Research on distribution law of radial and axial flow field in vortex dust control system
To master the flow field characteristics of the vortex dust control device,numerical simulation methods were used to simulate the internal flow field of the vortex dust control system under three models:Standard,RNG,and Realizable.An experimental system was established to test the wind velocity distribution at the radial and axial outlets for verification.The research results show that on the radial outlet,a negative pressure zone is formed within the range of 0.2 m at the beginning,with the maximum air velocity reaching 20 m/s within the range of 0.2-2.0 m.Afterwards,the wind velocity decreases uniformly with increasing distance.In the axial direction,start-ing from the vortex fan,the cross-sectional wind velocity of the pipeline is distributed in a circular shape,exhibiting an axisymmetric M-shaped distribution of low central wind velocity,high surrounding wind velocity,and low wall wind velocity.The cross-sectional wind ve-locity decreases along the way,and after the vortex duct outlet,the cross-sectional wind velocity tends to stabilize.At the pipeline outlet,the maximum wind velocity of the cross-section does not exceed 1.8 m/s.The numerical simulation and experimental results were basi-cally consistent,especially the axial wind velocity distribution law was completely consistent,with the Standard model being the most ac-curate.
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