, the reconstruction of the liquid–gas interface is essential. Due to the relatively low spatial resolution in the WMS measurements of approximately 5 mm, the liquid–gas interface recognition has always an unknown uncertainty level. In this work, a novel algorithm for refined liquid–gas interface reconstruction is introduced for flow conditions where entrainment is negligible. |
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| Keywords: | Wire-mesh sensor Two–phase flow Stratified flow Liquid–gas interface recognition |
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