EHD flow in a wide electrode spacing spike–plate electrostatic precipitator under positive polarity |
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| Institution: | 1. Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid Flow Machinery, Polish Academy of Sciences, Fiszera 14, 80-231, Gdańsk, Poland;2. Department of Engineering Physics, McMaster University, Hamilton, Ont., Canada L8S 4L7;1. Lab for Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, University of New South Wales, Sydney NSW 2052, Australia;2. Experimental and Research Centre, Fujian Longking Co., Ltd., Longyan 364000, China;1. Laboratoire de Génie Electrique, Université A. Mira de Béjaïa, 06000 Béjaïa, Algeria;2. Electrical Engineering Department, University of Setif_1, 19000, Algeria |
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| Abstract: | In this work, results of two- and three-dimensional particle image velocimetry (PIV) measurements of the flow velocity fields in a wide spacing spike–plate electrostatic precipitator (ESP) under positive polarity are presented. A DC voltage of positive polarity (up to 28 kV) was applied to the spike electrode. The average gas flow velocity was 0.6 m/s. The PIV measurements were carried out in four planes perpendicular to the plate electrodes. Three parallel planes passed along the ESP while one plane passed across the ESP duct. The results show that electrohydrodynamic (EHD) secondary flow with relatively strong vortices exist in the ESP. The EHD secondary flow pattern depends on applied voltage and measuring plane position in respect to the spike tip. The strongest vortices occur in the plane passing through the tip of the upstream-directed spike. These relatively strong EHD vortices may hinder collection of the particles in the diameter range of 0.1–1 μm in the wide electrode spacing spike–plate ESPs. |
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