Flow-Field Numerical Simulation of Gas-Solid Cyclone Separator Based on FLUENT

2017 ◽

Author(s):

Yigang Luan ◽

Lianfeng Yang ◽

Tao Sun

Keyword(s):

Numerical Simulation ◽

Flow Field ◽

Axial Flow ◽

Internal Flow ◽

Operating Pressure ◽

Cyclone Separator ◽

Axial Flow Cyclone ◽

Flow Field Characteristics ◽

Numerical Simulation Methods ◽

Resistance Performance

Axial flow cyclone separator with guide blade has been widely used, due to its low resistance, huge gas processing and small volume. Although its structure is simple, three-dimension strong rotating turbulent flow forms which involves many complex interactions such as dual-phase separation, adsorption and electrostatic interference. This paper is focused on studying the resistance performance of the axial flow cyclone separator. Numerical simulation methods are carried out to acquire the internal flow field characteristics under different operating pressure and temperature conditions. The result shows that the pressure drop decreases under the same operating pressure, as the operating temperature increases. When the operating temperature is the same, the higher operating pressure enhances the value of the pressure drop. Velocity distribution, pressure contours and turbulent viscosity contours have been presented, to analyze the characteristics of the internal airflow, so as to help optimize the design. Experiments are intended to verify the results of numerical simulation and explore the internal flow field of the cyclone separator further. The cyclone separator has 8 rotary blades which are split into 8 parts, namely one blade is 45° in the tangential direction. 0° and 22.5° are chosen in the experiment. The dimensionless pressure distribution is shown. A comparison of the CFD results and the experimental results is made to prove that the numerical simulation methods are correct and accurate. The curve of the numerical simulation results is very close to that of the experimental results with the similar trend. It is concluded that the methods can predict the internal flow field characteristics of the axial flow cyclone separator.

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Research on Characteristics of Flow Field Inside Tangential Inlet Cyclone Separator

Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D ◽

10.1115/imece2012-85145 ◽

2012 ◽

Author(s):

Yigang Luan ◽

Pengfei Liu ◽

Haiou Sun ◽

Yulin Deng

Keyword(s):

Numerical Simulation ◽

Flow Field ◽

Empirical Formula ◽

Research Result ◽

Internal Flow ◽

Cyclone Separator ◽

Resistance Characteristic ◽

Simulation Results ◽

Tangential Inlet ◽

Simulation Scheme

Flow field inside tangential cyclone separator is a kind of complex three-dimensional rotation turbulent flow. To optimize the flow field structure and shorten the cycle of research and development, it is essential to find an appropriate calculation method to predict the flow field inside cyclone separators. In the article, FLUENT software is employed to obtain the internal flow field of tangential inlet cyclone separator by adopting different calculation models and different numerical simulation scheme. Also the simulation result was compared with that of existing experiment data to find a reasonable solution for the simulation of the flow field characteristics inside the cyclone. After the examination to the rationality of the different numerical simulation method, and the comparative analysis in the main flow field parameters of the simulated results which is the most reasonable combination, the flow characteristics of internal flow field of tangential inlet cyclone separator was obtained. The results show that: when the grid number of calculation domain reach 860000, it can cater to the calculation conditions of flow field, and the simulation results can agree with the experimental data better and will hardly change with the grid number; On the basis of standard k-ε model, the numerical simulation scheme was formulated by the orthogonal experiment method, through the comparison of results, the best combinations are 2 and 11; Applying the optimized combination to RNG k-ε model, Realizable k-ε model and RSM model and comparing simulation results with the existing one show that RSM was the ideal model used in simulation; With the change of the flow rate came a resistance characteristic curve of cyclone separator. The comparison between it and the predicted results of existing empirical formula of resistance characteristic drew the numerical simulation result, which is closest to Dirgo empirical formula; the first and second order upwind form have certain influence on the numerical simulation results, but the second one is more accurate in terms of simulating and predicting the parameters distribution inside flow field. This research result has certain reference value for cyclone separator design and performance optimization.

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Numerical Simulation of the Influence of Outer Chamber Height on Flow Field in Circumfluent Cyclone Separator

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.694-697.555 ◽

2013 ◽

Vol 694-697 ◽

pp. 555-559

Author(s):

Ji Hai Duan ◽

Xing Xing Guan

Keyword(s):

Numerical Simulation ◽

Pressure Drop ◽

Flow Field ◽

Optimization Design ◽

Simulation Method ◽

Velocity Fields ◽

Cyclone Separator ◽

Outer Chamber ◽

Pressure Fields ◽

Chamber Height

Through the numerical simulation method, the Reynolds stress turbulence model (RSM) was used to simulate the flow field of circumfluent cyclone separator with three different outer chamber heights. Three circumfluent cyclones (CFC), with different outer chamber heights, are compared with each other. Pressure fields, velocity fields and pressure drop have been investigated. The results show that in a certain range, the outer chamber height of circumfluent cyclone separator has an optimum value, which can have higher separate efficiency and lower pressure drop. This provides a strong theoretical basis for the local optimization design of the cyclone.

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Research on Characteristics of Flow Field Inside Tangential Inlet Cyclone Separator by Orthogonal Design Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.516-517.992 ◽

2012 ◽

Vol 516-517 ◽

pp. 992-996

Author(s):

Yi Gang Luan ◽

Peng Fei Liu ◽

Hai Ou Sun

Keyword(s):

Numerical Simulation ◽

Flow Field ◽

Design Method ◽

Orthogonal Design ◽

Research Result ◽

Test Method ◽

Cyclone Separator ◽

Orthogonal Design Method ◽

Tangential Inlet ◽

Simulation Scheme

The flow field inside cyclone separator is a kind of complex three-dimensional rotation turbulent flow with two-phase separation phenomenon. In order to optimize the structure and shorten the cycle of research and development, it is very essential to find the appropriate calculation method for the flow field inside cyclone separator. In this article, the internal flow field of tangential inlet cyclone separator was simulated and calculated by adopting different calculation model and different numerical simulation scheme by orthogonal design method. And the result was compared with that of existing experiment to find a reasonable method for the simulation of the flow field inside the cyclone. On the basis of standard k-ε model, the numerical simulation scheme was formulated by the orthogonal test method, through the comparison of results, the best combinations are gained; This research result has certain reference value for cyclone separator design and performance optimization.

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Study of Operating Parameters’ Impact on Separation Performance of Cyclone Separator

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.422.794 ◽

2011 ◽

Vol 422 ◽

pp. 794-798

Author(s):

Xue Ping Wang ◽

Ying Zhang ◽

Ju Guang Xue ◽

Zhen Wei Zhang

Keyword(s):

Numerical Simulation ◽

Flow Field ◽

Flow Velocity ◽

Turbulence Model ◽

Separation Efficiency ◽

Operating Parameters ◽

Separation Performance ◽

Cyclone Separator ◽

High Concentration ◽

Secondary Particles

The numerical simulation can be obtained by taking advantage of turbulence model of Fluent to study the gas-solid flow field of cyclone separator. The pressure of the cyclone drops increases with the enhancement of the inlet flow velocity, and the increase amplitude can become larger and larger. The separation efficiency of the cyclone enhances gradually as the increase of the flow. The increase amplitude of small and secondary particles is much lager compared with the increase amplitude of big ones. The overall separation efficiency can strengthen gradually with increasing of particles concentration as well as the each part’s efficiency. But the separation efficiency will stay in stable level when the concentration reaches a certain value with the big particles in the low concentration and small ones in a relatively high concentration.

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