Impact of cone wall roughness on turbulence swirling flow in a cyclone separator

Dehdarinejad, Ehsan; Bayareh, Morteza; Ashrafizaadeh, Mahmud

doi:10.1007/s11696-022-02261-6

Cited by 20 publications

(10 citation statements)

References 31 publications

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“…The aerodynamic experiments match the simulation results and therefore the numerical calculations have great accuracy in Figure S3. The drag force on the airflow in the channel increases with surface roughness owing to internal vortices and surface friction in Figure S4, although the growth trend slows down gradually, which is consistent with the roughness variation pattern in vortex separators (Dehdarinejad et al , 2022). The following fitted prediction equation in exponential form is obtained using discrete points: …”

Section: Discussionsupporting

confidence: 79%

Effect of silane on corrosion resistance and aerodynamic performance of 6063 Al alloy inertial air–water separator

Wan

et al. 2023

ACMM

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Purpose The purpose of this paper is to improve the corrosion resistance of anodized 6063 Al alloy inertial air–water separator by means of silane technology and to investigate the effect of corrosion-generated surface roughness changes on aerodynamic performance. Design/methodology/approach The BTSE-KH560 double-layer silane film treatment technique is used to close micropores on the anodic oxide film surface. The microstructure of the coating is observed by scanning electron microscopy, the coating structure of the specimens is determined by X-ray diffraction (XPS) and the corrosion resistance is determined by electrochemical and salt-spray tests. Computational fluid dynamics is also used to calculate the effect of roughness and analyse the change in separator performance. Findings The silane film deposited on the surface of the anodic oxide film acts as a good seal against microporous defects on the surface of the anodic oxide film and reduces the surface roughness. Electrochemical and salt-spray tests show that the silane film improved the corrosion resistance of the anodized film. The roughness produced by the corrosion deteriorates the performance of the separator. Originality/value The porous structure of the anodized coating makes it easier for corrosive ions to enter the substrate and cause pitting corrosion. Therefore, in this study, the corrosion behaviour of the coating in the marine environment and its effect on aerodynamic performance are investigated using a BTSE-KH560 double-layer silane coating with a sealing effect.

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Section: Discussionsupporting

confidence: 79%

Effect of silane on corrosion resistance and aerodynamic performance of 6063 Al alloy inertial air–water separator

Wan

et al. 2023

ACMM

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“…where C 1 , C 2 , and C 3 are constants that depend on Re P . 41 Usually, C 1 = 0.6167, C 2 = 46.5, and C 3 = −116.67 for 10 <Re P < 100, or C 1 = 0.357, C 2 = 148.62, and C 3 = − 47,500 for 1000 <Re P < 5000. The additional force F add includes virtual mass force, pressure gradient force, thermophoretic force, Brownian force, and Saffman's lift force.…”

Section: Performance Of the Primary Separation Part Of The Existing S...mentioning

confidence: 99%

“…The equation of particle motion is given by where the sign p refers to the particle, so u p i , ρ p , and d p represent the velocity, density, and diameter of the droplets, respectively. C D is the drag force coefficient, which is calculated as where C 1 , C 2 , and C 3 are constants that depend on Re P . Usually, C 1 = 0.6167, C 2 = 46.5, and C 3 = −116.67 for 10 < Re P < 100, or C 1 = 0.357, C 2 = 148.62, and C 3 = – 47,500 for 1000 < Re P < 5000.…”

Section: Performance Of the Primary Separation Part Of The Existing S...mentioning

confidence: 99%

Performance Investigation and Optimization of the Primary Separation Part of the Oil-Gas Separator

Wang

Hu²,

Xu³

et al. 2023

Ind. Eng. Chem. Res.

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Oil-gas separators are significant in the safe and reliable operation of the natural gas storage system. The separation efficiency of the conventional primary separation part of the oil-gas separator was not high enough, causing the insufficient performance of the whole separator. Three modification schemes were proposed to optimize the primary separation part of the oil-gas separator, including adding a curved baffle at the entrance, forming a centrifugal separation through the tangential inlet, and forming a cyclone structure by adding an inner cylinder. The separation performance was obtained through the Eulerian–Lagrangian approach numerically. For each scheme, a variety of parameter combinations were designed by the orthogonal array and the structure with the highest separation efficiency was reasonably selected. The separation efficiency of the centrifugal structure was higher than that of the collision structure on the whole. To evaluate the feasibility of the practical application, the three structural schemes were compared coupled with the analytic hierarchy process (AHP) based on the separation efficiency, the pressure loss, the uniformity of filter inlet velocity, and the modification cost. The results showed that the scheme of adding a curved baffle with reasonable structural parameters at the entrance had better comprehensive performance, which could be used as the optimal scheme in improving the oil-gas separator applied in natural gas storage.

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“…160 On the other hand, the turbulence intensity in cyclone separators is directly related to the square of the fluctuating velocity, and this turbulent energy significantly impacts the dispersion of particles within the system. 12,161,162 Particularly, for larger diameter particles, as introduced in this study case, the turbulence intensity plays a crucial role in determining whether they are trapped or able to escape. As a result, it significantly influences the overall performance of gas−particle cyclones.…”

Section: Gas−particle Flow Pattern 421 Gas Flow Analysismentioning

confidence: 99%

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

El-Emam,

Zhou,

Bai

et al. 2023

Ind. Eng. Chem. Res.

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This research presents a comprehensive study aimed at investigating the influence of different cyclone geometries on the flow field and performance in gas−bioparticle flows. Five distinct cyclone designs, including Stairmand high-efficiency (St 1 ), Stairmand high-flow (St 2 ), Swift high-efficiency (Sw 1 ), Swift highflow (Sw 2 ), and typical Lapple (TL), were involved. The investigation utilized a combination of computational fluid dynamics (CFD) and the discrete element method (DEM) to model the gas−particle behavior. The DEM accounted for the motion of individual particles using Newton's equations, while the CFD solved the Navier−Stokes equations to model the gas flow as a continuous medium. This numerical model successfully simulated the cyclone performance under three-dimensional (3D) true shape modeling of large-sized nonspherical bioparticles considering the particle−particle and particle−wall interaction forces. The experimental validation and verification of the model demonstrated an acceptable agreement with the simulated data. The findings revealed that cyclone dimensions significantly impacted both performance and particle behavior even when operating under identical conditions. Cyclones with matching dimensions between the bottom and vortex finder exhibited improved separation efficiency, while an increase in the vortex finder's diameter led to decreased efficiency, as in St 2 and Sw 2 cyclones. A comprehensive force analysis pinpointed regions of intense particle−wall collisions, predominantly at the cone wall apex and the wall opposite the cyclone inlet, particularly evident in St 1 , Sw 1 , and TL cyclones. Notably, particle−particle interaction forces played a crucial role in cyclone performance with increased separation efficiency observed due to particle collisions. The particle−gas forces, including drag and pressure gradient forces, were mainly affected in the inlet region and extended into the cylindrical part. The pressure gradient force exhibited a minimal impact on particle behavior. Among the cyclone designs tested, the Sw 1 cyclone demonstrated outstanding performance, achieving an impressive effectiveness of 94.4% under the given operational conditions. These findings provide a better understanding of the working mechanisms of gas−particle cyclones and similar swirling multiphase flow systems, allowing for improved optimization.

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Impact of cone wall roughness on turbulence swirling flow in a cyclone separator

Cited by 20 publications

References 31 publications

Effect of silane on corrosion resistance and aerodynamic performance of 6063 Al alloy inertial air–water separator

Effect of silane on corrosion resistance and aerodynamic performance of 6063 Al alloy inertial air–water separator

Performance Investigation and Optimization of the Primary Separation Part of the Oil-Gas Separator

Modeling and Performance Analysis of Different Gas–Bioparticle Cyclone Separators: CFD–DEM Simulations

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