The use of perforated plates to control the flow emerging from a wide-angle diffuser,with application to electrostatic precipitator design |
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| Institution: | 1. School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty Queensland University of Technology, Brisbane, QLD 4000, Australia;2. School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW 2006, Australia;1. Department of electronic technology, Engineering Technical College-Baghdad, Middle Technical University (MTU) Baghdad, Iraq |
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| Abstract: | The flow through a wide-angle, pyramidal diffuser of area ratio 6.8, in which two perforated plates are used to control the emergent velocity distribution was investigated. (Wide-angle diffusers combined with perforated plates find application in electrostatic precipitator flow systems. The efficacy of these systems depends critically on the uniformity of the gas flow within the collection chamber downstream of the diffuser outlet plane.) The main results of the study are (i) the establishment of the main factor influencing the flow at the diffuser exit plane, (ii) the determination of plate characteristics which produce a uniform velocity profile in the collection chamber, and (iii) the establishment of the corresponding pressure drop characteristics of the plate—diffuser combinations. The results also extend the range of diffuser geometries for which two perforated plates provide uniform velocity profiles at exit. |
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