Ion current density profiles in negative corona gaps versus EHD confinements |
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| Institution: | 1. Lab Phys Gaz & Plasmas, CNRS, Univ. Paris Sud, CentraleSupelec, Université Paris-Saclay, F-91405, Orsay, France;2. Institut de Radioprotection et de Sûreté Nucléaire (IRSN) PSN-RES/SCA/LPMA, PRP-ENV/SERIS/LRC, PRP-ENV/DIR, Gif-sur-Yvette, 91192, France;1. Institute of Advanced Materials & Technology, University of Science and Technology Beijing, Beijing 100083, China;2. Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, China;3. Department of Mechanical Engineering, University of South Florida, Tampa FL 33620, USA;1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, Guangdong 510640, China;2. Xi''an AMS Center and State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710075, China;3. Tarim Oilfield Company, PetroChina, Kuerle 841000, China;1. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;2. School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA;1. Research Unit of Electrostatic Applications in Energy and Environment, College of Integrated Science and Technology, Rajamangala University of Technology Lanna, Chiang Mai 50220, Thailand;2. Center of Excellence in Electromagnetic Energy Utilization in Engineering, Department of Mechanical Engineering, Faculty of Engineering, Thammasat University, Pathum Thani 12121, Thailand;1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China;2. College of Physics, Optoelectronics and Energy of Soochow University, Suzhou 215006, PR China |
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| Abstract: | This paper deals with the electric and hydrodynamic confinement of negative ions in a point-to-plane corona discharge gap. Radial ion current density profiles have been measured on the earthed planar electrode, drilled in the axis of the point. The experimental setup is first validated by comparison with the Warburg's law without injected gas flow rate. The gas injected in the gap and blown from the discharge gap through the hole located at the centre of the plane affects neither the electric field close to the point nor the subsequent electric wind. However, it leads to the confinement of ions flux towards the central symmetry axis in the low electric field region up to a critical gas velocity, which for no more effect is measurable. Hence, electro hydro-dynamics confinement of ions can be achieved by limiting the outward radial expansion of ions to increase ion current densities on specific locations close to the low field planar electrode. |
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| Keywords: | Corona discharge EHD Ion confinement warburg's law Ion current density |
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