Effect of the inlet angle on the performance of a cyclone separator using CFD-DEM

Wang, Shuyan; Li, Haolong; Wang, Ruichen; Wang, Xu; Tian, Ruichao; Sun, Qiji

doi:10.1016/j.apt.2018.10.027

Cited by 122 publications

(34 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Van et al [16] used RSM to discuss the effect of inlet angle on single-phase flow field in the separator and presented the differences in the distribution of the flow field under different situations and the improved design of the separator structure. Wang et al [17] also used RSM to simulate the cyclone field in the separator and obtained the pressure drop and velocity distribution rules of the flow field in the separator, and the simulation results were basically consistent with the experimental results. On this basis, Zhu et al [18] studied the outlet forms at the bottom of the separator by using RSM, discussed the influence of different outlet forms on the flow field distribution, and believed that the single tangential outlet is more conducive to improving the separation efficiency.…”

Section: Introductionmentioning

confidence: 61%

Numerical Study on the Influence of Length-Diameter Ratio on the Performance of Dynamic Pressure Oil-Air Separator

Zhang

et al. 2021

International Journal of Chemical Engineering

View full text Add to dashboard Cite

In order to study the separation characteristics of the aeroengine dynamic pressure oil-air separator, this paper uses the coupling method of PBM and CFD two-fluid model to study the influencing factors such as cylinder diameter, cylinder length, and other factors on the separator performance. The flow field structure, velocity, gas volume distribution, separation efficiency, and gas and liquid holdup rate in the separator under different operating conditions are analyzed. Combined with the analysis results of the cylinder diameter and the cylinder length, the influence law of length-diameter ratio on separation efficiency is summarized. The optimum length-to-diameter ratio that maximizes the separation performance of the separator is obtained in this research, which provides a reference for the design and improvement of the separator. The results show that, as the diameter of the cylinder increases, the separation efficiency increases first and then decreases. When dsep = 16 mm and dsep = 18 mm, the separator reaches its maximum efficiency, which is about 93%. With the increase of the cylinder length, the separation efficiency first increases and reaches the maximum when l2 = 90 mm and then decreases slowly. When the separator cylinder is either too long or too short, it will cause the separation performance to decrease. There is an optimal aspect ratio. There is an optimal aspect ratio, and the separation performance of the separator is the best when the aspect ratio is between 5 and 6.

show abstract

Section: Introductionmentioning

confidence: 61%

Numerical Study on the Influence of Length-Diameter Ratio on the Performance of Dynamic Pressure Oil-Air Separator

Zhang

et al. 2021

International Journal of Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…7. The distribution of the tangential velocity in all cyclones consisted of a free vortex in the outer region and a forced vortex at its inner part (V-shaped) which presented the expected Rankine-type vortex [39]. The tangential velocity approximately distributed symmetrically around the central axis of the square cyclones.…”

Section: Tangential Velocitymentioning

confidence: 91%

Performance assessment of a square cyclone influenced by inlet section modifications

Hosseini

2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

The main objective of the present study was to analyze the effect of varying the inlet shape on the flow field and overall performance in a square cyclone. Three different inlet shapes, namely straight, inclined, and bend inlets, were specifically proposed to improve the low separation efficiency of the square cyclone. A three-dimensional numerical simulation was done by solving the Reynolds averaged Navier-Stokes equations with the Reynolds stress model turbulence model and applying the Eulerian-Lagrangian two-phase method. The turbulent dispersion of particles was predicted by the application of the discrete random walk model. Comprehensive comparisons of pressure drop, separation efficiency, 50% cut sizes, and flow field were performed to demonstrate the mechanism of how the inlet shape influenced the square cyclone performance. The results extracted from computational fluid dynamics simulation demonstrated that although using inclined and bend inlets produced an increase in pressure drop, they positively enhanced the separation efficiency of the square cyclone. Among all inlet shapes, inclined inlet significantly helped the square cyclone to collect finer particles, as it reduced the 50% cut sizes approximately 29.4% at an inlet velocity of 28 m/s. Keywords Square cyclone • Inlet shape • Separation efficiency • Eulerian-Lagrangian • Computational fluid dynamics (CFD) Abbreviations C D Drag coefficient ν Gas kinematic viscosity (m 2 /s) K Fluctuating kinetic energy (m 2 /s 2) u i Gas velocity in i-direction (m/s) g i Gravitational acceleration in i-direction (m/s 2) P f Fluctuating energy production (m 2 /s 3) μ Gas dynamic viscosity (kg/ms) ρ Gas density (kg/m 3) ρ p Particle density (kg/m 3) R ij Reynolds stress tensor u pi Particle velocity in i direction (m/s) ε Turbulence dissipation rate (m 2 /s 3) v Velocity (m/s) d p Particle diameter (μm) Re p Relative Reynolds number P Pressure (Pa)

show abstract

“…The momentum term was in second order upwind scheme. The turbulent flow kinetic energy and turbulent dissipation rate were in the first-order upwind scheme with residual accuracy of 10 -3 s [13] .…”

Section: Coupling Parameter Setting Of the Modelmentioning

confidence: 99%

Migration law of flax threshing materials in double channel air-and-screen separating cleaner

Dai¹,

Song²,

Shi³

et al. 2021

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

In order to further clarify and improve the working performance of separating cleaner for flax threshing materials, and study the migration law and characteristics of components of flax threshing materials during separating and cleaning, in this paper, a gas-solid coupling simulation model was established on the separation cleaner for flax threshing materials and a numerical simulation was carried out on the separating and cleaning process. Simulation results showed that, the separating and cleaning effect of the components of flax threshing materials was good under the air-and-screen gas-solid coupling flow field. Meanwhile, the form distribution and the vector distribution of air volume and velocity of flax threshing materials in the air-and-screen devices were obtained. By referring to the migration trajectories of the flax threshing materials in the vibration sieve device, double channel residue collection device and dust absorber, the volume variation, motion trajectories and variation of migration velocity of the components of flax threshing materials over time in different regions were explored. Verification test results showed that, the content impurity rate of the separation cleaner for flax threshing materials was 2.06%, and loss rate in cleaning was 3.08%. Compared with simulation results, the verification test results were 1.23% and 0.42% higher, showing that the established discrete element model on the flax threshing materials and parameter setting were basically feasible. The verification test also verified the correctness of the simulation results of the separating and cleaning process of the flax threshing materials based on gas-solid coupling theory and the feasibility of the research method.

show abstract

Effect of the inlet angle on the performance of a cyclone separator using CFD-DEM

Cited by 122 publications

References 24 publications

Numerical Study on the Influence of Length-Diameter Ratio on the Performance of Dynamic Pressure Oil-Air Separator

Numerical Study on the Influence of Length-Diameter Ratio on the Performance of Dynamic Pressure Oil-Air Separator

Performance assessment of a square cyclone influenced by inlet section modifications

Migration law of flax threshing materials in double channel air-and-screen separating cleaner

Contact Info

Product

Resources

About