Numerical study of flow field in new cyclone separators

Abstract Numerical study of the fluid flow and particle dynamics is presented by numerical techniques to characterize the performance of new cyclone separators. The design of this cyclone is based on the idea of improving cyclone performance by increasing the vortex length. This cyclone differs from a conventional cyclone with the separation space. Instead of conical part, the separation space of this cyclone consists of an outer cylinder and a vortex limiter. The Reynolds averaged Navier–Stokes equations with Reynolds stress turbulence model (RSM) are solved by use of the finite volume method based on the SIMPLE pressure correction algorithm in the computational domain. The Eulerian–Lagrangian computational procedure is used to predict particles tracking in the cyclones. The velocity fluctuations are simulated using the Discrete Random Walk (DRW). In the results the dependency of collection efficiency and pressure drop on different geometrical parameters is investigated. Contours of velocity, pressure and turbulent kinetic energy within these cyclones are shown. Tangential velocity profiles and velocity vectors in different sections are investigated.

[1]  M. R. Kuhlman,et al.  Design and Performance Evaluation of a Novel Double Cyclone , 2001 .

[2]  Kenji Yoshida,et al.  Particle separation by Iinoya's type gas cyclone , 2001 .

[3]  Abolfazl Khalkhali,et al.  Pareto based multi-objective optimization of a cyclone vortex finder using CFD, GMDH type neural networks and genetic algorithms , 2012 .

[4]  Alex C. Hoffmann,et al.  Flow pattern in reverse-flow centrifugal separators , 2002 .

[5]  Arman Raoufi,et al.  Numerical simulation and optimization of fluid flow in cyclone vortex finder , 2008 .

[6]  T. G. Chuah,et al.  A CFD study of the effect of cone dimensions on sampling aerocyclones performance and hydrodynamics , 2006 .

[7]  K. W. Lee,et al.  Comparative performances of conventional cyclones and a double cyclone with and without an electric field , 2004 .

[8]  Mingyao Zhang,et al.  Effects of the prolonged vertical tube on the separation performance of a cyclone. , 2006, Journal of hazardous materials.

[9]  Yaxin Su,et al.  Experimental study on the gas-solid suspension flow in a square cyclone separator , 2006 .

[10]  K. W. Lee,et al.  Effects of cone dimension on cyclone performance , 2001 .

[11]  J. Zhang,et al.  Simulation of Gas Flow Pattern and Separation Efficiency in Cyclone with Conventional Single and Spiral Double Inlet Configuration , 2006 .

[12]  B. Launder,et al.  Progress in the development of a Reynolds-stress turbulence closure , 1975, Journal of Fluid Mechanics.

[13]  Alex C. Hoffmann,et al.  Advantages and risks in increasing cyclone separator length , 2001 .

[14]  Satoshi Akiyama,et al.  Effect of apex cone height on particle classification performance of a cyclone separator , 2003 .

[15]  K. W. Lee,et al.  Exploratory Study on Cyclones of Modified Designs , 2001 .

[16]  M. L. Laucks,et al.  Aerosol Technology Properties, Behavior, and Measurement of Airborne Particles , 2000 .

[17]  K. Elsayed,et al.  The effect of cyclone inlet dimensions on the flow pattern and performance , 2011 .

[18]  Guanghui Chen,et al.  Structure and performance of the circumfluent cyclone , 2010 .

[19]  The Effect of a Counter-Cone Position on Cyclone Performance , 2012 .

[20]  Mehrzad Shams,et al.  Numerical simulation of flow field in three types of standard cyclone separators , 2010 .

[21]  Bingtao Zhao,et al.  Numerical simulation of effect of inlet configuration on square cyclone separator performance , 2011 .

[22]  Lingjuan Wang,et al.  Theoretical study of cyclone design , 2005 .

[23]  Yusuke Nishimura,et al.  Effect of apex cone shape on fine particle classification of gas-cyclone , 2010 .

[24]  Irfan Karagoz,et al.  Design and performance evaluation of a new cyclone separator , 2013 .

[25]  S. A. Morsi,et al.  An investigation of particle trajectories in two-phase flow systems , 1972, Journal of Fluid Mechanics.

[26]  Irfan Karagoz,et al.  Numerical investigation of performance characteristics of a cyclone prolonged with a dipleg , 2009 .

[27]  W. D. Griffiths,et al.  Computational fluid dynamics (CFD) and empirical modelling of the performance of a number of cyclone samplers , 1996 .

[28]  Mehrzad Shams,et al.  Numerical simulation of square cyclones in small sizes , 2011 .