Numerical simulation of particle concentration in

Authors: Xiaohu Xue Guogang Sun Gujun Wan Mingxian Shi

Publish Date: 2008/01/11

Volume: 4, Issue: 3, Pages: 76-83

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Abstract

The particle concentration inside a cyclone separator at different operation parameters was simulated with the FLUENT software The Advanced Reynolds Stress Model ARSM was used in gas phase turbulence modeling Stochastic Particle Tracking Model SPTM and the ParticleSourceInCell PSIC method were adopted for particles computing The interaction between particles and the gas phase was also taken into account The numerical simulation results were in agreement with the experimental data The simulation revealed that an unsteady spiral dust strand appeared near the cyclone wall and a nonaxisymmetrical dust ring appeared in the annular space and under the cover plate of the cyclone There were two regions in the radial particle concentration distribution in which particle concentration was low in the inner region r/R⩽075 and increased greatly in the outer region r/R075 Large particles generally had higher concentration in the nearwall region and small particles had higher concentration in the inner swirling flow region The axial distribution of particle concentration in the inner swirling flow r/R⩽03 region showed that there existed serious fine particle entrainment within the height of 05D above the dust discharge port and a shortcut flow at a distance of about 025D below the entrance of the vortex finder The dimensionless concentration in the highconcentration region increased obviously in the upper part of the cyclone separation space when inlet particle loading was large With increasing gas temperature the particle separation ability of the cyclone was obviously weakenedXue Xiaohu was born in 1965 He received his PhD from the China University of Petroleum Beijing in 2005 As a Professorial Senior Engineer he now works at China National Petroleum Corporation Services Engineering Ltd with his interests in the field of numerical simulation of gasparticle twophase flow

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