Numerical Simulation of Gas Flow Field in Gas-Liquid Hydrocyclone Separator

Abstract:

The gas flow field in hydrocyclone separator was numerically simulated by applying RSM turbulence model, and the gas flow velocity distribution and stress distribution were calculated. According to the characteristics of gas flow distribution within the separator, it is found that: (1) the rotating strength of gas flow is related to the outlet angle of guide blade, the greater the outlet angle, the smaller the tangential velocity; (2) the obvious short circuit flow distribution under the exhaust pipe mouth area is easy to carry droplets and roll them out, causing a decrease in separation efficiency; (3) the high strength of turbulence pulse at mouth area of vent and drainage is easy to break the droplets and decrease their diameter, which affects the separation efficiency. The above research results lay the foundation for the structure optimization and the improvement of separation properties of axial guide vane cyclone gas-liquid separator.

• Periodical: Applied Mechanics and Materials (Volume 109)
• Pages: 509-516
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.109.509
• Online since: October 2011
• Authors: Xiang Hong Jin, Feng Shuang Han, Jin Liang Zhang, Hui Huang, Xin Wen Liu
• Keywords: Flow Field, Hydrocyclone Separator, LDV, Numerical Simulation

References

[1] A. C. Hoffmann and L. E. Stein: Gas Cyclones and Swirl Tubes: Principles, Design and Operation. New York (2007), Springer.

[2] S. Movafaghian, J.A. Jaua-Marturet, R.S. Mohan et al: The effects of geometry, fluid properties and pressure on the hydrodynamics of gas-liquid cylindrical cyclone separators. International Journal of Multiphase Flow Vol. 26 (2000), pp.999-1018.

DOI: 10.1016/s0301-9322(99)00076-2

[3] I. Arpandi, A.R. Joshi, O. Shoham et al: Hydrodynamics of two-phase flow in gas-liquid cylindrical cyclone separators. Soc of Petre Eng Vol. 1(4) (1996), pp.427-436.

DOI: 10.2118/30683-pa

[4] A. J. Hoekstra, J. J. Derksen and H.E.A. Van Den Akker: An experimental and numerical study of turbulent swirling flow in gas cyclones. Chemical Engineering Science Vol. 54(13) (1999), p.2055-(2065).

DOI: 10.1016/s0009-2509(98)00373-x

[5] J. J. Derksen: Separation performance predictions of a stairm and high-efficiency cyclone. AIChE Vol. 49(6), 2003, pp.359-1370.

[6] S. Murphy, R. Delfos, M.J.B.M. Pourquiéb et al: Prediction of strongly swirling flow within an axial hydrocyclone using two commercial CFD codes. Chemical Engineering Science Vol. 62(6) (2007), pp.1619-1635.

DOI: 10.1016/j.ces.2005.10.031

[7] J. Wang: Modelling of strongly swirling flows in a complex geometry using unstructured meshes. International Journal of Numerical Methods for Heat & Fluid Flow Vol. 16(8) (2006), pp.910-926.

DOI: 10.1108/09615530610702069

[8] B. Wang, K.W. Chu and A.B. Yu: Numerical study of particle fluid flow in a hydrocyclone. Ind Eng Chem Res Vol. 46(13) (2007), pp.4695-4705.

DOI: 10.1021/ie061625u

[9] J.C. Cullivan, R.A. Williams and C.R. Cross: Understanding the hydrocyclone separator through computational fluid dynamics. Trans IChemE Vol. 81 (2003), Part A, pp.455-466.

DOI: 10.1205/026387603765173718

[10] J.Y. Jiao, Z.L. Liu and Y. Zheng: Evaluations and modifications on Reynolds stress model in cyclone simulations. Chem Eng Technol Vol. 30(1) (2007), pp.15-20.

DOI: 10.1002/ceat.200600311

[11] K.U. Bhaskar, Y.R. Murthy, M.R. Raju et al: CFD simulation and experimental validation studies on hydrocyclone. Minerals Engineering Vol. 20(1) (2007), pp.60-71.

DOI: 10.1016/j.mineng.2006.04.012

[12] M. Narasimha, M Brennan and P.N. Holtham: Large eddy simulation of hydrocyclone¾prediction of air-core diameter and shape. International Journal of Mineral Processing Vol. 80(1) (2006), pp.1-14.

DOI: 10.1016/j.minpro.2006.01.003

[13] L. Hu, L. Zhou and M. Shi: Studies on strongly swirling flows in the full space of a volute cyclone separator. AIChE Vol. 51(3) (2005), pp.740-749.

DOI: 10.1002/aic.10354