Modelling of the Pressure Drop in Tangential Inlet Cyclone Separators

Karagöz, İrfan; Avcı, Atakan

doi:10.1080/02786820500295560

Cited by 81 publications

(39 citation statements)

References 25 publications

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“…To explain and enhance cyclone performance, several semiempirical models have been proposed [1]. Studies on pressure drop generally focus on modifications of the cyclone dimensions [2], or occasionally, on modifications of the cyclone working parameters [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of Geometrical Parameters on the Pressure Drop for a Modified Cyclone Separator

2016

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Experimental results for a conventional cyclone and a modified cyclone with an adjustable vortex stopper are presented. The modified design is based on the idea of decreasing the surface friction by leaving a separation space between the cylindrical part and the vortex stopper. The measured pressure losses were compared for various exit pipe diameters, cylinder heights, cone bottom diameters, and inlet velocities for the conventional as well as for the modified design. The comparative studies indicate a similar behavior of the pressure loss coefficient for both cyclones. Additionally, the exit pipe diameter has a more significant effect on both cyclones compared to the other parameters. Increasing the length of the cyclone reduced the pressure losses for all cases examined.

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Section: Introductionmentioning

confidence: 99%

Effects of Geometrical Parameters on the Pressure Drop for a Modified Cyclone Separator

2016

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“…The results show that Dirgo's model (Dirgo, 1988) yields a best prediction of cyclone pressure drop under different operated inlet velocities with the errors of 2.7 -54.4%. Since the pressure drop coefficient (α ) for Dirgo's model includes the other dimensions of cyclone (Karagoz and Avci, 2005). between experimental data and four empirical models.…”

Section: Pressure Drop Prediction Under Different Inlet Velocitiesmentioning

confidence: 99%

Performance of a Combined Cyclone-Filter Aerosol Collector

Sangkhamanee

Tekasakul

et al. 2011

Particulate Science and Technology

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Cyclone collector is one of the most widely used as industrial devices for coarse particle removal from gas stream, mostly used as the pre-cleaner before other methods such as filtration. This is due to the low collection efficiency of cyclone for fine particles. In this work a lab-scale cyclone was modified by adding filter in the space between the inner core and the wall of the cyclone in order to meet the higher collection performance for the fine particles (0.3 -1.0 μm). The collection performance of the combined cyclone-filter collector was compared with those of cyclone and filter only. The effects of parameters, such as particle size and inlet velocity, on the collection efficiency and pressure drop were studied. Besides, filter characteristics were also investigated. The results show that the aerosol penetration for the test cyclone collector decreases with increasing inlet velocities or particle sizes. Moreover, the theoretical calculations show the best fit for Crawford model at all inlet velocities. In comparison with the cyclone, the penetration of the cyclone combined with fibrous filter for particle sizes of 0.3, 0.5 and 1.0 μm is found to be lower by 0.4 -2.2%, 0.6 -6.2% and 3.2 -9.4%, respectively, for 4-mm filter width and 0.3 -5.5% , 1.3 -15.8% and 1.7 -19.9%, respectively, for 8-mm filter width.The penetration of the cyclone combined with stainless steel filter is also found to be lower by 0.6 -4.7% , 0.8 -13.7% and 1.1 -20.9%, respectively, for 0.94 g of stainless steel filter and 3.7 -14.8% , 4.3 -31.2% and 11.6 -41.2%, respectively, for 1.83 g of stainless steel filter. Moreover, the pressure drop of the cyclone combined with 4-mm and 8-mm fibrous filter is lower than that of the cyclone by 32.7 and 38.8% for 4 mm and 8 mm fibrous filter, respectively, and 23.5 and 20.5% for 0.94 g and 1.83 g of stainless steel filter, respectively.

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“…The dust particles leave the cyclone through the opening of apex cone while the gas swirls upwards in the centre of dust chamber and leaves the cyclone through vortex finder. Despite the simple design and geometric construction of the cyclone separator, the physics describing the fluid flow and particle motion in a cyclone separator is very complex owing to three dimensional nature of the flow, high turbulence level, strong anisotropy and interaction between fluid, dust particles and the surrounding wall (Karagoz and Avci, 2005). The exact nature of fluid flow in the cyclone separator is not yet completely known even after more than 100 years of research (Wong et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Numerical Schemes for Dispersed Phase Modeling of Cyclone Separators

Shukla

Ghosh

2011

Engineering Applications of Computational Fluid Mechanics

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This study investigates the performance of different discretization schemes for simulation of dispersed phase of cyclone separators by using Reynolds stress turbulence model facility of CFD code Fluent 6.3.26. The continuous flow inside the cyclone separator is simulated by solving Reynolds averaged three dimensional unsteady Navier-Stokes equation in Eulerian reference frame whereas the dispersed phase is modeled using Lagrangian approach. Analysis of computed results shows that the high order discretization schemes give satisfactory performance for simulation of dispersed particles of all size. However the prediction of trapezoidal discretization scheme is found to be marginally better than that of the Runge-Kutta scheme. The low order schemes and combination of low order and high order schemes failed to predict accurately the collection efficiency of the smaller dispersed particles. The results suggest that the CFD method using trapezoidal scheme for discretization of equation of motion of dispersed particles is the optimum choice for simulation of the second phase of cyclone separators.

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Modelling of the Pressure Drop in Tangential Inlet Cyclone Separators

Cited by 81 publications

References 25 publications

Effects of Geometrical Parameters on the Pressure Drop for a Modified Cyclone Separator

Effects of Geometrical Parameters on the Pressure Drop for a Modified Cyclone Separator

Performance of a Combined Cyclone-Filter Aerosol Collector

Evaluation of Numerical Schemes for Dispersed Phase Modeling of Cyclone Separators

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