Abstract
To describe the flow of flue gases in the working space of the exhaust shaft of an industrial chimney, a three-dimensional mathematical model based on the Favre-averaged complete Navier-Stokes equations closed by k-ε – a turbulence model using improved wall functions is proposed. Thus, it is possible to draw up a detailed physical picture of the process under study, to establish the presence of a significant part of the internal volume of the barrel of intensive secondary flows, vortex zones, which have a significant effect on the kinematic structure of the entire flow, on the nature of the velocity distribution in its various cross sections, as well as on friction, heat transfer and mass transfer in the parietal regions. The calculations showed that a swirling gas flow, which reduces the corrosion resistance of its walls appears in the root of the chimney. This undesirable phenomenon noticeably weakens in case of installation of special ramps or partitions at the inlet of the outlet trunk.
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