Gas–cyclone body coupling vibration is one kind of vibration caused by air pulsation. This coupling vibration causes widespread damage and deformation of three-stage cyclone separator used in residue fluid catalytic cracking. After theoretically analyzing the mechanism of the generation of the gas–cyclone body coupling vibration, the numerical simulation of three-dimensional swirling flow the cyclone separator was performed by using Reynolds stress model (RSM). The results showed the existence of precessing vortex core (PVC) in the cyclone separator. The PVC phenomenon and motion of PVC were described in detail. Furthermore, the amplitude and frequency of gas fluctuation in the PVC region at different axial positions were quantitatively analyzed. The simulation results agreed with the experimental results of laser Doppler velocimetry (LDV). Finally, characteristics of PVC in cyclone separator with a novel vortex finder were designed, and the results showed that the novel vortex finder can reduce flow vibration.
Issue Section:
Technical Brief
References
References
1.
Pisarev
, G. I.
Hoffmann
, A. C.
2012
, “Effect of the End of the Vortex’ Phenomenon on the Particle Motion and Separation in a Swirl Tube Separator
,” Powder Technol.
, 222
(5
), pp. 101
–107
.2.
Derksen
, J. J.
van den Akkar
, H. E. A.
Sundaresan
, S.
2008
, “Two-Way Coupled Large-Eddy Simulation of Gas-Solid Flow in Cyclone Separators
,” AIChE J.
, 54
(4
), pp. 872
–885
.3.
Shukla
, S. K.
Shukla
, P.
Ghosh
, P.
2013
, “The Effect of Modeling of Velocity Fluctuation on Prediction of Collection Efficiency of Cyclone Separators
,” Appl. Math. Modell.
, 37
(8
), pp. 5774
–5789
.4.
Hreiz
, R.
Gentric
, C.
Midoux
, N.
2011
, “Numerical Investigation of Swirling Flow in Cylindrical Cyclone
,” Chem. Eng. Res. Des.
, 89
(12
), pp. 2521
–2539
.5.
Griffiths
, W. D.
Boysan
, F.
1996
, “Computational Fluid Dynamics (CFD) and Empirical Modeling of the Performance of a Number of Cyclone Samples
,” J. Aerosol Sci.
, 27
(2
), pp. 281
–304
.6.
Cortes
, C.
Gil
, A.
2007
, “Modeling the Gas and Particle Flow Inside Cyclone Separators
,” Prog. Energy Combust. Sci.
, 33
(5
), pp. 409
–452
.7.
Kepa
, A.
2010
, “Division of Outlet Flow in a Cyclone Vortex Finder: The CFD Calculations
,” Sep. Purif. Technol.
, 75
(2
), pp. 127
–131
.8.
Qiu
, Y. F.
Deng
, B. Q.
Kim
, C. N.
2012
, “Numerical Study of the Flow Field and Separation Efficiency of a Divergent Cyclone
,” Powder Technol.
, 217
(2
), pp. 231
–237
.9.
Gao
, X.
Chen
, J. F.
Feng
, J. M.
Peng
, X. Y.
2014
, “Numerical Investigation of the Effects of the Central Channel on the Flow Field in an Oil-Gas Cyclone Separator
,” Comput. Fluids
, 92
(3
), pp. 45
–55
.10.
Raoufi
, A.
Shams
, M.
Farzaneh
, M.
Ebrahimi
, R.
2008
, “Numerical Simulation and Optimization of Fluid Flow in Cyclone Vortex Finder
,” Chem. Eng. Process.
, 47
(1
), pp. 128
–137
.11.
Elsayed
, K.
Lacor
, C.
2011
, “Numerical Modelling of the Flow Field and Performance in Cyclones of Different Cone-Tip Diameters
,” Comput. Fluids
, 51
(1
), pp. 48
–59
.12.
Elsayed
, K.
Lacor
, C.
2013
, “The Effect of Cyclone Vortex Finder Dimensions on the Flow Pattern and Performance Using LES
,” Comput. Fluids
, 71
(30
), pp. 224
–239
.13.
Boysan
, F.
Ayers
, W. H.
Swithenbank
, J.
1982
, “A Fundamental Mathematical Modeling Approach to Cyclone Design
,” Chem. Eng. Res. Des.
, 60
(4
), pp. 222
–230
.14.
Shukla
, S. K.
Shukla
, P.
Ghosh
, P.
2011
, “Evaluation of Numerical Schemes Using Different Simulation Methods for the Continuous Phase Modeling of Cyclone Separators
,” Adv. Powder Technol.
, 22
(2
), pp. 209
–219
.15.
Horvath
, A.
Jordan
, C.
Harasek
, M.
2008
, “Influence of Vortex-Finder Diameter on Axial Gas Flow in Simple Cyclone
,” Chem. Prod. Process Model.
, 3
(1
), pp. 1
–26
.16.
Raoufi
, A.
Shams
, M.
Kanani
, H.
2008
, “CFD Analysis of Flow Field in Square Cyclones
,” Powder Technol.
, 191
(3
), pp. 349
–357
.17.
Martignoni
, W. P.
Bernardo
, S.
Quintani
, C. L.
2007
, “Evaluation of Cyclone Geometry and Its Influence on Performance Parameters by Computational Fluid Dynamics (CFD)
,” Braz. J. Chem. Eng.
, 24
(1
), pp. 83
–94
.18.
Oh
, J.
Choi
, S.
Kim
, J.
2015
, “Numerical Simulation of an Internal Flow Field in a Uniflow Cyclone Separator
,” Powder Technol.
, 274
(4
), pp. 135
–145
.19.
Song
, J. F.
Sun
, G. G.
Chao
, Z. X.
Wei
, Y. D.
Shi
, M. X.
2010
, “Gas Flow Behavior and Residence Time Distribution in a FCC Disengage Vessel With Different Coupling Configurations Between Two-Stage Separators
,” Powder Technol.
, 201
(3), pp. 258
–265
.20.
Shalaby
, H.
Pachler
, K.
Wozniak
, K.
Wozniak
, G.
2005
, “Comparative Study of the Continuous Phase Flow in a Cyclone Separator Using Different Turbulence Models
,” Int. J. Numer. Methods Fluids
, 48
(11
), pp. 1175
–1197
.21.
Derksen
, J. J.
Sundaresan
, S.
van den Akker
, H. E. A.
2006
, “Simulation of Mass-Loading Effects in Gas-Solid Cyclone Separators
,” Powder Technol.
, 163
(1–3), pp. 59
–68
.22.
Shalaby
, H.
Wozniak
, K.
Woaniak
, G.
2006
, “Particle-Laden Flow Simulation in a Cyclone Separator
,” Appl. Math. Mech.
, 6
(1
), pp. 547
–548
.23.
Jiao
, J. Y.
Liu
, Z. L.
Zheng
, Y.
2007
, “Evaluations and Modifications on Reynolds Stress Model in Cyclone Simulations
,” Chem. Eng. Technol.
, 30
(1
), pp. 15
–20
.24.
Liu
, B. C.
1994
, Engineering Computational Mechanics
, Mechanical Industry Press
, Beijing, China
, pp. 338
–341
.Copyright © 2016 by ASME
You do not currently have access to this content.
